300u compression at 85psi

Posted by Duane on July 15, 2001 at 07:38:40 from (142.165.70.20):

Doing some tune up work , This old girl has never had engine work done at all, blows no oil, and works quite easy in 2nd gear with a bottom plow breaking new ground. So , with compression on all 4 at 85psi, each cylinder coming up hard and fast on the first compression stroke, leads me to believe its just old age? I am guessing the factory specs were around 120 or so. That means a loss of 20 % compression over 45 years. No symptoms at all seen other than spark plugs on cylinders 2 and 3 have a mild carbon deposit, dry and flakey, if it on all 4 I would assume a rich fuel mixture, but whats going on with only the 2 cylinders? Would you guys leave the compression issue alone until syptoms show up and what is your low ball number for psi, before doing the engine?

Follow Ups:

• Re: 300u compression at 85psi Steve Wisnewski 14:10:09 07/16/01 (1)
  • Re: Re: 300u compression at 85psi Duane 14:17:52 07/16/01 (0)
• Re: 300u compression at 85psi Kendall 09:47:54 07/15/01 (0)
• Re: 300u compression at 85psi Ralph 08:35:07 07/15/01 (0)
• Re: 300u compression at 85psi dick 08:18:13 07/15/01 (0)

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