Questions ON 351 roller block
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Cross-Country
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Questions ON 351 roller block
Have a 87 f150 302 --picked up a 351 a while back .Been in my Garage for some time now , Guy I bought it from didnt know much about it so it was "A PIG IN THE POKE " buy .
Noticed it had a 5.0 intake .plenum whatever, So I got the grime off the block -lower passenger side -- & got the casting no. Its a F4TE which is a roller block from a 94-96 351.
Question 1 ; didnt think a 5.0 intake would fit a 5.8 ,
Question 2 : After reading about them & thinking I had bought a diamond in the rough , found out the blocks of these generation engines were famous for cracked blocks .
I think the crack occurs in the back of the block where the tranny bolts up to ?
So before I go forward in getting this engine in my truck , whats is yalls advice on this . any info appreciated -- Some guy said on some post that you could use JB weld & fix these cracks - dont have a clue how this would be done ? Others said they have braise welded the crack .
Or is this crack an issue mainly on high performance engines
Noticed it had a 5.0 intake .plenum whatever, So I got the grime off the block -lower passenger side -- & got the casting no. Its a F4TE which is a roller block from a 94-96 351.
Question 1 ; didnt think a 5.0 intake would fit a 5.8 ,
Question 2 : After reading about them & thinking I had bought a diamond in the rough , found out the blocks of these generation engines were famous for cracked blocks .
I think the crack occurs in the back of the block where the tranny bolts up to ?
So before I go forward in getting this engine in my truck , whats is yalls advice on this . any info appreciated -- Some guy said on some post that you could use JB weld & fix these cracks - dont have a clue how this would be done ? Others said they have braise welded the crack .
Or is this crack an issue mainly on high performance engines
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
It won't... it's a totally different block.
No and No. 5.0 blocks are known to crack in half with forced induction builds in the 500hp territory, but the 5.8 block has been reliably built into the 750hp range and more. Some 5.8 roller blocks have shown cracking in the cam bearing webs, this doesn't seem to affect operation or reliability on a stock motor but would be a concern for a performance buildup.
Cargo Master
Joined: Mar 2010
Posts: 3,331
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From: Laramie, WY
The 5.0L upper plenum physically bolts right into place on a 5.8L lower intake manifold. So it is possible that's what is going on here, but I don't think it's a common thing to do outside of those of us that have ported our lower 5.8L intake manifolds to match the larger 5.0L upper. You might have bought a 5.0L, hopefully it was cheap.
My roller block has those cam bearing area cracks. I built the motor anyway, sort of an experiment. 70k miles so far and no trouble, but definitely not pushing limits of power on the block. I'd think twice about boosting this engine but not concerned for modest power levels.
My roller block has those cam bearing area cracks. I built the motor anyway, sort of an experiment. 70k miles so far and no trouble, but definitely not pushing limits of power on the block. I'd think twice about boosting this engine but not concerned for modest power levels.
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Cross-Country
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I dont think the casting no. on the block dont lie --Its a 5-8 with a 5.0 upper intake --dont know why the 5.0 intake is on it ??
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FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
F4TE is just a date code and it is not unique to the 5.8 block.
Post up a picture of your motor, not a closeup something that shows the whole motor form above.
Post up a picture of your motor, not a closeup something that shows the whole motor form above.
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Cargo Master
Joined: Mar 2010
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From: Laramie, WY
Decoding the first four digits of a Ford casting number looks something like this:
F=decade of 1990
4=4 is year of the decade (meaning 1994 in this case)
T=truck
E=engine
So nothing there says anything about displacement.
However, I am also not seeing any reference to 302 blocks with a casting number newer than E7? After 1987 they were all roller ready 302 blocks, and far as I know there were no additional changes to the block moving forward.
F4TE-AA is listed as a 351W on several sites. Regardless, a couple pictures would confirm 351W vs 302.
F=decade of 1990
4=4 is year of the decade (meaning 1994 in this case)
T=truck
E=engine
So nothing there says anything about displacement.
However, I am also not seeing any reference to 302 blocks with a casting number newer than E7? After 1987 they were all roller ready 302 blocks, and far as I know there were no additional changes to the block moving forward.
F4TE-AA is listed as a 351W on several sites. Regardless, a couple pictures would confirm 351W vs 302.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Pictures will settle this in seconds... lets see some pics.