Acceptable cold Leakdown values?
03-03-2018, 11:08 AM
#1
2nd Gear
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Acceptable cold Leakdown values?
I just had a PPI completed on a 1990 964. The car produced the following values. Advice would be very much appreciated. Thank you.
Leakdown (cold): #1-7% int, #2-15% rngs, #3-11% rngs, #4-8% rngs, #5-15% rngs, #6-14% rngs.
Leakdown (cold): #1-7% int, #2-15% rngs, #3-11% rngs, #4-8% rngs, #5-15% rngs, #6-14% rngs.
03-03-2018, 01:43 PM
#2
Rennlist Member
Why cold and not hot? anything between 5 and 10% warm is usually fine. Lower is great but usually not realistic. If your paying for this I would have them redo it warm as these numbers are high but most likely because the engine is cold.
03-05-2018, 12:38 PM
#5
03-05-2018, 02:27 PM
#6
Rennlist Member
Then they should be able to explain the numbers and where the leakage is occurring. Intake valves, exhaust valves, valve guides, piston rings, head gaskets, etc and why the numbers are so high and why they feel it is acceptable or not. If not it is time for a new shop.
