tchenku midshipman 18586 Posts user info edit post |
'92 240sx 4cyl etc
The coolant system remains pressurized after letting the car sit and get cold. When removing the radiator cap, there is a noticeable push of pressure out of the radiator. I release the pressure every few days just in case it's not normal. System is properly bled.
Am I due for a HG or is this normal?
[Edited on February 5, 2008 at 3:41 PM. Reason : zero overheating, no continuous bubbles during bleeding] 2/5/2008 3:37:58 PM |
ScHpEnXeL Suspended 32613 Posts user info edit post |
head gasket 2/5/2008 3:57:34 PM |
nightkid86 All American 1149 Posts user info edit post |
comp test time 2/5/2008 5:16:10 PM |
tchenku midshipman 18586 Posts user info edit post |
132-138-125-137
[Edited on February 5, 2008 at 5:54 PM. Reason : cold engine] 2/5/2008 5:52:49 PM |
ScHpEnXeL Suspended 32613 Posts user info edit post |
meh, one thing i'd look at is if the coolant hoses pressurize very quickly after starting the engine (after you've relieved the pressure like you say you do regularly..) I had a 3000GT one time with a blown head gasket and as soon as you'd start it the hoses would blow up... worth looking at anyways before you tear into it
[Edited on February 5, 2008 at 6:34 PM. Reason : not literally "blow up" but they'd pressurize] 2/5/2008 6:34:35 PM |
zxappeal All American 26824 Posts user info edit post |
If you have a head gasket issue, why is the thing still holding pressure after it's cold? Could be that the head gasket will allow seepage one way, but pinches back when the flow attempts to reverse. Then, also there could be a pressure threshold at which the gasket will leak, but below which leakage does not occur.
Does the thing blow anything into the overflow tank under extended operation? Does the level go up at all?
Cylinder pressures aren't what I would call stellar by any means; did you check 'em hot? How about squirting oil in the cylinders? Make a difference?
What's the condition of the radiator cap? 2/5/2008 7:27:13 PM |
optmusprimer All American 30318 Posts user info edit post |
Seriously.
2/5/2008 7:39:42 PM |
Seotaji All American 34244 Posts user info edit post |
^ every time i don't follow that flowchart, i fuck myself over. 2/5/2008 9:48:37 PM |