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Chevy S10 - GMC S15 and Sonoma Radiator and Cooling Issues

36 messages,  Last post on Nov 14, 2009 at 6:06 PM

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

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#5 of 36 Re: 95 S10 2.2l Overheating [gonogo] by sn4ck0 Jun 02, 2008 (8:35 am)
Replying to: gonogo (Jun 02, 2008 8:01 am) Strange I know,     I did so, had to take off the Thermostat housing, and saw that it was hot, steam, extremely hot to touch.     The problem is, with the thing plugged in, seems like the Thermo is not opening, so I removed the thermostat, and replaced it all together, and it seemed to have worked.    and if that is indeed the case, (Bad thermo) that would make two in a row.    One thing I saw, after taking the housing off, was one time there wasn't enough h20 to fill up to the sensor. (I think that is what you refered to as Airlocked, so I made adjustments and tried to fix that (Jacked up one side, and started with the heater on)      has to be one of two three things    Thermostat (again) Waterpump (doesn't seem likely, as it was pumping with out the thermo in) Sensor, that's the only thing I haven't replaced (after the initial replacement)     Any Ideas on what to do/check? Replies to this message: gonogo (Jun 03, 2008 7:53 am) jae5 (Jun 11, 2008 7:57 am)
#6 of 36 S10 Cooling Problems by rrt1441 Jun 03, 2008 (5:20 am)
My 95 S10 engine light comes on and temperature on gauge is higher than normal. Light comes on after driving a few miles and engine is hot. Have not noticed if the fan comes on. Could this be a sensor, or thermostat? RRT
#7 of 36 Re: 95 S10 2.2l Overheating [sn4ck0] by gonogo Jun 03, 2008 (7:53 am)
Replying to: sn4ck0 (Jun 02, 2008 8:35 am) I still think it is a gauge problem, not the right sensor, try a Delco sensor. Or gauge wiring problem, or bad gauge.
#8 of 36 Re: 95 S10 2.2l Overheating [sn4ck0] by jae5 Jun 11, 2008 (7:57 am)
Replying to: sn4ck0 (Jun 02, 2008 8:35 am) When you replaced the original thermostat did you install the new one in the same position as the old. On the 4.3s you have to have the thermostat clocked in the right position or you can have issues. You can also check thermostat operation really easy by placing the thermostat in a pot and bring the water to a boil and see when it opens (should be 195 as stated).   Are you using dex-cool (orange) coolant or the regular green? If using Dex-Cool you have to use a flushing agent / kit to get all of the old crap out; if not you can run into the problems you're having as well.   You still may be having an air problem. You definitely have to have the heater on, blower on high, when your topping off or you can get air trapped in the system. You can do the initial system fill with everything shut off but after that you need to have the engine running and the the heater on to get the air out to finish topping it off. And what do you mean you jacked up one side? Did you jack up the truck so that water / coolant would fill up to the sensor? And you are using water / coolant right, not straight water.   As stated the sensor may be out of spec, not sending out the right signal or is the wrong one. But it wouldn't cause an "real" overheating issue as it shouldn't be blocking a main coolant passage.
#9 of 36 Use of Dex-Cool by cachevy Jul 30, 2008 (4:35 pm)
I just purchased a 2000 S-10, with a 4.3 V-6, I am being told by my mechanic that this product eats up the inside of engine & I already have a intake leak. Also that it is better to flush coolant out & replace with green anti-freeze. Any suggestions out there? I did not expect this appox. $700 repair B-4 I've driven truck more than 200 miles. Any thing else to look for? Thanks Replies to this message: littleosco (Jul 30, 2008 7:23 pm) berto01 (Jan 11, 2009 8:24 am) gonogo (Jan 12, 2009 8:45 am)
#10 of 36 Re: Use of Dex-Cool [cachevy] by littleosco Jul 30, 2008 (7:23 pm)
Replying to: cachevy (Jul 30, 2008 4:35 pm) We have the same vehicle, same engine. We were told that the Dex Cool needs to be replaced fairly often or it gets thick and gums up your engine. Come to think of it, we've only changed it a couple times and it's probably due again. I've not heard of replacing it with regular anti freeze but just being aware that the Dex Cool can cause these problems.
#11 of 36 01 Sonoma - colling fan not working by lovethytruck Sep 19, 2008 (5:42 pm)
My cooling fan isn't kicking on. The temp. guage seems to be working fine since it reads normal while the vehicle is moving. I tried free-spinning the fan blades with the engine off and there is plenty of resistance. I checked all the fuses, both under the hood and in the dashboard, and they are all okay. Not quite sure where to go from here. No other symptoms other than overheating at idle or after the engine has been shutoff. Any suggestions would be appreciated.
#12 of 36 engine overheating by cmac8874 Sep 28, 2008 (10:34 am)
My 1995 S-10 is leaking from the backside of the engine. I can't see any visual signs on the top, but underneath a steady stream is coming down between the starter and oil pan. I was wondering if there are freeze plugs back there that I can't see. The oil is clear of water, so I'm hoping it's not a cracked head. Just wondering if anyone else has had this problem. Replies to this message: jpf (Sep 28, 2008 11:22 am) cmac8874 (Sep 28, 2008 5:42 pm) jpf (Sep 29, 2008 11:15 am)
#13 of 36 Re: engine overheating [cmac8874] by jpf Sep 28, 2008 (11:22 am)
Replying to: cmac8874 (Sep 28, 2008 10:34 am) What size engine is it? Replies to this message: cmac8874 (Sep 28, 2008 5:42 pm) jpf (Sep 29, 2008 11:15 am)
#14 of 36 Re: engine overheating [jpf] by cmac8874 Sep 28, 2008 (5:42 pm)
Replying to: jpf (Sep 28, 2008 11:22 am) 4.3 vortec Replies to this message: jpf (Sep 29, 2008 11:15 am)

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