Compression checks should be done hot. This way all components have
expanded to their limits and the condition of the fits and clearances
will express themselves properly in the outcome of the numbers.

Regards,

John Rodgers
88 GL Driver

Shawn Wright wrote:

>As an experiment, I did a compression test on my '88 2.1L from dead cold
>tonight; engine has not been started since November. Readings were as
>follows: 135-135-90-125. The 90 surprised me, as the engine starts and
>runs very well.
>So I then put the plugs back in, started it, and ran for about 2-3 minutes to
>warm the oil. I then re-checked the two low cylinders (right hand bank) and
>got: 130-155. Is it typical to see a wide spread between cold and warm/hot
>readings? What possible causes are there for this? Lifter bleed down?
>(they didn't make any noise at all, even after sitting for months, thanks to
>Amsoil synthetic!). The engine wasn't even hot on the 2nd reading, just
>warm.
>
>Just curious...
>
>ps: This is the engine I will be selling in a month or so, once I get my diesel
>conversion parts lined up. If you are interested, and want to drive it before I
>pull it out, please contact me for details. (near Victoria, BC.)
>
>Thanks
>Shawn Wright
>http://zuiko.sls.bc.ca/~swright
>'85 Jetta TD (retired)
>'85 Jetta D
>'88 Westy 2.1L
>'82 Diesel Westy
>
>
>
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