Did a compression test on my 98 Toyota Camry, not expecting what I found out.
Cylinder 1: 110 Cylinder 2: 50 Cylinder 3: 180 Cylinder 4: 180
I retested a few times on #1 and #2 to make sure I had the hose screwed in tight and all the way.
Now I am thinking of doing a leak down test but is it really necessary to get an air compressor for the air source? What's the minimum psi that would be able to perform such a test? Should leakdown test be performed with cylinder at TDC or BDC (I've seen both suggested, BDC so that engine doesn't turn over)?
I think the important thing is the variation amongst the cylinders, not the actual readings so much because with a 2 foot extension air hose connected to the guage, the readings all drop by alot. My top readings go to about 80 psi. Other than that, I'm not sure what could be causing the low compression on #1 and #2.
I haven't ever seen coolant in the oil or oil in the coolant, but I have noticed a small coolant loss that must be replaced about once every week and a half or so, about 20 ounces or so into the expansion tank.
The car seems to run fine, although I think it doesn't have quite the acceleration that it should - my only indication that the low compression really exists and not just on a gauge but again, is this a problem that will get worse and worse until fixed?
Thanks.