V10 Overheating
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,242
Likes: 758
From: Houston, Texas
I'd overhaul the cooling system and slap a new thermostat and water pump in it. I'd also pull out the radiator and have a radiator shop clean it and check it for leaks. Check the fan clutch by seeing how freely it spins after a drive. If it spins too freely, replace it, if there's some resistance, it may still be good. Backflush the heater cores as well.
Be sure to use a Motorcraft Thermostat AND radiator cap, Murray seems to hold up, but anything beyond that is very risky.
Be sure to use a Motorcraft Thermostat AND radiator cap, Murray seems to hold up, but anything beyond that is very risky.
Lead Driver
Joined: Aug 2022
Posts: 5,050
Likes: 1,409
From: Oologah, OK
my radiator was so clogged up, that I just bought a new one.
for me, the slight extra expense was worth it....
over 20+ years, you don't know how much debris has been in the coolant,
just play it safe and get a new radiator.
for me, the slight extra expense was worth it....
over 20+ years, you don't know how much debris has been in the coolant,
just play it safe and get a new radiator.
Lead Driver
Joined: Aug 2022
Posts: 5,050
Likes: 1,409
From: Oologah, OK
I like their lifetime guarantee.... they ain't as cheap as others,
but their service makes up the difference
it is available in other parts stores also
Logistics Pro
Joined: Mar 2010
Posts: 3,529
Likes: 486
From: NC
All mine have been plastic tanks, only one the has leaked was from the internal transmission cooler area.
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Cross-Country
Joined: Feb 2026
Posts: 50
Likes: 20
What have you actually tested so far?
Thread Starter
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5th Wheeling
Joined: Aug 2018
Posts: 25
Likes: 4
From: MT
Actually just getting started. Removed the overflow tank and drained the radiator. Something I remembered was that as soon as I added / topped off the reservoir the overheating happened. Is it possible that the cap on the reservoir not fitting tight enough could cause the problem?
Lead Driver
Joined: Jun 2006
Posts: 5,639
Likes: 964
From: Near Yosemite CA
Actually just getting started. Removed the overflow tank and drained the radiator. Something I remembered was that as soon as I added / topped off the reservoir the overheating happened. Is it possible that the cap on the reservoir not fitting tight enough could cause the problem?
