Quote:
Originally Posted by PeteKz
The crank pulley has marks 120 degrees apart that indicate when the pistons are at TDC. The remaining question is when each piston is at TDC at full compression. That will become obvious when you hook up the leakdown tester.
Next item: The leakdown test may not tell you where the oil is coming from. Specifically, if the intake valve guides or seals are leaking oil, you will measure more or less normal leakdown numbers. But let's see what the test shows.
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This was useful info. Thanks. I found a diagram that labelled all of the crank pulley marks for a 2.7L so that expedited things. I also watched a vid of a kooky lady in a sun visor starting the breakdown of her 3.2L engine. She had a good explanation of the methods and using the pulley marks.
Before I relay the leak down test results, let me say I believe the testing situation is less than ideal. If there is a consensus to repeat it properly, I will do my best to do so, but I'll need a little more time. Suboptimal conditions include that the engine was not warmed up AND for whatever reason I could not get the leak down tester to pressurize more 30 psi while keeping the leak down % gauge in range. I'm tempted to get my own that has pressure in and pressure out and calculate the % loss myself. Anyone have recs?
The results:
#1 - 25%
#2 - 20%
#3 - 15%
#4 - 25%
#5 - 30%
#6 - 37%
Regardless of the conditions, I don't like #6. Of the old plugs I removed #6 and #4 were the most wet and gunked.
Relatedly, since I had a pin spanner on hand for the fan pulley rotation, I took the opportunity to start the exchange of a new belt, because the old is cracked. Anyone have any tricks for getting the spacers and nut back on, aligned, and appropriately tightened????
If it's not one thing, it's another...