Chasemmc
07-08-2017, 11:45 AM
Having been focused on the cooling system for the past few weeks, I have been reading about how to flush the core. The pix on 71's are interesting but the heat exchange does not match the 8v92ti's on my 56. I researched the past threads, but am not feeling comfortable tearing it apart at this point. (My prior mechanical experience is limited to changing the spark plug on my mower).
Upon removing the fill pressure cap on the port side, instead of antifreeze it had a black layer. I of course, being the mechanic I am, poked it with my finger. It was a thin brittle layer, similar to the top of a creme brulee (in a good restaurant - very thin). Rubbing between my fingers it turned into a black fine coating sort of greasy. Underneath was the green antifreeze.
Oil looks good, no frothing or light brown discoloration. Engine temps are 180 at 1500rpm +/- 3.
So I searched prior posts 2009 and I got the impression that the green stuff is not the recommended DD but should instead be Power Cool. Also in that thread they stated the crust could be the mixing of incompatible brands of coolant.
So probably a complete drain, flush and replacement is in order as well as sending off an oil sample to look for antifreeze. Mike P states their are testing strips that might help in an initial diagnosis.
What do you all think. Am I tilting at windmills, or should i not run that engine until some remediation takes place.
As always, thanks in advance for your expertise.
Mark
Upon removing the fill pressure cap on the port side, instead of antifreeze it had a black layer. I of course, being the mechanic I am, poked it with my finger. It was a thin brittle layer, similar to the top of a creme brulee (in a good restaurant - very thin). Rubbing between my fingers it turned into a black fine coating sort of greasy. Underneath was the green antifreeze.
Oil looks good, no frothing or light brown discoloration. Engine temps are 180 at 1500rpm +/- 3.
So I searched prior posts 2009 and I got the impression that the green stuff is not the recommended DD but should instead be Power Cool. Also in that thread they stated the crust could be the mixing of incompatible brands of coolant.
So probably a complete drain, flush and replacement is in order as well as sending off an oil sample to look for antifreeze. Mike P states their are testing strips that might help in an initial diagnosis.
What do you all think. Am I tilting at windmills, or should i not run that engine until some remediation takes place.
As always, thanks in advance for your expertise.
Mark