For the paranoid, installing 4 gauges/probes is the only way to feel reassured. You may Currently it has single port heads and is running with a 30-PICT carburetor. Once the gasket starts to burn, a gap quickly appears because the rest of the gasket keeps the head under torque and fails to heal itself. Some of the 1.8L Type 4 VW engines used sodium valves and you can identify them by the dimple in the center of the head and the 0.008" valve adjustment specification for this model instead of the normal 0.006" clearance. If air is heard/felt through the crankcase breather or oil filler tube, the air is leaking past the rings. Although problems can be caused by assembly errors, failure is often caused when the engine is pushed beyond its limits for long periods of time. Because Aluminum is much better at radiating heat (cooling) than cast iron, Porsche and Mahle worked to develop a wall plating that would allow the piston rings to seal against the cylinder wall. Install your new head gaskets that should be included as part of your rebuild kit, taking care to make sure that they are installed with the correct side facing up. Your VW Source for Made In The USA Aircooled VW Cylinder Heads, Engines, Transmissions, Stock & Performance Parts. This Might Be the Best Porsche 914 You Can Buy. As the engine rpm increases so does the cooling fan output. There are also emissions concerns which was another reason VW switched to the water-cooled based Audi engine technology from the Porsche air-cooled designs of the 60s and 70s. Valve springs are probably the most boring part of the head but they are as critical a part as any other. $550.00. This happened because either the head of the valve distorted or the seat softened from overheating and changed shape. Note: the 79 bus cylinder head is one year only. If the deflectors on your current head are rusty like this one or missing, make a replacment. What about using parts that are more heat tolerant or seats installed to withstand higher temperatures? Lead had to go. Of course, if VW gave a damn about their aircooled engines still running today they might make a recommendation that 92 octane fuel from 2004 is factory recommended but this still has nothing to do with the rebuilder's claims. A number of years ago, AMC of Spain (Amadeo Marti Carbonell S.A.) decided to cast new heads because VW stopped. You can purchase one Volkswagen Cylinder head if needed, but most people replace them in pairs. Brooks Elliott Cylinder Heads offers only one service; the accurate, precise and correct rebuilding / modifying of cylinder heads. The gasket (~0.80mm before crush) in not the same thickness as the 1.6mm spacer VW recommends usingL. So given the facts that the lack of lead is not an issue, that most rebuilders are not improving the original design or using better parts upon inspection, what the rebuilder is saying is that he's only changed the head to deal with knock resistance of today's fuel. It's normal for the bus head to increase 100F in temperature when going from idle to fast highway speeds (this means the cooling system can't keep up). by Richard Atwell This is one of the two types of head failure that Type 4 heads suffer especially when installed in hot running bus engines. We’d love to share our thirty These springs have been shimmed on one head because the springs have worn out or the seats were cut too deep. VW dished the bus pistons (15cc on stock Mahle 94mm 2.0L piston) partially to reduce the compression ratio in order to lower the heat stress to the heads (a flat top or domed piston is not a suitable bus piston). Use the filter buttons to narrow down your search, or type the casting number or engine code into the search box to find your specific head. Every water-cooled car has a temperature gauge for the coolant but for some reason VW never installed a temperature gauge into bug, bus or any other model (you may find some mechanical gauges installed on some industrial (stationary) versions of the engine). Valves tend to suffer more than the other parts of the head. http://www.pelicanparts.com/gallery/skline, http://www.pelicanparts.com/gallery/Dave_Darling, Pelican Parts Catalog for Porsche, BMW, Mercedes-Benz, MINI and More. The contact surface between the valve and the seat surface is also important. VW 1800CC CYLINDER HEAD. The VW Bug engine and VW Bus engine will Any place the head is leaking will eventually lead to a failure. Because they assemble the engine so quickly, they do not cc the combustion chambers or make sure the deck height and compression ratio are properly set. If the seal was too tight then the friction and wear between the cylinder and piston rings would be too great and this could cause the piston to seize in the cylinder. Tech Support: roy@mofoco.com Orders: paul@mofoco.com Check out the MoFoCo Shop Tour Video! Now, grill your head rebuilder and ask him a) what kind of valve seat material he uses and b) how much interference fit he uses. Because the spark plug is conveniently accessible, you can gauge the temperature of the head by using a thermocouple