hi y'all
87 blazer 350, at
as some of ya know (Doc), i had my intake manifold gasket replaced for a leak, and egr valve replaced due to poor performance-it was working, but telling the 'puter that it was at WOT when it was really at part throttle...anyway, i notice that when i first start driving in the morning, or anytime its been sitting for awhile, like after work, the temp guage goes over about 3/4 the way - almost to the red. It will then sit there for a minute then head on back down to its normal comfortable range.
Some parts jockey at Autozone said that exhaust gases is gettin' in to the waterjacket and i would have to have the gaskets all redone again. So i took it to the shop and tried to replicate it for them, but it was still fairly warm and would not get as far deep into the temp range as before (only got past the 210 mark a little bit as i kept givin' it gas). they checked the temps w/ some little laser gun temperature checker at various spots and got temps from 180 -190. Said my guage was probably off
10 degrees, and probably was not leaking exhaust into water jacket I am just all freaked out now thinkin' the worst, because temp guage never acted like this before and was wondering if there is any sure fire way to check for 'exhaust gases' getting in the water jacket? I changed the thermostat to see if that made a difference, and it did not. no coolant disappearing, no white smoke that i can discern. any advice is much obliged. thanks! jim