[Vwdiesel] 1.6L Diesel Compression

[Gary Bangs]

One way to get around the use of oil is to do a "leakdown" test. It is a
device that puts 100# of compressed air into the cylinder, and with some
magic that I am not familiar with, you are able to determine % leakage
past the rings and valves.

On the other hand, if you use oil, it is not 'atomized' and remains
attached to the cylinder walls(stays cool). Though it is possible, the
likely-hood that the oil will ignite is pretty low.

If you use a cheapy Harbor-Freight diesel compression gauge @$16.99, and
it does light off, who cares?


-Gary

mikitka wrote:
> One problem with putting oil in the cylinder to check for leaks, due to it
> being a diesel isn't there a concern of cylinder fireing if to much oil is
> used? Thus making it a bad day for the pressure test gage.
> 
> Nick
> 
> -----Original Message-----
> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On
> Behalf Of Doyt W. Echelberger
> Sent: Saturday, November 24, 2007 1:50 AM
> To: MikeyBigFish at wmconnect.com
> Cc: vwdiesel at vwfans.com
> Subject: Re: [Vwdiesel] 1.6L Diesel Compression
> 
> At 10:41 PM 11/23/2007, you wrote:
>> Folks,
>>
>> Anyone know what cylinder compression should read on fresh 1.6L diesels?
>> Also, what is the unacceptable level?
>>
>> Thanks, Mike in
>> VA|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> ||||||||||||||||||||||||||||||||||||||||||||||||||||||
> 
> Hello Mike...............Robert Bentley claims to know.....quoting from 
> my  Jetta/Rabbit Diesel Service Manual... 77-84:
>> Compression should be between 398 and 483 lbs per square inch (psi).
> Difference between any two cylinders should not exceed 71 psi.
> Low pressure in adjacent cylinders may be due to a leaking head gasket.
> To determine if low pressure is due to rings, squirt SAE 40 motor oil into 
> the cylinder through the injector hole and repeat the test. If readings 
> then are higher, the rings are faulty. If the readings are still low, 
> suspect faulty valves or a leaking head gasket.
> 
> Doyt in Ohio
> 
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