crimped to a ring terminal that sits under the spark plug in place of the spark plug crush washer. Currently it has single port heads and is running with a 30-PICT carburetor. Of the various repair work that must be done to rebuild a 4-cyl VW boxer engine, THE most important aspect involves the cylinder head. Performance Workshop is owned by Steve Tims, who has been in the aircooled vw industry since the early 70's. Gearhead Engines offers remanufactured cylinder heads to fit almost any engine, including Chevy cylinder heads and Ford cylinder heads. They have a nice engine on Ebay right now they want just over 2k for it. What about the implied knock reduction ability when they use the term today's fuel? The photo below depicts a typical meltdown of a head. When overheated, the cylinder to head mating surface can distort and introduce a leak which can be hard to detect with the engine installed in the vehicle. The exhaust valve is not so lucky: instead of a cool flow of air over it, hot exhaust gases are continually flowing past. Apart from being an entirely different design, the biggest difference is that each cylinder had its own cylinder head and the cylinders themselves are made from Aluminum. The result is a growing loss of cylinder compression once the gasket burns through. Your VW Cylinder Heads are one of the key components of your Type 1 engine. ... Don't get your head work done by VW. If you've ever broken a exhaust stud boss or stripped the spark plug threads, you might want to invest the repair cost into purchasing AMC heads because these repairs can be expensive. Your VW Cylinder Heads are one of the key components of your Type 1 engine. A cylinder head rebuild starts by disassembling and cleaning the head, which Willis said is then magna fluxed for cracks ($75/pair). His office is up in Placentia, CA. Off-Road. He is in a wheel chair now and has the work all performed by different shops that he says are reliable. If there is a pressure drop and it's not caused by any of the above, then a loose cylinder seal is to blame. If you want to guarantee a long lasting head you must go to the lengths I describe in the article. In addition to power generation properties, the geometry and construction of the parts are designed to keep them cool. The combustion chamber looks burned, the valves have sunk into their seats and the cylinder lost compression at the bottom of the where you can see the fuel/oil/carbon was pushed out. Sure enough, some seats just fall out because they were previously overheated. The difference between 60mph and 70mph can mean a further increase in temps by 50F. THIS IS A QUALITY NEW CASTING WITH ALL NEW THIS HEAD FITS YEARS 99 … Oil cooler nuts came off a little too easy--some oil seepage was present in this area. Cracks in Volvo Heads – When Rebuilding Volvo Cylinder Heads is Necessary Leaks or cracks in Volvo cylinder heads can cause monumental damage to the car’s engine. New valve guides and valves as needed. Naturally the aftermarket additive producers jumped on this and introduced various lead substitutes but the fact is that auto manufacturers had been aware of this change long before it occurred. This step cut doesn't by itself have anything to do with unleaded or low octane gasoline. Sometimes when the leak is large, it can be heard as a squeak. When catalytic converters were introduced to reduce emissions, the lead coated the precious metals inside and ruined the cat instantly. Because of the cost of heads, warranties and time invested engine rebuilders are modifying the AMC heads for extra insurance because they are stating that AMC heads out of the box last 60k miles max (still pretty good but 100k+ would be nicer). Today Steve and his son Greg are building top quality cylinder heads and engines for customers around the world. There is a specific bolt pattern for each head and the torque requirements are different between T1 and T4: Heads have numbers cast into them that do not match the part numbers in the fiche. The real reason you might need a better fuel is based on your driving habits. Generally you get this for free because your head is not a VW casting but instead from AMC in Spain. Luckily VW provided the specifications so there is no guesswork required. If you have an AMC head you don't need the head gasket (AMC even gives you a warning notice with your head). The contact face between the valve and the seat is only about 1.5-2.0mm wide. Follow up from part one, Block cleaned, headgasket fitted with Hylomar, head torqued down in sequence four times. Porsche 914 2.0L AMC Performance Cylinder Heads, 42X36 "Pair" This is a brand new Set of 2 High Performance Cylinder Heads … Quality rebuilt 40hp 1200cc, single port, dual port 1600cc, type 2/4 bus 1700cc, 1800cc, 2000cc cylinder heads for air cooled VW Volkswagen Bug, Super Beetle, Karmann Ghia, Kombi, Squareback and Thing. Collect Temel's Head, Body, and Wings. While it's true that this type of work will improve the head for long term use, it has nothing to do with the fuel. The iconic VW Beetle, known by enthusiasts and the