I changed my t-stat today, and flushed the cooling system. now my temp is boucning around alot from 188 to 210. Does the new t-stat need time to loosen up?

This is all under normal condtions, no hills, no towing. Just city and highway.

What ya think?

 

Need another t-stat. Be sure that you get one from Cummins or don't pay less than $30 for one from a parts store.

 

Stick with a cummins, mine did the same thing with a t-stat brand name.

 

AH &%#$ is all i wanna say at this time. Thanks guys

---AutoMerged DoublePost---

anyone got the part number, or what is the engine I would tell them its for?

 

There is a name plate on the gear housing,drivers side when you go to cummins they will want a number off that plate( i removed mine) give them that and your set.DONT go to the dodge dealer they want 80.00 or so for one.

 

Yeah roger that, I got a place by me called harbor diesel. They got parts for cats, detriots and cummins. I hope this motor is used enough in commerially that they will have it. but still &^#$

 

You might also check the radiator cap

 

Kinda glad this topic came up... My 99 just started this yesterday... TOTALLY out of the blue.... I haven't checked the coolant level, but figured the problem was either that or the WP... good call on the cap. I'll check that too.

Fingers crossed it's not a cracked block... she's a Fiddy3.

 

No there is nothing wrong you got a air bubble trapped in the system you'll have to burp the cooling system and reload it more. This occurs everytime I flush my cooling system it will burp a air bubble into the radiator and take in another 1 gallon of coolant.

 

So been about a week and the dang thing still bouncing aroung alot. Never goes over 220. The coolent level has not changed a bit. Anyway to bleed the cooling system?