Hi all,
Had a local porsche mechanic do a compression and leak down test on my 78 Cali with 188000 miles on the odometer. The guy who I bought the car from didn't have squat information or receipts on what had been done to the car. (Long story). Any, it's been running now and I am going through it. Getting ready for my first engine drop and plan on addressing a a lot of things while the engine is out. Distributor rebuild, rear main seal, thermostat seal, vacuum lines, coupler, valve adjustment, turbo valve cover, oil cooler washers etc. pretty much everything mentioned in Wayne's book as far as addressing common oil leaks.
What I am looking for are your opinions on my readings for compression and leak down.
1- 150. 5%
2- 150. 5%
3- 150. 5%
4- 140. 14%
5- 150. 5%
6- 150. 5%
He also drove the car for a while and said it drove strong and thought it was fine.
His opinion on cylinder 4 was a possible valve out of adjustment and thinks if I address that it will probably address the variance in the reading for cylinder 4.
I don't know if the engine has ever been rebuilt or the new timing chain tensioner s installed, although I plan on checking when I have the engine out.
What I would like to hear back from the brain trusts on this board are do you think the mechanics explanation for the cylinder 4 reading is plausible?
A motor with this many miles on it, is it reading mileage appropriate?
Any other things to look for or check while I have the motor out?
Thanks for you input.
Gary
