89 5.0 Mustang

I was wondering were ur temp guage is reading at operating temp. Is it good to be running in between the R and M?

Thanks Steve

OnyxCobra

Mine usually stays around the O, yours is about half way? How does the car run at that point? are the fans on or anything?

89 5.0 Mustang

well i bought one today and when test drivin it it was in between those two and the guy said it has always ran there, i just dont want to over heat in the summer

OnyxCobra

well i wouldn't think for a second that every mustang is going to be the same, i don't think ford's quality control is that solid. Keep in mind it's an older vehicle and may still be running original coolant, a flush could do wonders. I'd take it for a long drive and then let it sit and idle for a while and see what it does, pop the hood and see if it seems like it's running too hot. After my head swap my car would get really hot while sitting in traffic and it got hella sluggish, see if that's the same for that car.

Also it may just need a new Tstat.

89 5.0 Mustang

huh yea thats wat i wanted to do is checck the quality of the coolant then if needed a thermostat but its a arizona car and its hot there so if he never over heated i shouldnt but yea ill check those things out.
If stock came with a 180 t stat would it be bad to go to a lower degree

OnyxCobra

Stock tstat is a 192, don't go any lower than a 180.

89 5.0 Mustang

k yea ill have to check that out thanks man

golden_eye

Mine usually runs around the O or the R when I'm taking it easy. When I get on it a few times it creeps up around the halfway point and if I'm at the track or autocrossing it usually gets past that around the M or even the A. I know it's been awhile since the radiator has been flushed and I have a 180* thermostat that I haven't put in yet. This is all inFloridaBTW.

drhoward

Mine is usually around the n or o


Used to run very hot though, a new thermostat (and fixing that blow head gasket) did the trick


After I swapped in my cobra intake though, it ran alot hotter than it did stock with the original thermostat in it

drhoward

Oh if you want it to run a little cooler, try replacing your rad cap it does wonders for alot of guys