You mean compression tester?

Leakdown test:
1. Check compression
2. Add a little oil directly into cylinder
3. Check compression

If the compression rises, than the rings are probably a little worn (the oil seals the rings). If the compression stays the same, than you may have a blown headgasket or bent/dirty/stuck valves.

Seeing how your compression wasn't that bad (2 normal, and 2 within 10%), and the 2 within 10% were side by side, I would suggest going to a Honda OEM headgasket. Also, check to make sure the head is not warped.

I assume this is due to your overheating problem? Have you checked the water temp sensor or all the grounds?

Charles

 

Blown headgasket is the only real indicator, but just becuase you may have a blown headgasket doesn't mean you have a warped head. A warped head is usually easily fixed by milling it.

A blown headgasket can also be caused by stretched headbolts.

If you have no oil-water or water-oil transfer, and the compression is 190-180-180-190, I don't think you have much to worry about. I still think the overheating problem is either electrical or a bad sensor. Water temp gauges don't normally act that funny. You need to goto Discount and buy yourself a REAL water temp gauge and install that. That would be a true indicator.

The fact of the matter is, you still don't know if the car is truly overheating or not...figure this out first, then worry about why.

Charles

 

that ain't a leakdown test... :o

 

a leakdown test is performed on each cylinder one at a time. the cylinder being tested is turned to the very top of its stroke. the spark plug is removed and a pair of gauges(one that reads air pressure and another that reads leakdown %) with an adjustable valve is hooked up to a compressor hose and another tube coming out the other end of the gauges is screwed into the spark plug hole just like a normal compression tester. then pressurized air from the hose is forced thru the gauges and into the combustion chamber(everything should be sealed in the combustion chamber when its at the top of its stroke). one gauge will read a steady amount of pressure while the other will tell u the percent of air that is leaking by. it should normally be like 5-10%max. hope that helps. goodluck