Temperature Guage Fluctuation/Cycling

[MikeTEC]

I have read other posts on cycling or fluctuating temperatue guages but no one seems to have a common fix. Here is my situation on my 1993 EB: Several weeks ago I had a new Modine two row radiator installed, along with a Ford HD fan, Ford HD fan clutch, Ford 195 degree thermostat, Ford temperature sending unit and new Ford radiator hoses. Since them, my temperature guage fluctuates or "dances" from N to L on the guage. Any suggestions as to a fix to the problem? Thanks Mike

 

[Bill Kemp]

I'm thinking...1. Air in the coolant. 2. Radiator cap. 3. Thermostat .
Park up hill and run the engine up to temp with the cap off to get air out. Pressure test the cap. Check out that the t-stat is installed correctly and if so replace it. New one could be bad.
Good luck....

 

[Ross-N-Chicago]

ive heard of some guys getting stant 16lb pressure rad caps. they've said it solves the problem. and burp your system. i had trapped air--sounding like a four year old playing drums under the hood--and cycled more than usual. my .02

 

[MikeTEC]

Thanks Bill and Rossneag: Forgot to mention when I had all he work done I also installed a new Stant 13 lb. cap. I will try the parking up hill method to see if that helps. I also may try a 16 lb. cap. Thanks for both of your responses. Mike

 

[Bronco_bill]

Same problem

Everything but the Rad cap is new in the cooling system and I am getting the same thing. Anyone think that if the rad has a slight blockage itmay cause this. Anyway I'll try a new cap first.
Thanks
Bill

 

[MikeTEC]

My new 13 lb Stant cap did not help, Bill. So I may try a 16 lb. cap. So does anyone think the additional 3 lbs. of pressure in the system of a 16 lb. cap might cause a waterpump or gasket leak elsewhere? My radiator is new and I still have the fluctuation. Thanks Mike