New Problem
Thread Starter
|
Freshman User
Joined: Dec 2016
Posts: 42
Likes: 0
New Problem
So I was initially having intermittent over heating issues (about once every 3 weeks or so). I put a new water pump in and thought that I was in the clear. The truck is still getting upwards of 220 degrees and the thermostat is not opening. Heat comes on initially but then disappears. Both heater hoses appear to be cold. Well the "in" hose is warm initially but then I lose heat and it goes cold.I shut the truck off and began venting the reservoir cap and all the sudden it was like the floodgates opened. I could hear the rush of coolant through the upper hose. Heat was restored and the truck runs fine. Any ideas on this? Could I have possibly gotten another bad thermostat. This one is new (Stant superstat 195 degree)
I don't know what to do anymore!
Thread Starter
|
Freshman User
Joined: Dec 2016
Posts: 42
Likes: 0
I just don't understand why the heater hoses are cold, then the thermostat opens, they heat up, I get heat and everything is dandy. Does the coolant have to flow that way for some reason? (other than heat). The system should still work with out heater hoses and a heater core (minus having heat) should it not?
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Clogged Radiator? Wow hard to tell. I know head gasket issues do weird thing with temp..Either way when the thermostat see's temp it should open unless pressure keeping it closed...Do you have a infrared temp gun you could shoot at the therm housing or block? Shouldn't trust truck gauge..
Postmaster
Joined: Jan 2012
Posts: 2,693
Likes: 3
From: West of Chicago
Did you buy a cheap parts house thermostat? ExxV10 had a similar issue with aftermarket parts, Is the cooling fan working correctly?
OEM Motorcraft is the only good thermostat for these trucks.
OEM Motorcraft is the only good thermostat for these trucks.
Trending Topics
Thread Starter
|
Freshman User
Joined: Dec 2016
Posts: 42
Likes: 0
It's a Stant Superstat 195 degree. I have read that the motorcraft part is all that works for these trucks a few other places (and heard it too). Cooling fan seems to be working (in that it is spinning). Fan clutch appears to be working too, though I didn't change it when I did the water pump
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Postmaster
Joined: Jan 2012
Posts: 2,693
Likes: 3
From: West of Chicago
It's a Stant Superstat 195 degree. I have read that the motorcraft part is all that works for these trucks a few other places (and heard it too). Cooling fan seems to be working (in that it is spinning). Fan clutch appears to be working too, though I didn't change it when I did the water pump
Thread Starter
|
Freshman User
Joined: Dec 2016
Posts: 42
Likes: 0
DOH!
So apparently it helps to make sure the system is full of coolant for proper function. I couldn't expect me to have heat and the thermostat to open when it should when i was 1.5 gallons low. Live and learn I guess. I got so tied up with the burping the system that I forgot to refill it. When I did it just kept drinking it down. Took it out for a spin and I had heat within 5 minutes and the thermostat opened at around 206* according to my device plugged in to the OBDII port.
Postmaster
Joined: Jan 2012
Posts: 2,693
Likes: 3
From: West of Chicago
So apparently it helps to make sure the system is full of coolant for proper function. I couldn't expect me to have heat and the thermostat to open when it should when i was 1.5 gallons low. Live and learn I guess. I got so tied up with the burping the system that I forgot to refill it. When I did it just kept drinking it down. Took it out for a spin and I had heat within 5 minutes and the thermostat opened at around 206* according to my device plugged in to the OBDII port.
Thread
Thread Starter
Forum
Replies
Last Post
Jon Barnes
Explorer, Sport Trac, Mountaineer & Aviator
8
Dec 17, 2014 11:05 AM
adam.hilberath
1987 - 1996 F150 & Larger F-Series Trucks
7
Nov 11, 2012 01:44 PM