351W overheating- HELP PLEASE!?!?! - Page 2 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #16 of 77 (permalink) Old 05-17-2010, 05:51 AM Thread Starter
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Re: 351W overheating- HELP PLEASE!?!?!

Another update! I reinstalled the reconditioned heads on the weekend - ran into a few problems on the way but sorted them out. I went for the first real long run tod and the B#%&%y thing is still overheating!!! Now I'm really stumped. I triple checked everything along the way and cant find the problem.
I'm now starting to think of some sort of water blockage? Maybe these edelbrock performer RPM heads dont suit late EFI windsors??? Or maybe over-bored cylinders?? (there was no mark on the top of the pistons?)
ANYONE got ANY ideas???!! I'm stuck!

Before you ask - new radiator and cap, new thermostat (tested it too), reconditioned heads, new thermostat housing, checked water pump, head gaskets on the correct way,viscous hub fan draws heaps of air, no coolant leaks, temp gauge correct

What am I missing here???

1963 Galaxie 500 convertible
1964 Galaxie 500XL Fastback
1971 Galaxie 500 2Dr
3 x 1964 Galaxie 500 sedans
One huge shed and a very understanding wife!
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post #17 of 77 (permalink) Old 05-17-2010, 06:17 AM
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Re: 351W overheating- HELP PLEASE!?!?!

WHAT is happening when it OVERHEATS? Please describe it in Detail.

Don't simply tell me that your gauge pegs after a few minutes of driving, tell me something that will give clues!

HOW HOT IS THE COOLANT GETTING?
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post #18 of 77 (permalink) Old 05-17-2010, 06:56 AM Thread Starter
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Re: 351W overheating- HELP PLEASE!?!?!

I dont really know what else I can tell you?? the temp gauge on the truck works fine. I can tell you the symptoms did not change today. I drove the truck , the temp gauge steadily increased until it was just before hot. It only stopped going up because I had made it home from work. Felt the engine it was definately far too hot. I do know the feel of a normal running motor. Everything was real hot - motor radiator ,top and bottom hose.

Just spoke to a good mechanic friend of mine and ran through in great detail everything that has happened so far. His only comment was I had done every thing right and maybe check if the heads are actually compatible with that block (maybe early carby heads on EFI-are they different??)

Also thinking the truck has done only 30,000miles in the last ten years, and I think very little maintenance in that time, could it be some sort of water/corrosion blockage in the block??

Surely these trucks can run for more than 20 minutes without heating?!

1963 Galaxie 500 convertible
1964 Galaxie 500XL Fastback
1971 Galaxie 500 2Dr
3 x 1964 Galaxie 500 sedans
One huge shed and a very understanding wife!
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post #19 of 77 (permalink) Old 05-17-2010, 06:59 AM Thread Starter
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Re: 351W overheating- HELP PLEASE!?!?!

Sorry only had the trucks temp gauge on my tonight (no seperate numerical gauge) so I cant give you degrees.

Any help with my little detail would be great - even a direction to start looking.

1963 Galaxie 500 convertible
1964 Galaxie 500XL Fastback
1971 Galaxie 500 2Dr
3 x 1964 Galaxie 500 sedans
One huge shed and a very understanding wife!
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post #20 of 77 (permalink) Old 05-17-2010, 07:11 AM
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Re: 351W overheating- HELP PLEASE!?!?!

I can understand that everything feels hot but you MUST get a temp gauge on the radiator and the engine in different positions to tell you the true temp of the engine!

That gauge COULD be faulty no matter what you feel in the engine bay...

Get a digital laser temp gauge, spend the $35 bucks on it. Besides being useful it's FUN to play with
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post #21 of 77 (permalink) Old 05-17-2010, 09:53 AM
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Re: 351W overheating- HELP PLEASE!?!?!

Did the machine shop pressure check and surface the heads?

Let me add a little something here.

Putting aluminum heads onto an engine presents problems that require more frequent maintenance. If the coolant is not changed frequently (minimum every two years) it will turn acidic and start eating things like head gaskets and aluminum material.

There are special head gaskets to use (graphite coated and impregnated) to allow for the different expansion rates for the dissimilar materials (iron-aluminum) to slide on one another. Did you check the machined surface of the lower intake for damage?

You need to pressurize the system and see if it holds overnite. Start it and allow it to warm up and see how much pressure is produced.

Do the leaking exhaust gas test again. There is an internal leak somewhere most likely.

You are not using cheap a$$ box store CHI-COM parts are you?

DISCLAIMER-

The above posted information is in my opinion only. It may contain copy and paste material(s). Your opinion(s) and mileage may vary.

Last edited by KULTULZ; 05-17-2010 at 10:02 AM. Reason: LINGERING THOUGHTS.
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post #22 of 77 (permalink) Old 05-17-2010, 11:34 AM
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Re: 351W overheating- HELP PLEASE!?!?!

