so today i replaced the coolant temp sending unit for the guage and ever since i did that my jeeps been slighly over heating, and i cant seem to get air out of the top cooling hose, i have taken off the cap and added water and squeezed it till bubbles stoped coming out and drove it around town for around 30-45 min and i cant seem to get it all out, i havent ever had this problem before last time i had it idle for a few min and it fixed itself real quick but for some reason this time its just being difficult, i dont see any leakes and the tstat/pump all are pretty new. i have to leave for work in a few and wont get home till late and tomm is the last day before a trip i have to work on it so i gotta get it fixed quick or once again its gonna be sitting at home while i take my dads ford lol any help appreciated

 

bump

when just revving it to around 2500 or so it stays the same temp as idle which is a few deg over 210, and the top hose stays full of air for the most part but does get hot, only when u put a load on it does it overheat, never quite to the red tho. leaving me and my dad scratching our heads atm :\

 

1983 Mercedes 300D (BrownBomber)

Not to thread jack but I noticed in your sig line the Merz. lol I have a beat to crap 82 300SD parked in my driveway. Looks like crap but started and ran every single day I needed it to.

as for the cooling issue. I know this might be a silly thing to ask but did you raise the front end some? Sometimes that helps the air flow to the higher point and out.

 

hehe yea there great cars only time it ever let me down was when the tranny went out, but i was still able to drive it the 2 blocks home in revers lol, but on topic, i did park it on a hill and same thing, my dad says to just keep driving it around and stuff tomm, im hoping it works out cuz thurs im supposed to go on a trip for a week and i think im gonna blow the thing up if it lets me down on yet another trip lol

 

huh..... strange. Try bleeding it at the back of the block where the temp sender is?

Mine is the closed pressure renix system so it's not exactly the same or anything but that was a suggestion given to me if bleeding at the pressure bottle didnt work.

 

i just hate to pull that annoying thing out again haha it was such a pain to get in and out :P

 

...lol yeah I have the idiot light and bought a temp gauge so Ill have to deal with that myself soon enough.


Not sure what else to suggest. Hopefully someone else will have an idea.


Maybe get it up to temp stab the out of the upper hose then replace it just to make you feel better?

 

lol i would but i replaced that hose like half a year ago when i replaced the radiator to :P someday i dream of just 1 off-road trip where my jeep doesn't do at least 1 thing wrong lol