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  Mustangsandmore Forum Archive
  '74 to '78 -- The Mustang II
  2.8 cooling problem

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Author Topic:   2.8 cooling problem

Posts: 6
Registered: May 2006

posted 05-13-2006 01:33 PM     Click Here to See the Profile for volksnut        Reply w/Quote
I changed the water pump, thermostat, and coolant, (the old pump had the bearing going out) now it runs hotter than before, top hose is hot bottom hose is cold... I've changed the thermostat twice thinking it wasn't opening' a 195 degree unit....I've changed the cap, and pressure tested the system also, also tried bleeding the system of all air? The car ran with the needle in the center of the gauge before, now it runs 3/4 to the line before the "H" on gauge....what could it be?

[This message has been edited by volksnut (edited 05-13-2006).]


Posts: 48752
From: Saco, Maine
Registered: May 99

posted 05-13-2006 07:18 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
Did the part store give you the right thermostat? The 2.8 uses a thermostat that has a round plate at the end of the element that blocks off a port behind it.

The bottom hose staying cold is trobling, like the flow through the radiator is restricted.

'70 Mustang Mach 1 - '70 Mustang Convertible - '72 Mustang Sprint - '94 F-150 XL


Posts: 290
From: Western Canada
Registered: Dec 2005

posted 05-15-2006 09:40 AM     Click Here to See the Profile for Whitson        Reply w/Quote
I ALWAYS had trouble with those 2.6 & 2.8's air locking on me after draining the cooling system. My cure was to put a joiner in the highest heater hose, fill from that heater hose (with the rad cap off) until it started coming out the neck of the rad, then join the hoses back up, cross my fingers and start the car. Good luck!

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