Quote:
Originally Posted by steve25
Does your pump have the superior factory cast iron impeller and have you checked and if need be set the baffle plate to impeller clearance?
There are also a sealing rubber grommets in steel tubes that goes between the baffle plate and the timing cover on each side and there has to be a good seal made there when the baffle is pushed up against it.
If not shims can be had to raise them up off of the timing cover to get the needed compression and seal to be made.
Also your fan blades no matter how many should be spaced such that they sit half way in and half way out of the shroud .
210 to 215 degrees is not too hot when sitting at a hot idle with the AC on as long as the temps start to drop once above idle rpm and at 30 mph.
Are you boiling coolant out into your catch can at these times?
Have you got all the air out of your cooling system by burping it once the T stat opens and coolant flows?
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Yes. All the above has been done to include fan half in-out of the factory shroud. Found the smaller water pump pulley and will have that on hopefully later this week. I have a 19 inch flex-a-lite fan waiting in the wings to try if the new pulley setup doesn’t satisfy me. This is a non-AC car so the extra heat isn’t generated by that anyway… 210-215 may not be overheating but I don’t like it. So far it hasn’t belched coolant into the recovery tank. I never give it a chance. What is it about Pontiacs that makes them run hotter than other makes?? My big and small block Chevelles & Nova, mid sixties Mustang,, and late sixties Ford pickup would idle at 180-190 and never get any hotter no matter ambient temperatures. This Firebird just likes to FIGHT!