TYPE 4 ENGINES
After the "shortblock" is built- the next issue is the Compression Ratio.. This is an "extremely important" step. If not done perfectly- this will lead to catastrophic failure of your engine.. Personally, I strive for a 7.5 to 7.9 CR for my engines..
Once the old engines are all apart, I send them off to the Airport Machine Shop for cleaning in a special chemical vat for aluminum and magnesium. Afterward they come out clean as a brand new part.
Setting the crankshaft end-play is very critical, and I always use a resurfaced flywheel
The VW Bus Pancake Engine (also known as the Type 4 Engine) was originally installed in the
1972 through 1979 VW Type 2's.. and from there it was used in the Vanagon's thru 1983..
The phots above show what the engines look like when they come into my shop after 100,000 miles.
FINISHING THE COMPLETE ENGINE
A completed Type 4 "longblock" is a beautiful thing.. I really enjoy building these Type 4 engines.. Not to mention the fact- that it is a much better engine assembly than the Type 1.. Notice the new "oil cooler" that I install on all of my engine "longblocks"..
In the above pictures please note the internal components all "balanced" and the "oil galley plugs". I use special aircraft plugs. Nothing is too good for my rebuilds. After all I am building 100,000 mile engines with some parts that are over 40 years old.
The clean block above has been align-bored by me with my special-made boring bar that cost $3800.oo.. All "high mileage" Type-4 blocks "must be alignbored".
How I rebuild a Type 4 VW Engine