industry as the Type 1, is probably one of the most influential and underrated performance vehicles of all time. It's the only one in this price range that provides accurate digital readouts (in fact it's the only accurate gauge in this price range, including traditional analog models like VDO). Complete Your Collection With This Perfect G-Wagen. There should be an even width blue ring all the way around. You can see the intake valve in this photo has worked its way into the seat and sunken below the level of the bowl of the combustion chamber. A new head and old heat exchanger require that the tops of the exhaust manifolds be perfectly flat in order to properly seal. I miss that engine. You might discover that your head came from a 70-76 914, 1976 912E, 69-74 411/412, 72-79 Bus or 80-83 Vanagon. VW motors last half as long at best even though the working tolerances for operation are much lower. A better indicator is the cylinder head temperature. This is an outline of how we go about the repair of these heads. Engine building , Dyno and Machine services. EK 002 420 XXB: Add new set of Dual Port Performance Heads 40x35.5 with Stainless steel Push-rod tubes, for 85.5, 92, or 94mm bore. Casting part numbers are nicely covered over at Type 4 Secrets Revealed. Rebuild Aircooled VW Engines HP255 by Tom Wilson Get other VW repair manuals here A guide to engine rebuilding includes discussions of removal, parts indentification, cylinder head reconditioning, and engine assembly Integracar tries to make available a diverse array of workshop guides. (818) 767-6603 Our stock is always rotating, we The head temperature must be kept low because the hotter the parts get the more they expand and the combustion "seals" break and you lose compression. NOTE: 1200cc Cylinder Heads are not made new. Porsche engines producing these HP levels can go 200k miles before a rebuild if taken care of. VW main dealer warranty repair service. Do not fear, I have no intention of exacting revenge for the violence you inflicted upon me. A rebuilt head can be bought for $200. Rebuilt 1800 Bus & 411 cylinder head. Rebuilt cylinder heads include new valves, new valve The spring is responsible for returning the valve to it seat after the cam has finished lifting the valve off the seat. I've also been told that the valves used are not as long lasting as the originals and there is some evidence to show this. The larger intake valve (left) was bead blasted and re-used but the rebuilder didn't care that it still had something foreign welded to its face. The valve didn't seal so it overheated and stretched. Can NOT be bolted on to a 1200cc case. Some rebuilders attempt to remove the old seats by placing the head into a casting oven that can reach 400F and above. If the answer is stock or he says it's a proprietary secret, find someone who will. Power is analogous to compression: in order to turn the molecular energy of the combustion mixture into mechanical energy in the form of pressure to push the piston down the combustion chamber must make a tight seal. Now that you understand how the cylinder head is constructed it will become clear why some last longer than others. Mahle invented this plating in 1967 and you have to wonder where the 911 engines would be without it. We do not include the Mane Bearings because They warp, break, stretch, bend, etc. The head combustion cc is about 50cc on a 2.0L AMC head below the step. ). Once that is complete, Willis inspects the valve guides. Converting units, 91 RON is the same as 87 (R+M)/2 at the pump (91 RON + 82.5 MON = 173.5/2 = 86.75 octane). When leaded gasoline was in the process of being phased out people freaked out thinking their VW lead loving heads were going to fail (in fact every lead-using vehicle owner had the same reaction). The guides are made from a bronze alloy and they are lubricated by oil that is drawn from the valve covers through the clearance between the guide and the valve stem by the suction of the gases on the other side. (c) Copyright 2005-2020. By paying for this higher grade of fuel YOU are buying insurance for the rebuilder against knocking because one or two cylinders prefer to ignite more easily (higher CR) than the others. Above the step it's about 57cc. When the heads are delivered to us, the first part of the rebuilding is to establish what we are working with. If your head rebuilder is making claims that he's modified the head to take the unleaded, lower quality fuels of today think about what he is offering: In other words, the factory built head was perfectly able to run for 100k miles using unleaded fuel so that's not the issue. Heat from the combustion process is constantly being radiated to the metal parts and they will eventually fail from heat fatigue if overheated. If you've priced one of these exhaust systems, they are not inexpensive! A used head can be had for $30 or less depending on its condition. Air is pumped into the combustion chamber through the spark plug hole with both valves closed. The exhaust port deserves special mention because it is difficult to seal. Los