On 2005-07-24 00:25, Luv70sFords wrote:
JAck up the front of the car as high as you can. This should let any trapped air get out.
IF the coolant wasnt flowing, it'd over heat at any speed. His is simply an airflow issue. Is there an A/C condensor or an oil cooler that wasnt there before? Is he running a shroud? Real easy one to overlook, but is the fan installed backwards? Are the fan blades pitched the right direction? I'd look at anything that could impede airflow before doing anything else. If that doesnt do it, Maybe he needs a smaller water pump pulley or larger crank pulley to get things moving faster at idle.
thanks for the replies guys-
will ask him if he tried this jacking up to get air out...
coolant must be flowing at cruise rpm- I did look at his fan, its running right direction(was wondering if 'marine' FE's with reverse rotation were ever built- heard long ago of a guy with a checy heating problem- had marine water pump with reverse impeller). fan was about 2" from radiator, thought it might benifit from longer spacer, but he said gap was same as original. * just rethinking, wondering if perhaps he got a pump that was rebuilt and impeller flipped? anyone out there know if this would even be possible?* Ive seen similar coolant pumps on machines running backwards but still pumping at very reduced flow...
I looked at his fan/shroud- he had a kinda homemade shroud which was more of just a 3 sided box that would help nothing...I mentioned without shroud being close to the fan it wouldnt help...he said he was getting a factory shroud this week, and if it didnt help was going to try an electric fan.
hopefully one or the other will help, but i still think hes got something else amiss in there...
Ive never rebuilt a water pump, so dunno if assembly error is possible, but ran into a rebuild error just a couple months ago on an alternator- case was spun 180, plugs woulda hit the block...Rebuilders hire new guys once in a while too
I'm curious on rebuilding FE pumps if impeller has to be pressed off the shaft to replace bearings/seals...he told me he put 2 new pumps on, but dunno if from same vendor or not- is there a way to look into the inlet/outlet to actually 'see' the impeller direction?
I was thinking a shroud would help, but if you would see how fast his temp gage shoots up at idle, I really think he's not getting any circulation at all at idle rpm- I cant imagine an idling motor heating the radiator contents in under 30 seconds- I mean after 10 seconds the temp starts to rise and fast. Sure hope he hasnt got clearance(assembly) issues, as he's never done any engine work before and is relying on others- first try somebody didnt like the ring gap so bought bigger rings, he had to have it tore down and swapped- guess it was so tight it wouldnt crank once it started to warm up.(heard of similar mess from a friend that cut/gapped oil 'expansion' springs to match oil scraper ring gap when rebuilding his brothers motor- probably sounds kinda funny to someone that knows better, man did that poor car smoke...I'd definitely call that learning the hard way)