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Chevy S10 - GMC S15 and Sonoma Radiator and Cooling Issues

34 messages,  Last post on Nov 08, 2009 at 9:55 AM

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What is this discussion about? Chevrolet S-10, GMC Sonoma, Heating / Cooling, Truck

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#25 of 34 Cooling system on 4.3 GMC Sonoma by bcrawf53 Mar 08, 2009 (6:40 pm)
I change the thermostate and it is working fine so far. I'll have to wait for cooler weather for a real test. It seems to work better when the outside temp is higher than +40 degrees. Fuel mileage is up to thank goodness.
#26 of 34 Re: 99 GMC Sonoma [peter931] by bcrawf53 Mar 08, 2009 (6:43 pm)
Replying to: peter931 (Mar 08, 2009 2:50 pm) 4.3L 's have an issue with intake manifold's leaking. I had the same problem on my 94 GMC Safari. Changing the gasket took care of the problem!
#27 of 34 94 Mitsubishi Diamante Station vagon by peter931 Mar 31, 2009 (12:56 pm)
It is a 3.0L SOHC engine. No engine interference. After R&R timnig belt , engine is not running on 6 cylinders. All the marks on cams and cranc are in position , distributor rotor is on #1 . Piston #1 is in the TDC . I am in dead end. Any one know where could be the problem?
#28 of 34 Overheating ll... by firstof3cooks Apr 01, 2009 (4:45 pm)
I have a '95 GMC Sonoma 2.2L that's getting hot. The temp gauge only goes to about 210. But smoke is coming into the car through the heater. I thought it was the thermostat because I smell that radiator smell, but obviously that's not it. Any suggestions? Replies to this message: gonogo (Apr 02, 2009 7:57 am)
#29 of 34 Re: Overheating ll... [firstof3cooks] by gonogo Apr 02, 2009 (7:57 am)
Replying to: firstof3cooks (Apr 01, 2009 4:45 pm) Your heater core is leaking, not an easy job.
#30 of 34 Leaking Coolant... by the_big_al Oct 03, 2009 (2:34 pm)
Truck: 2001 Ex-cab 2wd s-10   Drivetrain: 4.3 V6 with Auto trans   I seem to have a coolant leak somewheres. It comes from the back of the motor. When the coolant level gets low enough the leak seems to stop, as well as the heater. When I fill the coolant back up, I can park the truck and after a few minutes (a run into the gas station to pay is long enough), I come back and it is dripping from the back of the motor at a pretty good rate.   When I run the heater, I dont get any odd smells into the cabin, but the heater will quit working once the coolant level gets low enough. I also do not have oil int he coolant or coolant in the oil. No smoking out the back of the tail pipe. The truck runs just fine. The only time it goes wonky is when the coolant level gets low. When the coolant is full, the temp gauge runs just below halfway (210 I think) and stays there. It also gets there quite quickly and always has. I know there is a couple of different places the leak could be, but I was wondering if there is a most likely culprit. Replies to this message: gonogo (Oct 04, 2009 5:53 am) the_big_al (Oct 06, 2009 2:51 pm) gonogo (Oct 07, 2009 6:13 am)
#31 of 34 Re: Leaking Coolant... [the_big_al] by gonogo Oct 04, 2009 (5:53 am)
Replying to: the_big_al (Oct 03, 2009 2:34 pm) Low coolant will effect heater operation. Seeing you have a V6, I would suspect the infamous intake manifold coolant leak, most times they will leak external. That's good news for you, get it repaired ASAP. Replies to this message: the_big_al (Oct 06, 2009 2:51 pm) gonogo (Oct 07, 2009 6:13 am)
#32 of 34 Re: Leaking Coolant... [gonogo] by the_big_al Oct 06, 2009 (2:51 pm)
Replying to: gonogo (Oct 04, 2009 5:53 am) although I am not looking for a step by step process (I'm pretty good at reading a chilton ), but what is the basic process to do this?? Replies to this message: gonogo (Oct 07, 2009 6:13 am)
#33 of 34 Re: Leaking Coolant... [the_big_al] by gonogo Oct 07, 2009 (6:13 am)
Replying to: the_big_al (Oct 06, 2009 2:51 pm) Get a book, easiest way to have complete information. First you need to look closer, prove it is the intake gasket, don't want to tear it all apart for nothing.
#34 of 34 S-10 cooling....1st time poster by jetjunky Nov 08, 2009 (9:55 am)
I have a 2002 S-10, 4.3, A/T. I just change the thermostat to a 195 deg. The operating temp now stays at 210 deg.( mid range on the gage ). My question is will this be detrimental to the life of the engine, will I see any difference in mpg, any adverse effects in warmer outside temps? I live in Phx. Ariz. so the temps can get quite hot in the summer months. What is the recommended operating water temp? Thanks for any help.

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