Engine Water Temp.
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Freshman User
Joined: Jul 2011
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From: I live in central Georgia
Engine Water Temp.
I am sure this has been discussed before but did not find a thread on it.
Here goes......I have a 78 F 150 that I purchased from a previous owner that has a 460 out of a 75 Lincoln. The PO had a new radiator put in the truck and it looks to be the right radiator for the application with the previous 351 M that was in the truck originally.
The problem I am having is when I drive the truck at about 65 to 70 mph for a distance of 5 to 10 miles the temp gauge does not show that the engine is running hot but when I stop and turn the engine off and after a few minuets get back in to restart the engine it is hard to start and the temp gauge will show that the engine temp is hot but not in the red zone. After the engine starts it will start to cool down immediately. The water level is full and it does not seem to be pushing any water out the over flow hose.
The engine does not have a fan shroud (which I know it needs one to operate normally) but was wondering if there is any other reason to cause the engine to do this. And it does have AC on the engine but does not work.
Please help......Thanks in advance!!!
Here goes......I have a 78 F 150 that I purchased from a previous owner that has a 460 out of a 75 Lincoln. The PO had a new radiator put in the truck and it looks to be the right radiator for the application with the previous 351 M that was in the truck originally.
The problem I am having is when I drive the truck at about 65 to 70 mph for a distance of 5 to 10 miles the temp gauge does not show that the engine is running hot but when I stop and turn the engine off and after a few minuets get back in to restart the engine it is hard to start and the temp gauge will show that the engine temp is hot but not in the red zone. After the engine starts it will start to cool down immediately. The water level is full and it does not seem to be pushing any water out the over flow hose.
The engine does not have a fan shroud (which I know it needs one to operate normally) but was wondering if there is any other reason to cause the engine to do this. And it does have AC on the engine but does not work.
Please help......Thanks in advance!!!
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 83
From: NorCal
Do not rely on the stock gauge. They are inherently inaccurate. Install a quality aftermarket gauge with its matching sender to get the true temp reading.
Yes, run a shroud. Your engine will thank you.
Yes, run a shroud. Your engine will thank you.
Posting Guru
Joined: Nov 2011
Posts: 1,302
Likes: 5
From: Burlington, WI
Sounds to me like it's heat soaking once it's parked. Hence why it cools off as soon as you start driving it. Really kinda sounds normal to me.
Then again the shroud will help cool the engine BEFORE you park it so...that could prevent the heat build up I suppose...
Then again the shroud will help cool the engine BEFORE you park it so...that could prevent the heat build up I suppose...
Postmaster
Joined: Nov 2011
Posts: 2,553
Likes: 10
Agree. Iron head engines in general heat up after brief shutdown (heat soak). Sounds normal.
Postmaster
Joined: Oct 2010
Posts: 4,656
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From: Northern and Southern Cal
There could be a few things going on here.
First off, when you stop your truck the water stops circulating and the engine gets hotter. So when you come back out after a few minutes your engine is so hot it's difficult to turn over. This is a normal deal. What is wrong in your case is that your system may not be doing well before that.
To find the problem you need to check anything that could contribute to your engine running on the hot side. Could be one thing or a combination of 2 or more. If it's running hot. As HIO said you may have a mixture of parts giving you bad info.
Radiator?
Pump?
Timing?
Blockage somewhere? (like heater core)
Headgasket?
And I'm sure there are a few more I forgot about.
The first thing I would do is check your timing.
If it's to advanced it can be hard to turn over. Made worse when hot.
Good luck.
First off, when you stop your truck the water stops circulating and the engine gets hotter. So when you come back out after a few minutes your engine is so hot it's difficult to turn over. This is a normal deal. What is wrong in your case is that your system may not be doing well before that.
To find the problem you need to check anything that could contribute to your engine running on the hot side. Could be one thing or a combination of 2 or more. If it's running hot. As HIO said you may have a mixture of parts giving you bad info.
Radiator?
Pump?
Timing?
Blockage somewhere? (like heater core)
Headgasket?
And I'm sure there are a few more I forgot about.
The first thing I would do is check your timing.
If it's to advanced it can be hard to turn over. Made worse when hot.
Good luck.
Postmaster
Joined: Jan 2013
Posts: 3,512
Likes: 3
From: Panama City
Is it hard to start because it doesnt want to turn over,or hard to start because it doesnt want to crank? If it turns over easily I would change the stator aka pickup coil in distributor. Notorious for getting hot and causing hard starts. If it doesnt want to turn over easily sounds like starter dragging. New starter causes a lot less draw on electrical and will usually fire right up even hot.
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Freshman User
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From: I live in central Georgia
gatorfor88......it turns over like when the timing is set a little high but it starts quickly.
there has been a water pump replaced by PO also.
don't know how many miles are on engine but when I checked the slack in the timing chain by slowly moving the distributor back and forth it seem normal.
As long as i don't drive it very hard it doesn't do this. I normally drive around 50-60 mph to keep this from happening till I figure out what to do to correct it.
I will check the items y'all spoke about in this thread and see what I come up with.
Thanks and if anyone else has an idea please throw it my way!!
there has been a water pump replaced by PO also.
don't know how many miles are on engine but when I checked the slack in the timing chain by slowly moving the distributor back and forth it seem normal.
As long as i don't drive it very hard it doesn't do this. I normally drive around 50-60 mph to keep this from happening till I figure out what to do to correct it.
I will check the items y'all spoke about in this thread and see what I come up with.
Thanks and if anyone else has an idea please throw it my way!!
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Thread Starter
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Freshman User
Joined: Jul 2011
Posts: 44
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From: I live in central Georgia
Not yet fuzzbob.......I got my heat gun with me and the next time I take it for a ride I am gonna run her pretty hard and take reading's with the heat gun to see what the temp is at different places.
Will get back to the thread with some figures and location's.
Thanks for y'alls
help!!!
Will get back to the thread with some figures and location's.
Thanks for y'alls
help!!!
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