Loss if compression on cylinders 1 & 2
Hi guys this a bit puzzling, I was racing my 14se at the weekend. Previous to racing all four cylinders were equal at 200psi, I check the pressure after it failed and I had 1) 30psi 2) 30psi 3) 200psi 4) 200psi. And there was pressure in the breathers. I've took the head off the gasket is fine, I've poured oil in the bores and there not passing. The only thing I can come up with has the head warped or lifted due to the comp stil being in the oil ways.
Any suggestions please guys.
Valves lifting/leaking?
All I wanted was a Pepsi, just one PepsiFar from suicidalStill I get them tendenciesBringing back them memories
That I really miss when I reminisce
The valves have been questioned I had a quick look and the there was no obvious bent ones and they looked ok but I sort of rules them out as all the pressure seemed to be oil ways and breathers.Originally Posted by Benn
pressurised breathers would suggest rings.
and an oil in bore test isnt really conclusive imho as a static test may pass but a dynamic one with the fun of compression can blow past. A leak down test would have been more conclusive.
^ is that where you fill it, and leave it overnight stu ?
+
you may be able to do a rough-check on the head with a real thin feeler gauge slid underneath a spirit level, and check it all over, although you need a pretty damn accurate steel level to do it properly.
is there oil in the water and water in the oil ?
spot any cracks in the head ?
a leak-down test is a pressuiresed compression test with an airline, where the pressure applied shows a drop off across a restriction depending on the 'flow' due to leakage in the cylinder.
ah, i see
Leak down test is the only way without throwing parts at it
Cheers guys hindsight I should of put the leak down tester on it first. Daft as it sounds if I put the head on but didn't time it up that would give the same reading as filling the chamber on the compression stroke am I correct?
Posting Permissions
Reply With Quote