CaptainPatchy

What's the best way to burp this system, if there is one? I kept topping off the rad while it warmed up and squeezing the upper rad hose to help it along.

Thanks for the tips, the coolant system looks to be pretty much all new parts. New-ish looking water pump, Aluminum "Mishimoto" (the seller claimed) radiator, with a triple 10" electric derale fan setup with a pwm controller. It's all pretty foreign to me, but when I checked the overflow it was empty, and the rad took almost a gallon of distilled water to fill up. I put another 1/2 gallon in the overflow and it hasn't left spots yet, but I'll keep an close eye on it for now. I'm gonna peel the thermostat housing open this weekend and see what's going on, and go from there. Thanks

Thanks, I'm going to check the thermostat this weekend while I'm going through it in more detail. I'll have someone mess with the wire and see what's up. Thanks

My recently purchased MJ has had several small issues that I'm slowly working my way through, however one has me sort of confused. The truck has a full cluster, either swapped in or factory I'm not sure, but it all seems to work correctly, except for sometimes the temperature gauge. Works normal after start up, however seems to be running very cold for a long time, and once it finally get's up to a normal temp (~190-210F) if I hit bumps, speed up or slow down too quickly the temp gauge will sometimes bounce around +-100 degrees! It will usually come back, but never seems to have any problems sitting there idling. Could this be mechanical in some way, or likely a bad ground somewhere? The sender for these is on the back of the head, driver side correct? I've got a thermostat housing with some sort of sender plumbed into it as well, so I don't know what's going on with it

91' Jeep Comanche Eliminator 4.0, AW4, no transfer case, Solid beam front, Dana 35 rear, Short wheel base Build date: not sure yet, haven't had a chance to look Current Location: Midwest, Nebraska, Omaha Status: On the road becoming my summer DD Notes: 2wd shortbed eliminator model, kind of a faded dark gray/black paint with gray and white decals. Gray cloth interior with buckets and full XJ style console, with floor shifter. Current owner: Myself, just aquired last weekend.