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SPOV
Samba Member
Joined: December 19, 2008
Posts: 14
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 Posted: Sat Dec 20, 2008 10:51 am Post subject: I am doing a compression check....what is normal pressure |
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| 1600cc vw baja was blowing smoke...this newbie does not have a chiltons/hayes repair manual...I am checking for compression at the spark plug....what is normal pressure for a 1600cc air cooled motor... |
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26306
Location: Douglas, WY
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| Posted: Sat Dec 20, 2008 11:11 am Post subject: |
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| SPOV wrote: |
| this newbie does not have a chiltons/hayes repair manual...I am checking for compression at the spark plug....what is normal pressure for a 1600cc air cooled motor... |
Be glad you don't have a Chilton, their aircooled VW manual is horrible.
Haynes and Clymer are a little better. The John Muir "How to Keep Your Volkswagen Alive for the Compleat Idiot" is also a good start for newbies. Then move up to the factory repair manuals.
Speaking of which, compression specs on the 1600 engine, from the Robert Bentley Official Service Manual: (the reason the numbers are lower starting in model year 1972 was because they lowered the compression ratio)
That's at sea level, numbers will be lower at higher elevations. And despite the 85lbs wear limit, usually anything under 100PSI is considered pretty worn out.
-Andy |
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SPOV
Samba Member
Joined: December 19, 2008
Posts: 14
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| Posted: Tue Dec 23, 2008 4:30 pm Post subject: proper compression ....try tightening the sparkplug |
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my original post was asking the proper compression.....i found out there is no easy way to get a compression tester tight into where you screw in the sparkplug....looks like you need to take off all of the sheet metal shrouding to get a wrench on the compression tester....
good news is I found my sparkplugs were loose....so i tightened them up and she runs just like before...don't I look like a fool...
NewB SPOV |
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HyDr0
Samba Member
Joined: December 17, 2008
Posts: 195
Location: Sunny Az,
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| Posted: Tue Dec 23, 2008 4:37 pm Post subject: |
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SPOV,
Could have been worse 
Glad ya got it fixed
_________________
-Will
1961 (o\ ! /o) |
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26306
Location: Douglas, WY
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| Posted: Tue Dec 23, 2008 5:19 pm Post subject: |
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| I've never needed to screw a compression tester on "wrench tight" to get the tester's O-ring to seat. Just as tight as it'll go by twisting the tube. |
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KTPhil
Samba Member
Joined: April 06, 2006
Posts: 33986
Location: Conejo Valley, CA
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| Posted: Tue Dec 23, 2008 6:34 pm Post subject: |
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| glutamodo wrote: |
| I've never needed to screw a compression tester on "wrench tight" to get the tester's O-ring to seat. Just as tight as it'll go by twisting the tube. |
X2. I just lube with a little anti-sieze and twist the hose tightly. |
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