Overheating '93 F350
Thread Starter
|
Senior Member
Joined: Mar 2001
Posts: 749
Likes: 0
From: In the shop cutting something up
Overheating '93 F350
My dad has a '93 F350 crew cab dually, 7.3 diesel - non turbo, 150++ miles, 5 spd w/ ac.
About 18 months ago they were in Arizona pulling their 35-foot 5th wheel. A rock took out the radiator. Ended up getting a new radiator, head gaskets, starter, injector pump. I've replaced all the injector lines within the last year.
About 2 weeks ago I replaced the glow plugs and module. They didn't have any trouble on the way home, but later started having trouble overheating only when pulling the 5th wheel at around 65 mph. If they stay at 55 they're okay.
I was going to put in a new water pump, thermostat, and hoses, but pressure-checked the radiator first. The filler neck was not welded all the way around and was leaking, so would not build pressure.
They pulled the trailer one or two times with no trouble. But this last weekened they went from Anderson, IN to Gatlinburg, TN and it started overheating. Had a new belt and tensioner installed - still overheated.
Could the water pump fins be going bad and it won't move enough coolant at high speeds? Any other ideas?
About 18 months ago they were in Arizona pulling their 35-foot 5th wheel. A rock took out the radiator. Ended up getting a new radiator, head gaskets, starter, injector pump. I've replaced all the injector lines within the last year.
About 2 weeks ago I replaced the glow plugs and module. They didn't have any trouble on the way home, but later started having trouble overheating only when pulling the 5th wheel at around 65 mph. If they stay at 55 they're okay.
I was going to put in a new water pump, thermostat, and hoses, but pressure-checked the radiator first. The filler neck was not welded all the way around and was leaking, so would not build pressure.
They pulled the trailer one or two times with no trouble. But this last weekened they went from Anderson, IN to Gatlinburg, TN and it started overheating. Had a new belt and tensioner installed - still overheated.
Could the water pump fins be going bad and it won't move enough coolant at high speeds? Any other ideas?
Senior Member
Joined: Nov 1998
Posts: 729
Likes: 0
From: Windsor, ON, Canada
Stupid question here, but when they installed the new rad, was it the same size rad that came out of the truck ??? When I had my rad replaced the numbers matched but the size did not ... it ended up that they had to get another rad to make the sizes fit. I had a three core and the replacement numbers came out as a two core rad. Too small even though I don't do any haulling. I am not sure if this is the problem especially when you describe about the speed issues (fine @ 55 but hot @ 65). Just something to check before you get too far into this. I would have to assume since my truck is a F150 that the F350's rads should be atleast a three core rad. Just some ideas. 
Good luck!
Have Fun & Keep on Truckin'
Dean
Good luck!Have Fun & Keep on Truckin'
Dean
Thread Starter
|
Senior Member
Joined: Mar 2001
Posts: 749
Likes: 0
From: In the shop cutting something up
Originally posted by IzzyEddy
Stupid question here, but when they installed the new rad, was it the same size rad that came out of the truck ??? When I had my rad replaced the numbers matched but the size did not ... it ended up that they had to get another rad to make the sizes fit. I had a three core and the replacement numbers came out as a two core rad. Too small even though I don't do any haulling. I am not sure if this is the problem especially when you describe about the speed issues (fine @ 55 but hot @ 65). Just something to check before you get too far into this. I would have to assume since my truck is a F150 that the F350's rads should be atleast a three core rad. Just some ideas. Good luck!
Have Fun & Keep on Truckin'
Dean
Stupid question here, but when they installed the new rad, was it the same size rad that came out of the truck ??? When I had my rad replaced the numbers matched but the size did not ... it ended up that they had to get another rad to make the sizes fit. I had a three core and the replacement numbers came out as a two core rad. Too small even though I don't do any haulling. I am not sure if this is the problem especially when you describe about the speed issues (fine @ 55 but hot @ 65). Just something to check before you get too far into this. I would have to assume since my truck is a F150 that the F350's rads should be atleast a three core rad. Just some ideas.
Good luck!Have Fun & Keep on Truckin'
Dean
www.fordpartsonline.com list 4 rad. for that truck. Standard cooling with and with out AC, and super with and with out AC.
But they don't list the size.
Senior Member
Joined: Feb 2002
Posts: 701
Likes: 0
From: NoWhere :)
any diesel should have a 4 core . sounds to me like the water pump , t stat , radiator cap should all be replaced with new antifreeze . i had a simular problem and it ended up being my waterpump .