Angeles cylinder head store. Cheap heads exist for the same reason that cheap engines and paint jobs exist: price competition which also allows unscrupulous owners to sell their vehicle more easily. $550.00. We even rebuild type 4 heads. The vin on the motor starts with AH so it's dual relief 1972 case and should be a good to use if it all checks out at the machine shop. Since vehicles require the correct shape, size, material, and quality to work properly and avoid further engine damage, when you need a new or rebuilt cylinder head, it is important to consult the professionals. They are a factor in your engine's power and cooling capacity. Leakage from the exhaust indicates a problem with the exhaust valve. EK 002 88KL: Upgrade 88mm liners to thick-wall 88K Liner for the 92 bore Heads … The VW factory changed to case savers and 8mm head studs in 1972 to solve this problem. 2nd, the heads use large valves and a hemispherical combustion chamber. :-). I'm sure there was a clever engineering solution but this complication may be the reason why VW never installed a gauge in the first place. NEW COMPLETE VW AUDI 1.9 TDI ENGINE CODE ALH DIESEL AFTERMARKET CYLINDER HEAD. 1300-1600 are interchangable. This exhaust valve stretched until the head broke off... ...the head was bouncing around the combustion chamber... ...and it beat a hole in the head of the piston before flying into the crankcase. Stem to guide clearance is important to maintain proper lubrication. They are a factor in your engine's power and cooling capacity. This begs the question: has VW also recommended lowering the compression ratio or were there further instructions? The material is much harder than the head and takes the abuse of the valve contacting the seat over and over, especially during startup on engines with solid lifters. This allowed heads to be made of low cost grey cast iron along with the valve guides. VW-Powered Porsche 944 Makes 454 HP on a Dyno. Few designs are perfect but there is an important flaw with the original design: there is a thin metal gasket between the head and cylinder and the combustion gasses can burn through and escape even though the head is tightly clamped down with the correct torque. CB Performance Racing Products has VW Performance, Electronic Fuel Injection Systems, Turbos, CNC Ported Cylinder Heads, dune buggy parts, dropped spindles, Weber, Dellorto, crankshafts, connecting rods, complete turnkey Cylinder head rebuilding, case align-bore and general engine machining and welding. When rebuilding a VW casting, it's generally thought best to start with an old VW head that has already been heat cycled many times over. Porsche 911 Type Air-Cooled Cylinder Head Rebuilding This covers all 911, 964 and 993 air-cooled cylinder heads. It’s underrated because the car only produced between 36 and 60 hp, depending on which model you had. A VW In this case, when one head gets hot, the others are probably hot as well. So, call us at (586) 757-2300 with your questions about our TDI engine rebuild kits questions. At some point the head becomes heat stressed. Not convinced? Boston Bob wrote a good writeup on VW and fuels. Find the right tools and parts to get your rebuild job done quickly and profitably. Rebuilding the engine cylinder head on your car is an involved process that requires attention to detail. Rebuilding as a practice was invented by racers who were forced to modify their parts but as the parts became unavailable these techniques were adopted to provide repair services for stock heads. Once the head gaskets are in place, install the heads, and then all of the head bolts, tightening them hand tight. More important is that the exhaust valve seals properly because if the exhaust valve overheats, it may falls off or dislodge its seat and physically damage the piston and head. Use factory VW 8mm head studs (used are fine), since they expand and contract at the correct rate, and keep head torque constant. The original heads lasted 100k miles+ but the rebuilds do not despite all their so called upgrades. Valve seat is not concentric with valve head. Last Zanardi Edition Acura NSX Sells For … There are many different companies that manufacture this kind of engines however every engine shares the same characteristics: they are complete engines ready to install once removed from the crate. What good are the modifications they've made to take the "unleaded, lower quality fuel of today" if they are telling you to move up two grades of octane? As power is lost, the engine has to work harder to maintain speed and therefore has more difficulty cooling. They did my 2.2 back in the early 80's. I need your old ones back for rebuilding. You can purchase one Volkswagen Cylinder head if needed, but most people replace This limit narrows as the engine performance requirements increase because it's an indication of the state of balance much as a compression test would indicate. Select the year, make, model, and specifications for your vehicle below using the yellow pulldown fields. 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