Thermostat replacement help

[MikeE024]

Shop pressure tested cooling system at idle after replacing the radiator for the second time in a month(free) supposedly due to poor quality Murray rads which is my mistake for not getting a oem
No coolant in oil
Brand new Mopar rad cap
Ive had a couple shops here in Yuma look at it and neither “thinks” it’s a head gasket but neither shop has impressed me with their competence. For example I had a shop replace the radiator and flush out the blue coolant from engine and replace with G05 I supplied and now I have green coolant because they didn’t flush the engine good.
It seems to spray out the reservoir when rpm’s get higher like when accelerating onto highway.
I personally think it’s a small leak in head gasket

My G-05 looks like dehydrated piss (darkish yellow). Maybe the shop didn't drain the block. If you have leftover coolant you can compare the color to what's in your reservoir.

Have you done a compression test? That's the first thing I do on a vehicle if I don't have it tested before I purchase a vehicle. I'd also check the spark plugs for any indication of coolant (might not show yet but worth looking).

Edit: when mine leaked from the reservoir lid and the fan sprayed it all over, there was a distinct line of coolant splatter on the inside of the hood. Are you overheating?

 

[Amberfire01Tj]

My G-05 looks like dehydrated piss (darkish yellow). Maybe the shop didn't drain the block. If you have leftover coolant you can compare the color to what's in your reservoir.

Have you done a compression test? That's the first thing I do on a vehicle if I don't have it tested before I purchase a vehicle. I'd also check the spark plugs for any indication of coolant (might not show yet but worth looking).

View attachment 403808

Edit: when mine leaked due to the fan, it was blasted all over, and there was a distinct line of coolant splatter on the inside of the hood. Are you overheating?

The leftover G-05 I have is translucent yellow
Compression test will be next
No overheating or fluctuating temps
I actually ordered new spark plugs so I’ll check on condition of current plugs soon
When the rad was leaking coolant ended up all over the hood but since I replaced the radiator it seems to only spray out of reservoir flimsy cap onto the hood directly above the reservoir

 

[MikeE024]

The leftover G-05 I have is translucent yellow
Compression test will be next
No overheating or fluctuating temps
I actually ordered new spark plugs so I’ll check on condition of current plugs soon
When the rad was leaking coolant ended up all over the hood but since I replaced the radiator it seems to only spray out of reservoir flimsy cap onto the hood directly above the reservoir

Translucent yellow sounds fine. If what you have in the engine doesn't match then you know better than us if it's correct or not. The problem is that you don't know if the G-05 is compatible with what's in there. Personally, I would flush it once you get this issue figured out. But I have a demon in me that 99.9% of the time does not allow laziness to win the day bc I priorize things being done right over leisure.

Honestly, I would add the gasket to the inside of the reservoir lid/flimsy cap before doing the other stuff. My reservoir lid leaked bad by simply bouncing around on local roads. The 1/8 foam gasket I cut out solved the issue.

You aren't overheating which sounds like really good news. I had a blown head gasket on a built race quad. My temps went to 240+ and would pop the reservoir cap clean off the reservoir and I'd be low coolant in the radiator and the reservoir. If your radiator is holding coolant and you aren't overheating, IMO that points to gasketing the plastic cap on the reservoir then see what happens. Cheap and easy to do. Just measure the lid's inside diameter, then cut out adhesive backed 1/8" closed cell foam in the same size, then place the foam on the underside of the lid. Done.

I also leaked out the back rectangular port of the reservoir and I stopped that from making a mess by adding a rubber hose that feeds down towards the axle. I may have used 1" ID. I'm not with the Jeep rn so I can't verify.

 

[Amberfire01Tj]

I was just topping off and burping the system after replacing thermostat and the lower hose never seemed to get stiff or felt like it was full of coolant
temp gauge didn’t get higher than 210-215. Normally says 195

 

[MikeE024]

I was just topping off and burping the system after replacing thermostat and the lower hose never seemed to get stiff or felt like it was full of coolant
temp gauge didn’t get higher than 210-215. Normally says 195

Sounds encouraging.

If interested, see posts #18 and #19 for photos of the gasket material I used and hose (1" ID). Edit: The link shows I did the windshield wiper reservoir as well.

 

[Amberfire01Tj]

Sounds encouraging.

If interested, see posts #18 and #19 for photos of the gasket material I used and hose (1" ID). Edit: The link shows I did the windshield wiper reservoir as well.

Thanks for the tip…I lined my rad overflow and washer fluid tanks lid and after some off-roading I didn’t leak anything
I also used the foam on my d-ring bolts so I don’t hear the really loud annoying sound of metal clanking

seems like after replacing the thermostat that was upside down, I haven’t been leaking coolant or getting any spray