Bad coolant leak: Pooling on top of engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68 TT · 10-01-2016, 01:14 PM

I had one of the TBI intakes actually corrode all the way through from the inside of the coolant crossover passage block off part of the intake and leak coolant out near the distributor from a tiny pinhole. Maybe you have a corrosion induced pinhole up near the thermostat housing.

Pinholes are hard to find unless you remove the intake and scrub it clean. I couldn't see it from the outside but could see daylight from the inside after I cleaned it up. I ended up getting another intake that was in much better condition instead of trying to fix the one I had.

10-01-2016, 01:14 PM	#7
68 TT Still plays with trucks Join Date: Jul 2009 Location: Spokane, WA Posts: 3,556	Re: Bad coolant leak: Pooling on top of engine I had one of the TBI intakes actually corrode all the way through from the inside of the coolant crossover passage block off part of the intake and leak coolant out near the distributor from a tiny pinhole. Maybe you have a corrosion induced pinhole up near the thermostat housing. Pinholes are hard to find unless you remove the intake and scrub it clean. I couldn't see it from the outside but could see daylight from the inside after I cleaned it up. I ended up getting another intake that was in much better condition instead of trying to fix the one I had. __________________ miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars



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