75s30 Posted August 5, 2008 Share Posted August 5, 2008 I searched for about a good hour and couldn't find anything on this. It is probably out there though. I am leaking coolant behind #6 on the passenger side of the car right above the tranny. It is leaking in-between the head and the block right where the gasket is... I also checked the hoses for the cooling system but no leaks. This depleted my over flow completely and has gone into my radiator too. I ran the car for about 15 minutes today and started to leak coolant all over the driveway. I am not sure if has gone into my cylinders yet but it starts to leak as soon as the system builds pressure. But the car idles and drives perfectly fine. I was just wondering if anyone else has had this problem or something like it. Thanks guys. Quote Link to comment Share on other sites More sharing options...
dapiper Posted August 6, 2008 Share Posted August 6, 2008 Recheck the short hose between the head and heater core. I had one develop porosity from rot that only leaked under high RPM. Visible inspection revealed tiny holes when streched, simulating expansion at high pressure. I once had this hose burst during rev through gears. Also suspected head gasket failure and later determined this hose failed. Quote Link to comment Share on other sites More sharing options...
75s30 Posted August 6, 2008 Author Share Posted August 6, 2008 Recheck the short hose between the head and heater core. I had one develop porosity from rot that only leaked under high RPM. Visible inspection revealed tiny holes when streched, simulating expansion at high pressure. I once had this hose burst during rev through gears. Also suspected head gasket failure and later determined this hose failed. Dapiper, I checked that hose specifically but it's leaking onto the tranny but I can actually see the. Coolant leak out from the cylinder head and block. I was thinking it might have been the head gasket.... Like you said too but my cooling system is pressurizing. I thank you for your help I just. Need some answers before I rip my head off. Thanks again man. Quote Link to comment Share on other sites More sharing options...
blue72 Posted August 7, 2008 Share Posted August 7, 2008 Have you done a compression test on they cylinders yet? Leak down perhaps? It might not be HG related, but it'd be nice eliminate the possibility. Quote Link to comment Share on other sites More sharing options...
75s30 Posted August 7, 2008 Author Share Posted August 7, 2008 Have you done a compression test on they cylinders yet? Leak down perhaps? It might not be HG related, but it'd be nice eliminate the possibility. Blue72, I haven't done a compresion test on the cylinders yet. I plan on doing it sooner or later. But, there is a possiblity that it might not be HG related but it is a very big chance that it is. My girlfriends dad is a auto technician and help me run some diagnostics over the phone. But if the block is cracked or if the head is I might just give up on my ol' L28.... And start my next project. Thanks for the input though. No one has had this problem though? Quote Link to comment Share on other sites More sharing options...
Xnke Posted August 8, 2008 Share Posted August 8, 2008 It is likely the head gasket, leaking from the water port behind #6. Just change the gasket, and you will probably be ok. Quote Link to comment Share on other sites More sharing options...
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