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I changed the water pump on my friends 05 Chevy Equinox today. He says that the car is running half way on his thermostat gage and that is a little higher than the gage normally reads. Is that something that can result from changing a water pump? I have never heard of that before, so I thought it was appropriate to ask here.
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+1 Anytime you open the cooling system for service, you need to purge the air out after you finish the job. This removes the air from the system and makes sure that the rest of the cooling system is functioning properly such as the thermostat and fans. More info here.
http://www.ericthecarguy.com/faq/what-to-do-when-your-engine-overheats
Keep us posted if you have anymore issues.
a good note on tis job is to have one of those special skinny tourque arm bars to remove the belt and reinstall, lmao, I did it with a cargo strap put behind it and pulled the tension off enough to get the job done. I saw one the other day at a local hardware store and was pretty blown away, I wondered why it was engineered so close to the bottom of the wheel well, but that tool would have saved a lot of busted knuckles
I hope it’s not impolite to crash somebody’s post with a quick question. I have a spill free funnel. Also, I’ve watched this video. It has worked great on all my vehicles except one. On the GM 3400, when the engine heats up, coolant will rise significantly in the funnel. Usually I fill it slowly, until there is very little coolant present at the bottom of the funnel initially. When the engine gets hot, the coolant rises in the funnel significantly. I actually have to engage the plunger to keep it from overflowing. Then, when I shut the engine off, it will get sucked back into the radiator. I repeat this process a few times, until the cooling fans cycle and it’s generally fine. Do you guys know why this happens? Is it common with certain set ups? Again, it seems to be with this particular vehicle. No overheat symptoms exist afterwards. Thanks.
different vehicles have different procedures for bleeding out the cooling systems. depending on the year of your GM I think you may actually need some special equipment to bleed the system out properly. I’m not entirely sure if this is correct or not but I know on most modern vehicles like to bleed out the brakes properly you need a dealer level scan tool, sounds crazy but that’s how they’re making them now. anyways, you may wanna check with the manufacturer about what the proper procedure is for your vehicle and I’m sure they could tell you. I know Eric has written extensive articles on many different topics, I believe I saw one about bleeding out cooling systems, so you may wanna check that out also. good luck
Thanks, I’ll get off this guys post. This vehicle is equipped with two bleeder valves, one near the water pump and the other near the thermostat. Before investing in the spill free funnel I would do it this way; it just took forever…
[quote=”tomatofarmer1″ post=113486]I hope it’s not impolite to crash somebody’s post with a quick question. I have a spill free funnel. Also, I’ve watched this video. It has worked great on all my vehicles except one. On the GM 3400, when the engine heats up, coolant will rise significantly in the funnel. Usually I fill it slowly, until there is very little coolant present at the bottom of the funnel initially. When the engine gets hot, the coolant rises in the funnel significantly. I actually have to engage the plunger to keep it from overflowing. Then, when I shut the engine off, it will get sucked back into the radiator. I repeat this process a few times, until the cooling fans cycle and it’s generally fine. Do you guys know why this happens? Is it common with certain set ups? Again, it seems to be with this particular vehicle. No overheat symptoms exist afterwards. Thanks.[/quote]
In the future please start a new thread for a different issue. It helps keep our database happy. To answer your question, that is quite common. It happens when air is trapped in the system and doesn’t allow the thermostat to open. Shutting it off and letting it sit often cures the problem as the warm coolant can them come into contact with the thermostat and allow it to open. Once it’s open things begin to flow again you should be able to continue to purge the system. Lastly, some aftermarket radiators don’t flow as well and as a result make this process more difficult.
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