Volkswagen Beetle Engine Serial Numbers

Digit 7 and 8: Volkswagen's Vehicle Descriptor Section. Many of them are consistent with VW's old model type system, so you should spot some familiar numbers here. The most common Volkswagen combinations are: 11 - Beetle (Brazilian, Mexican, Nigerian) 13 - Scirocco 3 14 - Caddy Mk 1 (European Golf 1 pickup) 15 - Cabriolet (1980 Beetle, Golf 1).

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• Vw Beetle Engine
• Vw Bug Engine Serial Numbers

In his excellent article 'The VW Beetle - Changes Through the Years', Rob has provided a listing of the VW model years since 1940 in which he gives the chassis numbers, the engine numbers, and the changes to the car in that model year. This listing is very useful in determining the model year and original capacity given the chassis and/or engine number.

To determine what type of engine you have, first determine whether it is the engine single-port or twin-port (the term 'dual-port' or DP is used in the US). The single-port intake manifold consists of a single tube running from head to head across under the carburetor. There are smaller diameter heat riser pipes from the muffler on either side, attached underneath the intake manifold in the center. The two sides of the intake manifold combine in the center with a tube extending upwards to a flange upon which the carburettor rests. The intake manifold on twin-port engines is similar, except that the horizontal intake manifold tube splits at each end with the end pieces turning downwards to the cylinder heads. Vmware fusion 7 1 2 keygen for mac. The twin-port intake manifold is in three pieces - the center section with the cylinder head connection sections attached at each end of the centre intake tube.

Twin-port engine first came out in 1971, but the earlier cases can be converted to twin-port, so it's not always easy to tell exactly what you have unless you know the engine's history.

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The engine number is stamped just under the alternator/oil filler stand (under the 'zunfolge 1432,' which means firing order 1432 in German).

At first VW used a styraight number for the engine number . By 19561 this number had reasched just under 3.9 million with the 36hp 1200 engine, and in that year they introduced the first 40HP 1200 engine, so started a new number sequence stafting with % million for the 40HP engine, leaving enough numbers for the 36 hp engine (still an option) to continue into the 4 millions. Then in 1966 they introduced a co,mpeltley new system ,withy an initial letter denoting the enigne size - D for 1200, E for low compression 1300, and F for huigher compression 1300. In 1967 there were no less than 5 different engines options in various places in the world, noted by their iniitial letter - D(1200), E(1300), F(1300), H(1500) and L(1500).

In 1970 the first 1600 engine (single port) was fitted to Bugs - B6 engines. B5 1600s had previously been used in buses and Kombis in 68 and 69.

In 1971 the twin port (dual port) engines were introduced and they all got a two letter prefix. Both 1300 asnd 1600 versions were available, but the USA once again only got the larger 1600, where other countries still had a choice of 2 (1300/1600) or 3 (1200/1300/1600/) engines.

The following table from the Haynes Manual gives a summary of engine types, numbers and horsepower over the years.

*Dual-port version

- Table courtesy of Haynes Automotive Repair Manual, VW Beetle & Karmann Ghia, 1954 thru 1979 Models, with additions from Rob Boardman.

The single port engines make a little less power and can only use the smaller 30 series carburetors or the modern replacement H30/31, but are considered a little more torquey, and are popular with off roaders. The twin port engines can make a little more peak hp as they use the larger 34PICT/3 carburetor.

Most 'stock' engine rebuilds these days use 1600cc pistons and cylinders (P&C)s, as these are readily available and will also fit straight into the 1300cc and 1500cc cases, without any need to change anything but the heads (even these can be left original if you can live with the higher than normal compression ratio). Smaller P&Cs are very difficult to find these days. SO most VW rebuilt engines now are at least 1600cc. Then there are the oversized P&Cs and stroked crankshafts which will give a range of new capacities -- 1641cc, 1776cc, 1835cc, 1916cc and so on up to about 2235cc. Anything bigger than 1776 will probably have a larger (non-standard) carburetor or twin carburetors, as the engine won't breath well on large capacity with the smaller Solex carburetors.

