Fuel Pump Eccentric?
Senior User
Joined: Jan 2006
Posts: 292
Likes: 3
The fuel pump eccentric pushes the arm up and down on a mechanical fuel pump . Some engines were built for use with mechanical fuel pumps but never used with them thus having this eccentric in them and not needed.
If yours has EFI you don't need an eccentric but if you remove it you you have to replace it with a thick washer .
If yours has EFI you don't need an eccentric but if you remove it you you have to replace it with a thick washer .
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Junior User
Joined: May 2010
Posts: 52
Likes: 0
From: Livonia, Mich
I don't see how that would effect end play, please correct me if I'm wrong, but based off the Chilton. if its out of spec for end play to replace the thrust plate. The end play spec in my Chilton states 0.0010 - 0.0070, is this correct for an 88 351W?
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
If it won't then disregard my post. I honestly, haven't dealt with this issue. My thought was simply that if you were replacing something of a given thickness with something OTHER than that exact part that the question of end play could be an issue.
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Junior User
Joined: May 2010
Posts: 52
Likes: 0
From: Livonia, Mich
Its all good, it actully made me read the manual. Looking at things from all angels is always a good thing. I wouldn't have thought of checking the end play and had just replaced the timing chain. I plan on checking the end play and replace whats needed.
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Cargo Master
Joined: May 2004
Posts: 3,007
Likes: 5
Something needs to keep the camshaft from moving out of position. It might be that the fuel pump eccentric prevents it from moving out of position by rubbing on the timing chain cover.
Yes, read the directions (Service Manual is best direction), from beginning to end, understand the directions, then follow the directions.
Or do what I do, do it twice, sometimes thrice.
Yes, read the directions (Service Manual is best direction), from beginning to end, understand the directions, then follow the directions.
Or do what I do, do it twice, sometimes thrice.
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Junior User
Joined: May 2010
Posts: 52
Likes: 0
From: Livonia, Mich
That's what the thrust plate is for.It Holds the cam it place
If the eccentic touched the timing chain cover, it would chew right through it and metal shaving would get into the oil.
If the eccentic touched the timing chain cover, it would chew right through it and metal shaving would get into the oil.
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