Over heating ( still not fixed)

89zdrifter · Posted: Thu Jul 03, 2008 6:04 pm Post subject: Over heating ( still not fixed)

Ok ive had this for a long while now. Just not getting to fix it. At stop lights my car watns to over heat but when driving it stays at normal temp. I opend up the thermostat to check it but their is not one so its constantly open so whats going on?

imthegr8_1 · Posted: Thu Jul 03, 2008 6:07 pm Post subject:

is it actually overheating..or just getting warmer?...if its actually overheating, i'd say your fan is phucked

if its only getting warmer, its normal

cam39 · Posted: Thu Jul 03, 2008 6:23 pm Post subject:

X2 on the fan, but if your thermostat is constantly open your car should take like forever to heat up

89zdrifter · Posted: Thu Jul 03, 2008 6:29 pm Post subject: hmm

Well last I checked which was when I first got it the fan was working fine. car heats up normal and when im driving runs normal. when stoped it starts getting over 200 and you can smell oil spills on the engine start burning off.

88cavalierz24 · Posted: Thu Jul 03, 2008 6:38 pm Post subject:

lets see at idle engine is under 1k rpms so the coolant isnt flowing as much as if you were driving the car, also as you are driving air is cooling the radiator which is cooling the coolant. Why not just run a themostat? also fan come on when it should? temp gauge accurate?

89zdrifter · Posted: Thu Jul 03, 2008 7:22 pm Post subject: ok

Im sure the gauge is right cause when it reads over 200 I start to smell burning oil off the block and stuff and not only that but you can feel the heat in the floor pan.

2 there was no thermostat in I just looked so I put one in no difference. It boils coolant out the box with the lid just spits it out. So I checked for bad head gasket and the oil never boiled nor is it thin it just took about 15 seconds under a lighter and cought fire to the dipstick so oil is clean.

Im not losing coolant during use either light does not come on so I didnt think so anyways.

Fan does come on it was running while the temp was climing.

Im thinking its got a block in it somewhere or needs flushed realy good.

What does it sound like?

Also I have a idle climb takes it a minute but then it starts slowly going up. I knocked on the MAP/MAF on the firewall no chance pinched the hose nothing differenent unpluged the EGR nothing unpluged the vacuum on the EGR slight change nothing made a huge difference. Change them both?

I mean the line looked pretty rusty inside when I opened up the thermostat.

The old wrecked Z i took the thermostat out of was spoltless inside just about still could see the bluish looking seal where the thermostat seats like it was new and just ver pin head size rust spots.

So anymore ideas?

spaceman · Posted: Thu Jul 03, 2008 7:28 pm Post subject:

Either a clog or the rad cap isnt sealing properly

pezed · Posted: Thu Jul 03, 2008 7:35 pm Post subject:

flush the coolant system out with a garden hose. radiator might be clogged up. its also a pain to bleed the jbody coolant systems at times, you might have an air bubble stuck in the system, but if that were the case i'd think you'd overheat while moving also.

89zdrifter · Posted: Thu Jul 03, 2008 7:36 pm Post subject: hmm

Well where do I stick the hose down? Ill try it though. If that dont work I dont get paid till monday (stupid 4th) ill buy a flush kit.

barrok69 · Posted: Thu Jul 03, 2008 8:33 pm Post subject:

Pressure test your coolant reservoir cap

89zdrifter · Posted: Thu Jul 03, 2008 8:53 pm Post subject: ok

Its holding pressure its brand new one of the clamp down kind. Ill test it at works till though.

But I didnt run a hose with a spray nozel and sprayed down the engine intake on the coolant system and had the cap off and well not much overflow came out of the top line where the feedback into the tank is.

Found out also having the pressure on the system that the metal hose on the font of the engine where it met the rubber line back into the tank was about rusted shut and broke so a drip leak was going on. So I changed the lines out and put pressure back on. Got alot more out of the lines. I also hooked up the hose with that line off to see how much sprayed out the metal cap over the thermostat and it was free flowing.

So I filled it up with water started her up and worked out the air bubbles put the cap on and it took pressure. It got warmed up hit 220 the fan kicked in and ran for a bit I got in the car and reved it a bit to see if it would heat up and it was cooling down then the fan went off less than 5 mintues after starting and I didnt know and the heat started right back up way past 220 and it didnt kick in so I shut it down.

Temp sending unit? Fan relay? Im guessing on these.

barrok69 · Posted: Thu Jul 03, 2008 9:50 pm Post subject: Re: ok

89zdrifter · Posted: Thu Jul 03, 2008 10:10 pm Post subject: ok

I havnt jumped it no but I dunno if old owners did or anything like that.

Anything else it could be before I tear into my glove box?

My old car had a digi dash this one has analog so it wont work our right for me to swap the ecms on them so what do I do?

thumbs · Posted: Fri Jul 04, 2008 5:04 am Post subject:

mine does the samr thing i know my water pump is weak

jerboa327 · Posted: Fri Jul 04, 2008 10:49 am Post subject:

bad catalytic converter?

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