Ok...a leakdown check should be done on a properly warmed up engine as i understand it. What issues will arise if the engine is cold...sitting on a stand.

I assume you would see more "leakage" but couldnt you compare the results along the cylinders to spot any potential problems...like they all leak 10% but one is 15.

Nice thing is i will have the ability to listen at each individual exhaust port and intake as the engine is on the stand, should help trouble shoot anything that pops up..

thanks..
again..the tips page is a great source!!. http://www.nichols.nu/tip420.htm

 

Hmm... I'm not an expert on leak down tests, but my car currently has a leak down at the steering rack. I tested that leak down there by driving the car for a 250 mile fun drive, and then found the ps reservoir empty. So, all I can tell you is that leaks [far] down on a 928 are never good...

OK, trying to be serious now: Did your engine run before it was removed from the car? Running some hefty dose of valve cleaner might have given you better reults. What are you planning to do with the engine? Is it going to be torn apart? Stroked? Supercharged? Blown up?

Oh, and when you have a chance, please get me in touch with the realtor for the ocean front property in Las Vegas!

 

A warm test is better, but a cold test will still find gross problems.

Remember that unless you have the crank EXACTLY on TDC for that cylinder, or have the crank securely locked mechanically, the engine can suddenly turn when you pop the pressure to it - and there is a fifty/fifty chance that it will turn backwards.

 

Thanks Wally, atleast i know it isnt going to start!

 

odds are..All of the above

 

Tony,

My engine tested at 95% cold on 7 cylinders, and 88% on one. That one had a 0.007" deep scratch. 15% leak.....there is something in need of repair.

You should see low to mid 90's even cold.

 

Hey....wait for me Tony!!!