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#3 cylinder comp and leak down results suspect?

Shareing my results for a prospect 1988 911 3.2 for any feedback from those that might know a thing or two based on the numbers alone.

Car currently has 55k miles on it and has been driven less than 1k miles per year on average between 93’-19’ by it’s current owner. It has sat undriven regularly for the most part over the last 10 years. Seems to perform well and power feels strong and consistent through  all gears. Engine is also very dry.

Results from the PPI are:

Are these compression results acceptable?

My compression test results were, by cylinder: 150, 125, 150, 150, 150, 150, 150. The car runs beautifully, pulls strong, no issues at idle. Are these numbers acceptable?

Loud Noise coming from Engine ?

I have owned my 1989 911 Carrera for 8 years . I have had a mystery sound coming from the engine, now about 5 times in that period of time .

It sounds like it is coming from the Fan Housing , like fan blade is hitting something . But it goes away when warmed up.

Like I said it has only happened a limited amount of time . The First time was about a month after I made the purchase ( gulp )  

My mechanic could find nothing . About 2 months after that it came back , but again went away .

Loud Noise coming from Engine ?

 

I have owned my 1989 911 Carrera for 8 years . I have had a mystery sound coming from the engine, now about 5 times in that period of time .

It sounds like it is coming from the Fan Housing , like fan blade is hitting something . But it goes away when warmed up.

Like I said it has only happened a limited amount of time . The First time was about a month after I made the purchase ( gulp )  

My mechanic could find nothing . About 2 months after that it came back , but again went away .

HOW TO CLEAN INTAKE VALVES STATIONARY IN SITU

Am replacing engine compartment fuel lines, and intake manifold gaskets/spacers while in there. Injectors sent to the cleaners. Engine in car. Cylinders 4-6 intake valves exhibit varying degrees of tarnish to slight build up; no caking. Intend to clean them.  I do not have access to a walnut blaster. Am considering cleaning the intake valves one-by-one using a retail aggressive solvent for fuel systems.  To prevent cylinder/oil contamination I intend to bring each cylinder to TDC, spray the solvent, let it work, and remove residual as necessary.

Best upgrades during a top end rebuild

Recently discovered I needed new head studs during a valve cover gasket change. While the engine is being rebuilt, which headstuds would be the best replacements and which other preventative maintence should be done while the engine is out? 

Loss of Oil pressure

Hello,

I have recently rebuilt my 3.2  in my `84 carrera. Upon initial start up oil pressure is fine, as the oil temp comes up the pressure decreases. 30-50 psi when on the throttle , 2-5 at idle......  Engine all new, rods, bearings, etc.   I have replaced oil pressure valves in my troubleshooting process & no change.  Could I have a bad tensioner ?  ( they were not replaced ) & probably the last oil related piece to access without tearing down...  Thoughts ??  Thank you for your time.

Ron

 

 

 

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