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Registered
Join Date: Feb 2002
Location: Washington State
Posts: 35
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Assessing condition - before teardown
Can an accurate comrpession check be done on an engine while on a stand, being spun by hand? (or doesn it have to be spun faster - by a starter?)
I'm trying to assess the condition of a recently purchased motor and don't want to tear it down if it isn't necessary. Suggestions much appreciated. Thanks in advance. -Ben M. |
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Registered
Join Date: Feb 2002
Location: Washington State
Posts: 35
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Ok, while waiting I went and read up on leakdown tests. I was surprised at the simplicity - always figured it would be complicated. So, I'll do a leakdown test this week and report back (if anyone is interested).
-Ben M. |
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Banned
Join Date: Feb 2003
Location: So California
Posts: 3,787
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Answer to first question. NO you cannot do a compression check without a starter. A leakdown test, yes, but remember you are not at operating temp so something may be a little off, but NOT al whole lot. If your leakdowns are under 35% I would suspect everythings good. You can determine if the leakage is valve, rings. If its valve, do a valve job, if its rings, and under 35% I would wait and run it for a while.
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Author of "101 Projects"
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Right-o, I agree with Jack (hmmm).
-Wayne
__________________
Wayne R. Dempsey, Founder, Pelican Parts Inc., and Author of: 101 Projects for Your BMW 3-Series • 101 Projects for Your Porsche 911 • How to Rebuild & Modify Porsche 911 Engines • 101 Projects for Your Porsche Boxster & Cayman • 101 Projects for Your Porsche 996 / 997 • SPEED READ: Porsche 911 Check out our new site: Dempsey Motorsports |
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