Piston ID 5.4
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Piston ID 5.4
My mechanic neighbor has an F-250 with an aftermarket rebuilt 5.4 that dropped a valve. Heads are done, but google isn't much use when it comes to matching this piston.
Flat top reads: R5675 - 0.75
Under one skirt has 90L80
Under opposite skirt has CDHT in the middle, and T601 (Al type?) next to it
Or does this even matter, and he should just get any 0.75 over piston?
Flat top reads: R5675 - 0.75
Under one skirt has 90L80
Under opposite skirt has CDHT in the middle, and T601 (Al type?) next to it
Or does this even matter, and he should just get any 0.75 over piston?
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
No such thing as a .75 over piston. The biggest you can safely go is .030. Those pistons appear to be generic TRW cast pistons. If he dropped a valve there is going to be damage to the rod also and possibly cylinder fracturing. I wouldn't attempt to swap a new piston into a engine it will throw the balance off if nothing else.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Okay .75mm is roughly .030 inches so it's at max bore, the weird part is the pistons listed are in inches and I have no part number to give you. I can say it's not a Ford reman as Ford won't go past .020 because of the reliability issues.
More Turbo
Joined: Sep 2003
Posts: 514
Likes: 27
IT DOESN'T MATTER! It just matters what year so the piston top has the right configuration.
Your mechanic friend should already know that the aftermarket pistons are stock replacements and as such they weigh about the same as stock. So buy wherever he can buy a single piston.
In the Sealed Power line the part number will be HxxxCP for set of 8 and WHxxxCP for just one.
BTW, TRW hasn't made pistons for a very long time.
R.
Your mechanic friend should already know that the aftermarket pistons are stock replacements and as such they weigh about the same as stock. So buy wherever he can buy a single piston.
In the Sealed Power line the part number will be HxxxCP for set of 8 and WHxxxCP for just one.
BTW, TRW hasn't made pistons for a very long time.
R.
Last edited by dogdays; Jan 22, 2019 at 01:11 PM. Reason: adding stuff
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