leak down test

S

saladbar

Junior Member
Have trouble with tdc the motor will rotate when air is turned on. 3 plugs installed in gear and brake on. tried bottom dc cant get valves shut. All help is appreciated thanks John
 
How much air are you supplying? Only need like 10psi. Set the parking brake hard in 3rd gear.

Take the plugs out as you wont be able to detect if it blows into the next cyl.
 
I don't think 10 psi is enough, 75 -100 psi is more like it. I even leak engines down on
the engine stands,...you just need to make sure your on TDC...
 
thank you all pulled head. Where are the most likely places to look for cracks in block and head thanks John
 
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