71 T/A 455 block ID help

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71TAmartin

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Trying to get this 71 T/A up and running, having an overheat problem. Making sure I don't have any mismatched parts.
Block #485428 right side of distributor, date code looks like D082 left side of distributor.
0502261 with YH under it passenger side of front cover, below that still passenger side of front cover is (first 3 digits or hard to read) 22B or P then 406192 .
Heads have a 191 with a large 2 under it.
Intake is 483674.
Thank you for any ID help.
 
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Not sure why you think this will help with an overheating problem?
When does it overheat, local traffic, highway, idle?
Are you familiar with issues around the timing cover spacer plates and water pump?
What are you setting the initial timing to?
Are you using manifold or ported vacuum advance?
What temperature thermostat are you using?
Did you check the fan clutch?
 
The YH with that casting number is a 72 455. Not HO.
The intake is 1971 455 HO
Head is 1971 455 HO
Date April 8 1972
 
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melsg5 said:
The YH with that casting number is a 72 455. Not HO.
The intake is 1971 455 HO
Head is 1971 455 HO
Date April 8 1972
Click to expand...

Thank you for the ID help.
This was a completely disassembled engine (in box's) when my buddy bought this car. He just assembled it without having the parts checked.
I want to rule out a parts incompatibility issue, like cooling passages in different places from mismatched parts.
It heats up very fast at the heads even with coolant flowing thru the radiator, acts like a cooling blockage at the heads.
May have to disassemble to inspect.
______________________________
 
You have no parts incompatibility based on the numbers you provided.
What part number were the head gaskets and intake manifold gaskets?
It sounds like you havent driven the car?
Can you answer the questions in post #2?
 
melsg5 said:
You have no parts incompatibility based on the numbers you provided.
What part number were the head gaskets and intake manifold gaskets?
It sounds like you havent driven the car?
Can you answer the questions in post #2?
Click to expand...

Haven't even driven it yet, gets very hot very fast just idling for about 10 min.
I am not familiar with the timing cover spacer plate and water pump issues on a Pont 455
( I do know all the inherent issues with the Buick 455 )
Initial timing is 10 btdc (sticker calls for 12 btdc )
Mechanical advance and vacuum advance are functional and using ported vacuum.
No t-stat right now, has very good coolant flow. Has a good 4 core radiator.
Clutch fan is good.
Don't know the part numbers of the head gaskets or intake gaskets.
I've dealt with a lot of Buick big block concerns, mainly looking for those Pont issues I may not be aware of.
I really appreciate any info, I am always willing share any knowledge I may have.
Just trying to help a buddy out.
I am leaning toward a head gasket issue, maybe. Doesn't show up with a block tester.
 
Here is a link to the water pump plates Water Pump Mods
Set the timing to 12 degrees.
Unless you want to stay stock use manifold vacuum.
Depending on what part of the country you are in temperature wise put in a 180 thermostat, wide mouth, like Stewarts. If a very warm area you can even go to 160.
When you say block tester, do you mean compression test?
Have you tried a coolant hydrocarbon test?
 
melsg5 said:
Here is a link to the water pump plates Water Pump Mods
Set the timing to 12 degrees.
Unless you want to stay stock use manifold vacuum.
Depending on what part of the country you are in temperature wise put in a 180 thermostat, wide mouth, like Stewarts. If a very warm area you can even go to 160.
When you say block tester, do you mean compression test?
Have you tried a coolant hydrocarbon test?
Click to expand...


Good info on the water pump mods, I will have to look into that.
It passed the hydrocarbon test, if the head gasket is compromised, its not showing up at the radiator.
I will move the vacuum advance to manifold vacuum, I understand the benefits of timing advancement, tends to run cooler.
Still feel I have a blockage somewhere, heats up super fast. May have to check out those head gaskets.
Who's head and intakes gaskets work best on these? You had mentioned what gasket part numbers were used.

Thanks a lot.
Rod.
______________________________
 
I would only use Felpro easy to look up the correct number.
No chance anything is blocking the exhaust?
 
melsg5 said:
I would only use Felpro easy to look up the correct number.
No chance anything is blocking the exhaust?
Click to expand...


I don't think so, but anything is possible. The engine was completely disassembled and in box's when he bought it, and I wasn't there when it was assembled. I think I may just be dealing with the original problem and why it was apart.
 
Was anything checked for cracks, head, block?
 
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