Replace the modular
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From: Louisville,Ky.
The 4.6 actually has more compression than a 5.4. 9.3 to 1 vs 9.0 to 1. The 5.4 block is taller and wider to accomodate the longer stroke. Cylinder pressures are nearly identical because they use the same heads and camshafts.
Most of the headgasket problems that I have read about are oil leaking out of the back of the head gasket. I believe this was on the 4.6's though.
Jimmy
Most of the headgasket problems that I have read about are oil leaking out of the back of the head gasket. I believe this was on the 4.6's though.
Jimmy
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Joined: Jul 2002
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From: Long Island USA
Originally posted by lxman1
The 4.6 actually has more compression than a 5.4. 9.3 to 1 vs 9.0 to 1. The 5.4 block is taller and wider to accomodate the longer stroke. Cylinder pressures are nearly identical because they use the same heads and camshafts.
Most of the headgasket problems that I have read about are oil leaking out of the back of the head gasket. I believe this was on the 4.6's though.
Jimmy
The 4.6 actually has more compression than a 5.4. 9.3 to 1 vs 9.0 to 1. The 5.4 block is taller and wider to accomodate the longer stroke. Cylinder pressures are nearly identical because they use the same heads and camshafts.
Most of the headgasket problems that I have read about are oil leaking out of the back of the head gasket. I believe this was on the 4.6's though.
Jimmy
I didn't mean static cylinder pressure, I should have elaborated...
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Joined: Sep 2003
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From: Near Wamego KS
"Most of the headgasket problems that I have read about are oil leaking out of the back of the head gasket. I believe this was on the 4.6's though.
Jimmy"
Perfect discription of the blown head gaskets on the my brothers' 5.4Ls, I have talked to mechanics that claim they have NEVER replaced a head gasket on a 4.6L and the ones that have said they have only done so with engines that have been "messed with" to try and get more power... ie Mustangs with teenage drivers/mechanics.
Must of the 5.4L problems I know of where related to F250s especially Super Duties. Just too much mass and wind resistance for the little engine to move around. Always seemd like you where pushing it hard even going down the road empty.
Actually the Ranger was an American truck with a German engine and a Jap transmission - don't ask me how they got all the combatants from WW2 to work together.
Jimmy"
Perfect discription of the blown head gaskets on the my brothers' 5.4Ls, I have talked to mechanics that claim they have NEVER replaced a head gasket on a 4.6L and the ones that have said they have only done so with engines that have been "messed with" to try and get more power... ie Mustangs with teenage drivers/mechanics.
Must of the 5.4L problems I know of where related to F250s especially Super Duties. Just too much mass and wind resistance for the little engine to move around. Always seemd like you where pushing it hard even going down the road empty.
Actually the Ranger was an American truck with a German engine and a Jap transmission - don't ask me how they got all the combatants from WW2 to work together.
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Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Must of the 5.4L problems I know of where related to F250s especially Super Duties. Just too much mass and wind resistance for the little engine to move around. Always seemd like you where pushing it hard even going down the road empty.
Actually the Ranger was an American truck with a German engine and a Jap transmission - don't ask me how they got all the combatants from WW2 to work together. [/B]
Actually the Ranger was an American truck with a German engine and a Jap transmission - don't ask me how they got all the combatants from WW2 to work together.
[/B]
As to the WWII combatants, that's probably the ONLY reason they are all working together...
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