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Pinto Car Club of America

Welcome to FordPinto.com, The home of the PCCA => General Help- Ask the Experts... => Topic started by: tbucketjack on February 23, 2013, 01:45:11 AM

Title: Compression Ratio
Post by: tbucketjack on February 23, 2013, 01:45:11 AM
I just did a compression test on my stock 1971 2.0. I got: 145, 147, 145, 145 on a warmed up engine. Then I did the wet (oil) test and got:   145, 152, 145, 150  I normally get blue smoke on start up and she will puff out sometimes while idling. Is this compression too low? Could the smoke be from valve guides or the seals? Thanks     
Title: Re: Compression Ratio
Post by: wbacon8780 on February 23, 2013, 04:20:05 AM
Valve seals will cause the blue puff. Seals are no good and oil gets by them and leaks into the cylinder, when you start it you get your blue puff.
Title: Re: Compression Ratio
Post by: fast64ranchero on February 23, 2013, 12:14:39 PM
As stated above, it's valve stem seals, The  2.0L has a flooded top end and the valve stem seals are an issue if old or not installed correctly.
You can do them without pulling the head by making a fork tool to compress the valve springs.
Title: Re: Compression Ratio
Post by: D.R.Ball on February 23, 2013, 08:34:02 PM
Your compression is fine , change your valve seals.......
Title: Re: Compression Ratio
Post by: tbucketjack on February 24, 2013, 12:51:52 AM
Just want to thank you for the inputs. Valve stem seals it will be. Thanks again. :)
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