for regular gas engines, 100 psi has traditionally been considered
borderline.
With luck your engine will have something like 125, 120, 115, 130 .........
I find many of them to have one low cylinder, often # 3.
I wouldn't expect to see higher than 135 to 140 at the very most.
a 90 wouldn't surprise me...........it's just a vw after all......
and I find many waterboxer exhaust valves leaking.
I almost always do a minor valve job at least with a head gasket job.

there's one 'real trick' to figure out in the Bentley wiring diagrams.....
is how to follow to the next wire when you see a wire ending in a box with a
# in it.
Other than that.....
pretty straight forward.
Scott
www.turbovans.com
----- Original Message -----
From: "Mark A Kippert" <vanagon@KIPPERT.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, December 11, 2008 1:54 PM
Subject: What's considered good compression on a 2.1L?

> I'm going to be working on my Vanagon this evening. I plan to replace
> plugs and thought I'd check cylinder compression. The PO didn't know
> the engines history and with over 200k miles I'd like to know it's
> overall condition. What is factory compression and what is considered
> acceptable? I don't have my Bentley to check it at the moment and
> besides, I need to take a class on Bentley usage to fully understand
> it's usage (and believe me I've spent hours just trying to trace a
> wire in the wiring diagram).
>
> Thanks!
> -Mark
> '86 GL, 2.1L, 4spd
>
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