Soulesonic Posted May 9, 2016 Share Posted May 9, 2016 Hello everyone, I have done some research on here for the past couple of weeks to get my 1986 comanche to stop over heating. I took it into the shop last month and they said that the water pump was likely going but they ended up just replacing my hoses and my radiator fan and assembly. Yesterday I took everything off and replaced my two belts and installed a new water pump! I felt pretty good about myself and everything sounded great when I put a bottle of fluid in and turned everything on. I ended up letting it run for about 5 mins and the oil and temperature gauge seemed fine. I then decided to take it for a spin and was only able to make it about 6 blocks (going about 30 mph) before it started to hiccup and then the temperature gauge started to climb very quickly. I pulled a u turn and headed home one to get back and see that my oil gauge was now reading all the way past anything to the right of the dial and the engine sort of did a "chug a chug clunk clunk clunk" when I turned it off in park. I checked my oil dip stick and it said that I had oil in there. I opened up the cap on the block and it had a bunch of smoke coming out? Does anyone have any idea what this could be? Is there any way to fix it? Any help would be very appreciated and Thank You ahead of time. Best Regards, Sam Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 9, 2016 Share Posted May 9, 2016 You probably had an air pocket in the engine . Are you certain you got the correct rotation water pump as well?You should also have changed the thermostat when you changed the water pump . Link to comment Share on other sites More sharing options...
Soulesonic Posted May 9, 2016 Author Share Posted May 9, 2016 The thermostat was changed last month and I tripple checked that I got the right rotation (noticed this was a big deal on a few threads) so I took a picture and double chekced it at the store. So if it is an air bubble, how would I get it to stop over heating? Just run it for awhile? Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 9, 2016 Share Posted May 9, 2016 You can park the truck on a hill or if you have a temp sensor that is at the top of the head you can remove it to let the air out . It doesn't need to be running . Link to comment Share on other sites More sharing options...
Soulesonic Posted May 9, 2016 Author Share Posted May 9, 2016 so just park it on a hill, put the thermostat in the car to heat, open the radiator cap and run it? Link to comment Share on other sites More sharing options...
Soulesonic Posted May 9, 2016 Author Share Posted May 9, 2016 I am not sure where the temp sensor on the top of the head is located. Sorry I am pretty new at doing any of this. Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 9, 2016 Share Posted May 9, 2016 Do you have the 2.5 or 2.8 ? Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted May 9, 2016 Share Posted May 9, 2016 Noticed in another thread you have the 2.5 . The sensor is on the top of the drivers side head near the firewall . Link to comment Share on other sites More sharing options...
Soulesonic Posted May 9, 2016 Author Share Posted May 9, 2016 it is the AMC 2.5 straight 4 I believe. It has two v belts and doesn't have the serpentine. Link to comment Share on other sites More sharing options...
Soulesonic Posted May 10, 2016 Author Share Posted May 10, 2016 Thanks I will check it out when I get home. So i just un screw it when it is parked on a hill and that will get the air out? Link to comment Share on other sites More sharing options...
Soulesonic Posted May 16, 2016 Author Share Posted May 16, 2016 Just wanted to say thanks! I did all of the above and got everything working. Took the truck on a 3 hour 65 mph plus drive on Friday and Sunday for a trip. Drove fine and didn't overheat at all. Planning on getting a tune up next week jsut to make sure I put everything where it needs to go but it looks good. Thanks again! :thumbsup: :bowdown: :thumbsup: Link to comment Share on other sites More sharing options...
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