AB Series Engine Numbers -

Someone wrote asking for help with determining the date when his engine was made. His engine number is AB 201915.

Rob responded -- Your engine is probably late ‘71 rather than early ‘72 - just going on the total engines built vs the total chassis built in each year. VW always built more engines than chassis (for replacements), but assuming the missing engine numbers were '71 rather than '72 makes for a more even spread of engines vs chassis.

It's interesting to see that Canada got the 1300cc engines - the US was almost entirely to 1600cc engines from '67 onwards. The rest of the world still had 1300cc engines up to and including '86. I don't know if Canada followed the same pattern as Australia, but from '71 onwards in Australia, 1300cc engines were used in standard Bugs and 1600 engines in Superbugs. It's easy to pick one from the other from the back of the car (without seeing the bulbous front) - just look for the eyebrow vents to make it ‘71+ and then at the engine lid badge - 'VW 1300' makes it a standard Bug, and 'Volkwagen L' or 'Volkswagen S' makes it a Superbug.

It was the pattern for the USA to get only the biggest engine for each year, and the US models stayed with drum brakes. The rest of the world got at least 2 and sometimes 3 choices of engine size , and from 68 onwards the 1500/1600 cars got front disc brakes as standard. In the USA only the Karmann Ghias from 68 onwards got the (identical) disc brake set-up.

AH Series Engine Numbers -

Someone wrote asking about the year for an engine with the number AH398208.

Rob responded - Our engine number list shows the AH series as a low compression version of the 1600cc engine, used in the US in '71 and '72. The top number in our list is 114,000 which is less than your number so it's possible it was sold in some parts of the world but not others, into 1973 too.

If it's got it's original cylinders and pistons (which is doubtful) then they would be dished pistons to reduce the compression ratio so it can run on low octane fuel. If it now has flat topped (normal compression) pistons it needs 87AKI octane fuel (in the USA).

How can you tell? - the only sure way is to remove a cylinder head and look at the piston tops, but you might get some idea from the compression - a normal-compression 1600cc engine will give over 130psi, a low compression version will probably be a little less than that, but since ALL engines lose compression as they age it's not a definitive test.

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The 1969 VW had either the H series 1500cc, a few L series 1500cc (smog - probably sold in Cal), and in other parts of the world, the E and F series 1300s and D series 1200s.

Does your engine have the doghouse oil cooler (a box on the FRONT side of the fan shroud to the left of center)? https://negneysunchi1975.mystrikingly.com/blog/fujifilm-image-memory-card-reader-dpc-r1-driver. If it does, it's quite possible the engine will run a little hotter than it needs, as this version of the cooling system has a larger fan and needs a slotted engine lid to get enough inlet to prevent it running short of cooling air at higher speeds.

The 2-slot '70-'71 model engine lid, or the 4-slot '72+ lids are interchangable with the 68 and 69 solid lids.

AU Series Engine Numbers -

Someone wrote asking about his engine with the number AUxxxxxxx. He could not find an engine number begining AU. He also wanted to know about engine number series for Volkswagens made in Brazil.

Rob responded -I haven't seen or heard of any engines starting with AU - very strange.

I wonder if it's a rebuilder's ID - added when the engine was rebuilt - although then I suppose it should be something like AUDxxxxxxx or AUFxxxxxxxx, (before the normal D or F etc) so I don't really know.

Another possibility is that it's a case originally used on a VW industrial engine - I don't have the number series for those (VW built millions of 1200 and 1600 industrial engines).

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I don't have the number series for Brazillian or Mexican made engines either - I'd love to know those.

