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Self performed compression test

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Old Dec 23, 2004 | 02:48 PM
  #1  
DsDw40's Avatar
DsDw40
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Joined: Sep 2004
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From: Conn.
Default Self performed compression test

Guys,
My search has narrowed down to an '86 targa & an '86 cab(same price,targa 25K less miles). I'd like to think I know good from bad as I've viewed & driven several 911's in my 3-4mos search. As the spark plugs are relatively easily accessible, why not perform my own compression test? As far I'm aware,this test consists of merely removing each plug & screwing in the tool, turning the car over & reading the results. Please correct me if I'm wrong. I'm thinking this is the way to go. My only concern is the lack of a professional test drive to rule out any tranny &/or linkage issues. I have appointments set up for next week, your responses are appreciated.

Dave
(owner to be)
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Old Dec 23, 2004 | 03:15 PM
  #2  
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an6drew
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From: san francisco
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A compression test only tells some of the story. A good PPI performed by an independant Porsche shop examines hundreds of other issues/items. If you are VERY familiar w/ these cars (owned & worked on them for many years) a self-PPI is possible, otherwise definitely get a good shop to look at it.
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Old Dec 23, 2004 | 09:24 PM
  #3  
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jet911
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From: SLC, UT
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I agree with an6drew, however if you do want to do it yourself, you should prepare a check list to ensure you don't forget anything. If I remember right, there is some sort of pre purchase check list either on this board or Pelican. Do a search and check out Rennlist and Pelicans tech articles there may be something there. Also, PCA may be able to help with a list. You may want to check their web site.

Good luck!
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