cooling system nightmare!!!!!! help please!!!!
Thread Starter
|
New User
Joined: Nov 2009
Posts: 16
Likes: 0
cooling system nightmare!!!!!! help please!!!!
i have a 351m in my 1989 f350. ever since i got it which is about 6months ago. wen i take her out she runs hot. i start her up go play around in the mudd and cruise and stuff and then about 10 - 15 mins later shes hot. i changed the thermostat to a 180 degree but still ran hot. i believe the water pump work because i have watched the water in the radiator being pumped. i rly want to get this fixed so i can ran her more than just 10 mintues if anyone can help i would greatly apperciate it! old thermostat had the guts taken out of it
i ain't rite
Joined: Mar 2005
Posts: 65,448
Likes: 5,517
From: Marlboro Mental Hospital.
351M, or 351W?
an 89 should have a 351W in it, unless someone got creative and swapped the older engine in it.
V belts, or serpentine belts?
it is possible it has the wrong water pump on it, and the pump is spinning backwards.
it is also possible that the radiator is plugged up and not cooling the coolant.
an 89 should have a 351W in it, unless someone got creative and swapped the older engine in it.
V belts, or serpentine belts?
it is possible it has the wrong water pump on it, and the pump is spinning backwards.
it is also possible that the radiator is plugged up and not cooling the coolant.
Post Fiend
Joined: Jun 2004
Posts: 8,147
Likes: 1
From: Joppa, Maryland
-Make sure the radiator is clean, inside and out.. run the hose through it back to front to wash out any crud between the cooling fins if you're playing in the mud a whole lot. Flush out the inside by running the hose through it as well.
-Check timing?
-Do you have a fan shroud?
-Is your fan clutch locking up when it should or is it a solid mount fan? Is the belt tight and not slipping?
-Try running it without a thermostat at all just to see, though sometimes this makes it worse as the water doesn't have time to cool down if there isn't anything slowing it down to hold it in the radiator.
-Check timing?
-Do you have a fan shroud?
-Is your fan clutch locking up when it should or is it a solid mount fan? Is the belt tight and not slipping?
-Try running it without a thermostat at all just to see, though sometimes this makes it worse as the water doesn't have time to cool down if there isn't anything slowing it down to hold it in the radiator.
Thread Starter
|
New User
Joined: Nov 2009
Posts: 16
Likes: 0
Trending Topics
i ain't rite
Joined: Mar 2005
Posts: 65,448
Likes: 5,517
From: Marlboro Mental Hospital.
check direction of rotation of the water pump. you may be spinning it in reverse. i have seen it happen quite a few times when people put serpentine belts on engines designed to run V-belts.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
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
Post Fiend
Joined: Jun 2004
Posts: 8,147
Likes: 1
From: Joppa, Maryland
Good catch Tom. I wonder if they make a serp water pump for 351M. I was going to say I don't think they make a serpentine setup for the 335 motors, but that's just a matter of swapping pulleys, right?
i ain't rite
Joined: Mar 2005
Posts: 65,448
Likes: 5,517
From: Marlboro Mental Hospital.
if the belt is driving the water pump from the bottom of the pulley, it will spin one way. reverse the belt to drive the pump from the top of the pulley, and it will spin the pump the other way.
if it is hard to think of it the way i explained it, take a beer can and poke a rod through it to use as an axle.. take a belt of some kind and spin the can with the belt on the bottom. pull the belt from left to right. notice the direction the can spins.
now put the belt on the top of the can. pull the belt from left to right again. you will now notice the can is spinning in the opposite direction.
Lead Driver
Joined: Sep 2010
Posts: 7,005
Likes: 2
even easier. just reverse the belt.
if the belt is driving the water pump from the bottom of the pulley, it will spin one way. reverse the belt to drive the pump from the top of the pulley, and it will spin the pump the other way.
if it is hard to think of it the way i explained it, take a beer can and poke a rod through it to use as an axle.. take a belt of some kind and spin the can with the belt on the bottom. pull the belt from left to right. notice the direction the can spins.
now put the belt on the top of the can. pull the belt from left to right again. you will now notice the can is spinning in the opposite direction.
if the belt is driving the water pump from the bottom of the pulley, it will spin one way. reverse the belt to drive the pump from the top of the pulley, and it will spin the pump the other way.
if it is hard to think of it the way i explained it, take a beer can and poke a rod through it to use as an axle.. take a belt of some kind and spin the can with the belt on the bottom. pull the belt from left to right. notice the direction the can spins.
now put the belt on the top of the can. pull the belt from left to right again. you will now notice the can is spinning in the opposite direction.
i ain't rite
Joined: Mar 2005
Posts: 65,448
Likes: 5,517
From: Marlboro Mental Hospital.
it drove me crazy the first time i ran into an overheat problem with a serpentine belt vehicle. a guy towed on to the shop saying it was running hot. i opened the rad to pressure test it and everything was good. then i fired it up and saw no water flow. took the water pump out and it was good. put the pump back in and put the belt on the way i took it off, and it was hot again.
finally broke out the book, and saw the guy put the new belt on the wrong way. it cost him $150 for that oopsie.
ever since that day, i pay close attention to belt installation diagrams.
i wasted 5 hours diagnosing a problem that was nothing more than owner stupidity.
finally broke out the book, and saw the guy put the new belt on the wrong way. it cost him $150 for that oopsie.
ever since that day, i pay close attention to belt installation diagrams.
i wasted 5 hours diagnosing a problem that was nothing more than owner stupidity.
Thread
Thread Starter
Forum
Replies
Last Post
dspy8083
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
6
Oct 14, 2013 10:35 AM
53fatfndr
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
53
Nov 17, 2007 07:04 PM
luke_trash
1987 - 1996 F150 & Larger F-Series Trucks
19
Mar 8, 2005 02:09 PM