F Series Engine Numbers -

In response to a question regarding F series engines, Rob wrote -

The F series engines were originally 66-70 1300cc single port engines. But that case can have 1500cc or more likely 1600cc P&Cs plugged straight in (1500cc P&Cs are almost impossible to get now). You can actually still use the 1300cc heads but they must be fly cut for the larger cylinder tops (the cylinder bottoms are all the same for those three sizes, but the 1300cc cylinder tops are smaller on the outside at the top). You'd have high compression - about 8.4:1 but it will work (with higher octane fuel). Or you get a set of 1600cc single-port heads and then you an engine similar to the 1970 B series 1600cc single-port.

SFD Engine Numbers -

Another question from a guy building a Spyder replica. His engine (1600cc or 1300cc - he wasn't sure). The engine number is SFD022728, which does not fit into any of the standard numbers on the net. He wanted to know whether SFD is an authentic number and how to determine the size of his engine.

Rob responded -- I haven't heard of SFD numbers. Is it possible an engine builder has added his own stamp to the engine number? I've seen an X or other letter added after the number by some rebuilders so they will know which engine rebuilds are theirs.

The only sure way to check the capacity is to remove the head on one side and take some measurements. 64mm stroke and 77mm bore is 1200cc, 69mm stroke and 77mm bore is 1300, 69mm stroke and 83mm bore is 1500, 69mm stroke and 85.5mm bore is 1600.

The heads can be either single port or twin port - the twin port heads came in 1971 - and are in only two sizes of TPs - 1300 and 1600 (1300 TPs were not sent to the US).

It's very easy to mix-n-match parts on VWs so you could have an early engine, or a later engine retro fitted with SP heads and a generator.

The single-port engine is a 'torquey' engine - for the same capacity they pull better at lower rpms than the twin-port engines, but the twin-port engines make more total horsepower (at slightly higher rpms).

For information, if you have a single-port engine, you can not use the larger 34PICT/3 carburettor. The single-port manifold has a smaller flange and accepts the 30 series carburettors or the modern replacement H30/31.

The H30/31 (with the right jetting) will work well with any engine from 1200cc to 1600cc. So will the 30PICT/2. SOme of the early 30PICT/1 will work OK with the 1500cc and 1600cc capacities, and some won't. The first 30PICT/1s do not have a power jet, which is OK for a 1300 but it will run a 1500 or 1600 lean (hot) at high rpms/highpower. The later 30PICT/1s do have a power jet and can be used with a 1500/1600sp engine.

U Series Engine Numbers -

Vw Beetle Engine

Someone wrote about his engine having the number of U0091519, wanting to know details about the engine.

Rob responded -The U series engine numbers were used on the Type 3 cars - Notchback, Squareback and Fastback. The U series were 1600cc twin port. Those engine numbers are not included in our Web site, as our site is directed to the Type 1 Beetle.

Your engine could be still in it's original Type 3 format (pancake - lowered cooling shroud with the fan on the crankshaft), or converted to the upright-cooling Bug engine.

They are almost identical to the Bug case, and make fine cases for rebuilding engines in either format.

The main difference is that the original case had no oil dipstick near the engine pulley, so when converting it to the Bug format, usually one needs to be manufactured using a black plastic adaptor (which can be bought from some Bug places) bolted to the back of the engine to the right of the engine pulley.

The oil cooler was laid flat on top of the case in the Type 3, so the Bug style oil cooler adaptor must be used when it's rebuilt into a Bug's upright cooling shroud. They also had the original 'cool tins' - close fitting tinware under the cylinders to help with the more convoluted cooling-air path. (These cool tins can be also used on the Bug engine in place of the under-cylinder deflector plates). Other than that - it's the same internals as the 1600cc tp engine used in Bugs, so Bug engine parts will fit.

Note from a source we trust - Cool tins have been tested and it has been proven that they do not work well with the Type 1 fan and cooling components. It was more of a 'hey we have a warehouse full of these, lets market them' gimmick than a real solution.

Vw Bug Engine Serial Numbers

For more info on the Type 3 engines (and Type 3s in General), visit Dave Hall's Web site in the UK - Type 3 & 4 Club.