Reverend Posted September 26, 2011 Share #13 Posted September 26, 2011 I was afraid too when changing the head gasket for the very first time in my life, thx to this forum, i managed to do it well and car is in superb condition now. Didnt have your symptoms though. Mine was just leaking from the HG. Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367375 Share on other sites More sharing options...
madkaw Posted September 26, 2011 Author Share #14 Posted September 26, 2011 I will see if I can find that block check stuff locally!I'm not afraid to change the headgasket-I'm the one that put this engine together----maybe I should be afraid;) Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367404 Share on other sites More sharing options...
madkaw Posted September 26, 2011 Author Share #15 Posted September 26, 2011 I rented from autozone a pressure tester for the coolant system to help narrow down my problem. According to the instructions, once hooked up and the car running I watched for a rise in the pressure. As the engine warmed up the pressure rose quickly and the instructions stated to pull spark plug wires to see if it diffuses the rise in pressure. My suspect cylinder #3 was the first plug I pulled and the pressure immediately stopped rising-so I would say that the headgasket is the issue and it is in the vicinity of # 3 cylinder.Hr369, I asked for the block tester you recommended and they gave me the test fluid and this pressure tester. I should have looked at it closer, but the fluid wasn't meant to use with the pressure tester-but the pressure tester still was a good diagnostic tool. Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367455 Share on other sites More sharing options...
240ZGL Posted September 26, 2011 Share #16 Posted September 26, 2011 You might have to pull the head to check this but the water jackets run just below the exhaust ports. On my E88 head I had #6 water jacket that ate away at the exhaust port. I found a hole in the bottom of the port. You might try pulling the exhaust manifold and checking the floors of the ports. Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367462 Share on other sites More sharing options...
LeonV Posted September 27, 2011 Share #17 Posted September 27, 2011 Did you have the head checked for cracks before replacing it? Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367545 Share on other sites More sharing options...
madkaw Posted September 27, 2011 Author Share #18 Posted September 27, 2011 The head was totally reworked Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367562 Share on other sites More sharing options...
madkaw Posted September 29, 2011 Author Share #19 Posted September 29, 2011 Pulled off the head today and good news and bad news.Good news is no detonation damage-cylinder walls looked great as well as the combustion chambers.bad news is there is nothing that jumps out at me here as to why the gasket gave out. I can't see anything apparent for the coolant getting into the cylinder. Honestly I haven't been down this road before as far as diagnosing a bad gasket visually. The gasket didn't come off in one piece-some of the material was on both the head and block. The fire rings on the gasket looked okay. I guess I will post up some pics, but number 3 was definitely not burning correctly. Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367747 Share on other sites More sharing options...
LeonV Posted September 29, 2011 Share #20 Posted September 29, 2011 Did you have a look under the valve cover and check the valves at that cylinder? Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367753 Share on other sites More sharing options...
madkaw Posted September 29, 2011 Author Share #21 Posted September 29, 2011 Cylinder read 180 on compression test and the problem seems to be coolant, so what would I be looking for under the valve cover Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367754 Share on other sites More sharing options...
LeonV Posted September 29, 2011 Share #22 Posted September 29, 2011 I'd check lash and double check the rocker arm and surrounding parts to make sure everything there is okay. Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367758 Share on other sites More sharing options...
madkaw Posted September 29, 2011 Author Share #23 Posted September 29, 2011 here are some pics Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367759 Share on other sites More sharing options...
Diseazd Posted September 30, 2011 Share #24 Posted September 30, 2011 Steve....Did you check your eyebrows in the block to make sure they didn't undercut your gasket? The detail in these pics of the block aren't very good, but it seems to me I remember your previous pics looked like they were pretty deep and wide. Just a thought. Guy Link to comment https://www.classiczcars.com/topic/40879-dam-i-think-i-just-blew-a-head-gasket/?page=2#findComment-367772 Share on other sites More sharing options...
zKars
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