low compression--what is it?

[green536@hotmail.com (Chris DeLong)]

put the plugs back in, go flog the hell out of it, bring it back in and do 
another comp test. it is possible for carbon deposits to get stuck between 
the valve and the seat. flogging it will hopefully get rid of any pesky 
carbon deposits and yeild a better comp test. oil on the threads usually is 
from undertightening the plugs.. HTH



Chris DeLong
ICQ#45030867
Seattle, WA USA
'80 16V 'Rocco ragtop
'91 GLi 2.0 16V (for sale)
'77 Rabbit 16V
'61 17 Window type II
'91 Vanagon
'84 Jetta





>From: "Michael Abatzis" <abatzis2@hotmail.com>
>To: scirocco-l@scirocco.org
>Subject: low compression--what is it?
>Date: Tue, 18 Feb 2003 23:02:32 +0000
>
>i've had an oil leak of unknown source for 3months, and have recently been 
>noticing poor power. finally cleaned the engine last week, and despite 
>losing 1/2 qt of oil, the outside is still clean. i did a compression test 
>today, with the following results:
>
>215/220/230/100
>
>yeah, the gauge has always read high (210-220 has been average across 3 
>engines), but obviously #4 is the concern. plug threads were oily, but 
>plugs themselves weren't fouled. pistons from what i saw were gunky.  wet 
>compression raised #4 to 170, but 1/2/3 also increased by 40-50 psi, so i 
>don't know what to make of that. coolant has no oil in it.
>
>so, what's up? head was replaced (with hg) maybe 6 mos ago, and had been 
>recently redone apparently (brett c?). i'm thinking headgasket v. 
>stuck/dirty valves v. leaky valve guides v. (less likely) rings/other bad 
>stuff. any ideas, or how to better eval? btw, my car is way worse than 
>yours cathy.
>tia,
>
>
>-Michael Abatzis
>Hotlanta! GA
>1988 Scirocco 2L 16v RIP-->parting, finally taking orders: 
>www.learnlink.emory.edu/~mabatzi/mikes_page1.html
>1987 Scirocco 2L 16v...
>
>
>
>
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