What temp is the engine at when you "feel" it's Overheating?

That's by far the most important question you can be asked! All else is Speculation until the Temp is found out!
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post #23 of 77 (permalink) Old 05-17-2010, 12:55 PM
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Re: 351W overheating- HELP PLEASE!?!?!

Here is something else to speculate about until we find out what the real temp of the engine is. You stated in your first post that you had the water pump off, but that it seemed fine. Did you actually check that the impeller was tight on the shaft? I have seen impellers that were loose and under load of moving the water, would not spin at shaft speed causing the water pump to not move enough water. Not a very likely cause, but one none the less. And are you sure all of the air has been bled out of the engine?
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post #24 of 77 (permalink) Old 05-17-2010, 12:58 PM
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Re: 351W overheating- HELP PLEASE!?!?!

Quote:
Originally Posted by danh View Post
engine must be hot to completely fill the cooling system
not true!
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post #25 of 77 (permalink) Old 05-17-2010, 02:05 PM
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Re: 351W overheating- HELP PLEASE!?!?!

Quote:
Originally Posted by Bullitt331 View Post
not true!
Ditto! You are 100% correct!
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post #26 of 77 (permalink) Old 05-17-2010, 02:44 PM
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Re: 351W overheating- HELP PLEASE!?!?!

Dumb question maybe....but are you sure all the air has bee purged from the system?
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post #27 of 77 (permalink) Old 05-19-2010, 05:33 AM Thread Starter
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Re: 351W overheating- HELP PLEASE!?!?!

Hi All, a quick update. I did a long update last night, hit submit reply and it just wiped it, so i gave up.
Now try again, Have rechecked everything with the heads guys , as expected , they did everything right. I'm ruling out the heads for now.
Today went to a radiator joint they check the whole system and cleared thermostat, water pump and radiator, but came up with some interesting findings....

1963 Galaxie 500 convertible
1964 Galaxie 500XL Fastback
1971 Galaxie 500 2Dr
3 x 1964 Galaxie 500 sedans
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post #28 of 77 (permalink) Old 05-19-2010, 05:42 AM Thread Starter
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Re: 351W overheating- HELP PLEASE!?!?!

The radiator shop, iniatially refilled the radiator(as it overheated and dropped all its coolant upon arrival), then let it run for a few minutes at idle with the radiator cap off,while watching the temp gauge rise away! Then shut the engine off and ....WOOOFF. A big gush of water came back out the radiator. the guy said thermo is block , remove it.
Then i removed the thermostat and drove it again. Sure enough, still overheating. I left the truck with the guy and he ran a further series of tests. The results came back - water pump, thermostat, radiator fine. the engine is overheating at the back of the block ( front seems fine). He suspects some sort of blockage, maybe head gaskets on backwards. I know this is not the case, but do suspect some blockage in the rear of the block.....

1963 Galaxie 500 convertible
1964 Galaxie 500XL Fastback
1971 Galaxie 500 2Dr
3 x 1964 Galaxie 500 sedans
One huge shed and a very understanding wife!
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post #29 of 77 (permalink) Old 05-19-2010, 05:50 AM Thread Starter
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Re: 351W overheating- HELP PLEASE!?!?!

The guy also added in that the vehicle is going from cold to normal operating temperature and continuing to rise and also pressurising the radiator. (sounds like a head gasket??). the radiator is showing a lot of bubbles coming through.

Now I'm stumped!! Bare in mind, the symtoms have not changed in since i bought the truck 3 weeks ago. Since then new radiator, thermostat , water pump off, fully reconditioned heads, including crack testing, facing etc.. Head gaskets are definately on the right way.

Any suggestions??

1963 Galaxie 500 convertible
1964 Galaxie 500XL Fastback
1971 Galaxie 500 2Dr
3 x 1964 Galaxie 500 sedans
One huge shed and a very understanding wife!
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post #30 of 77 (permalink) Old 05-19-2010, 05:57 AM Thread Starter
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Re: 351W overheating- HELP PLEASE!?!?!

Also like to say, the radiator guy did not do a TK test (exhaust gases in coolant). I want to try to do that tomorrow.

I'm thinking remove core plugs and poke around the block to try to dis lodge some sort of blockage. Have heard of people leaving old core plugs in the block and having such issues. This would not explain the bubbles in the radiator though???

Finally can someone please tell me the reason you would need to know the EXACT temperature the car is overheating at?? I can't see the point! Isn't the fact that it is overheating at all, enough to say there is a fault?

PLEASE everyone keep posting
Thanks again
Galman

1963 Galaxie 500 convertible
1964 Galaxie 500XL Fastback
1971 Galaxie 500 2Dr
3 x 1964 Galaxie 500 sedans
One huge shed and a very understanding wife!
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