cam eccentric hits timing cover on 351w. What do I do?
November 5 2006 at 2:21 PM
Paul Lovett (no login) from IP address 126.96.36.199
Hey all, I'm buildind a SBF for the first time and have hit a snag. It's a 1984 351w block. I put an Elgin Industries cam and double roller timing chain in it. I have a factory timing cover year unknown.
When I try to put the timing cover on it hits the fuel pump eccentric. The timing gear and fuel pump eccentric seem to stick out about 1/8 inch too far for the timing cover to mate with the block. The fuel pump eccentric is from Ford Racing Parts and is part M-6287-302B if I remember right. I have another eccentric which looks shallower and would probably fit under the timng cover, but it has 7/16" cam bolt hole rather than the 3/8" hole I need for my cam.
Soooooo, what do I do?
1) find a shallower fuel pump eccentric?
2) grind the forward face my existing fuel pump eccentric down so it fits under the timing cover?
3) find a deeper timing cover?
Number 2 makes the most sense to me, but like I said this is my first SBF build.
my first 351w had that problem as well as I used the wrong cam thrust plate, what a mess as mine went together, Do yourself a favor and take off the eccentric and install an electric fuel pump, if yo want the stock look just install the mech pump and leave it there for looks less the eccentric.
Same here, check your cam retianing/thrust plate.
I had a similar issue and it was because i hadn't grinded of the metal around the thrust plate so that it cleared the thicker cam gear.
Easy to check. tighten the cam bolt and see if you can still turn the cam.
I too had the same issue using a 1-piece eccentric with a late timing set. Comparing the late cam sprocket with an early one I found the late sprocket to be .100" thicker so I milled .100" of the face of the sprocket.
Your problem lies with the fact that you have a mismatch of Timing gear set,and the 1 piece fuel pump cup. Your Cam gear was for the 2 piece cup!,Unless you have a really hot motor (550+HP)The 2 piece cup is just fine. About 10 dollars at your local parts store. Gregg M.
I will check my cam retaining plate to see which style it is. I don't think it is hitting the timing gear anywhere, but I'll double check.
Today, I took my one piece fuel pump eccentric to work work and ground about 3/16" off of the front face of it. It now fits under the timing cover with maybe 1/16" clearance. I think I'm good to go now, but I'm still curious as to how this situation comes about. I think I may have a late model timing gear which combined with my early style one piece cam eccentric is just too thick to fit under the timing cover.
It's interesting to note that I also have another one piece eccentric, except it is for 7/16" bolt FRRP cams as opposed to my 3/8" bolt cam. The eccentric for the 7/16" bolt is not as thick and looks like it would fit under the timing cover okay.