bubbling in coolant bottle? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Boog** · 01-21-2012, 09:24 PM

I looked at and drove a 2006 GMC today with the 5.3 with 114,000 miles. Just after startup while leaving the lot it started missing a bit and the cel was flashing. After about 2 blocks the engine warmed up, the cel went out and the miss was gone. The truck ran great after that. However when I raised the hood I noticed the coolant bottle was a little low and there was steady bubbling in it. There is no evidence of external leaks.
Question is what are the odds it's got a bad head gasket or cracked head causing the bubbling in the coolant tank? The engine temp remained normal.

01-21-2012, 09:24 PM	#1
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,095	bubbling in coolant bottle? I looked at and drove a 2006 GMC today with the 5.3 with 114,000 miles. Just after startup while leaving the lot it started missing a bit and the cel was flashing. After about 2 blocks the engine warmed up, the cel went out and the miss was gone. The truck ran great after that. However when I raised the hood I noticed the coolant bottle was a little low and there was steady bubbling in it. There is no evidence of external leaks. Question is what are the odds it's got a bad head gasket or cracked head causing the bubbling in the coolant tank? The engine temp remained normal. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross



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