Re: 91 overheating
Not sure about right after the exhaust work. When it was done, the
temperature gauge stopped working. That was replaced and all seemed well at
We don't use the truck very much the past couple of years - about 4,000
miles a year.
The temperature problem became evident when we pulled out pop-up camper on a
trip that ended up abruptly in West Virginia when the pump blew out on the
transmission. Stupid me had the transmission rebuilt instead of junking the
truck. Since then any time you go over 2,200 or so RPM - the temperature
climbs about 30 seconds after you hit the gas.
The radiator hoses are also new and don't appear like they could collapse.
I havent found any that have the coil spring inside like some others.
Any other ideas?
"Ulysses" <firstname.lastname@example.org> wrote in message
> "Ulysses" <email@example.com> wrote in message
>> "Randy Johnson" <firstname.lastname@example.org> wrote in message
>> > Hello there -
>> > My '91 4 door automatic has been annoying me for a couple of years now.
>> > Three years ago, the transmission was replaced, exhaust also. Since
>> > have had an overheating problem while accelerating. Any thing over
>> > 2500
>> > will make the temperature jump.
>> > I have replaced the guage sender, the radiator, hoses, water pump and
>> > clutch over the past few years as these were more or less worn out.
>> > To make things livable, i have drilled a couple of extra holes in the
>> > thermostat. It takes a while to warm up, but the temp sits at the "o"
>> > normal. Hit the gas and watch it jump for a minute or two and go back
>> > where it started. Yes, the engine really does get hot. Without the
>> > i was overheating when it was 15 below zero. Tried replacing the
>> > oxygen
>> > sensor - no change.
>> > It doesn't matter if driving or reving in neutral - same thing - temp
>> > when accelerating.
>> > Sounds like it is running lean?
>> > 190,000 miles.
>> > Could it be an issue with our newer blends of gas?
>> > Help,
>> > Randy
>> Did it begin when when the exhaust was replaced? I have not had this
>> particular problem yet but while researching MY overheating problems I
>> that a blocked catalytic converter could cause overheating.
>> I'm about to replace my radiator and fan clutch in a few minutes. I'm
>> pretty sure my fan clutch is bad (it turns freely when the engine is hot
>> I never get that "whoosh" sound any more) and my radiator is clogged. If
>> that doesn't work I'll be doing all the other things that you did (not
>> about drilling holes in my thermostat though) so please post any progress
>> you make and solutions you may find. I thought I'd solved the problem on
>> '92 but the temp gauge went up while I was going up a steep hill. The
>> of the time the temp gauge barely moves. I put in a new thermostat not
>> long ago. I guess I'll have to yank it out and test it. At least it's
>> dumping coolant any more when I shut off the engine. My '91 is close to
>> being undrivable right now unless the outside temp is 90 F or less.
> Well, my fan clutch was all oil and goopy on the thermostat and there was
> much mud on the radiator that it was probably only working about 15-20%.
> Considering that I now have 3 Exploders I decided to just go ahead and put
> in the new radiator and keep the old one for a spare.
> I went up some steep dirt hills in 4WD with the AC on and now the temp
> up about halfway (100 F here today) and then drops back down to about one
> forth of the way up. It will now idle at a stop with the AC on without
> overheating. That's a big improvement but I have not given it the windy
> mountain road test yet.