ummmm, is this really bad?
05-04-2009, 10:03 AM
#1
in limbo
Thread Starter
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
ummmm, is this really bad?
lets just sayyyyyy....shit....
lol!!(im laughing cause its not my block for my build, its for a 77 t-bird 351w)
no but seriously, what happens when you go and measure the endplay on the cam shaft and its around .011-.018? i know its too much but can you fix this in any way? what causes this excessive amount of endplay? is the block junk? is it too far out of spec to run or is it still close enough to run it and have no issues?
side notes
-i did verify it was the correct cam shaft by the stamp on the end of it, so it is right
-thrust plate is tq's to spec
-timing set is new and secured to the camshaft
so from what i can tell i did everthing correctly.
lol!!(im laughing cause its not my block for my build, its for a 77 t-bird 351w)
no but seriously, what happens when you go and measure the endplay on the cam shaft and its around .011-.018? i know its too much but can you fix this in any way? what causes this excessive amount of endplay? is the block junk? is it too far out of spec to run or is it still close enough to run it and have no issues?
side notes
-i did verify it was the correct cam shaft by the stamp on the end of it, so it is right
-thrust plate is tq's to spec
-timing set is new and secured to the camshaft
so from what i can tell i did everthing correctly.
05-04-2009, 11:04 AM
#2
Banned
Join Date: Dec 2005
Location: Lil' Rhody
Posts: 22,376
To ensure that you have the right clearances and combination of parts you must check the camshaft
end play. To check camshaft end play, the cam first must be moved completely to the front of the
engine, against the back of its retaining plate. Do so by pulling the cam gear forward gently until it
stops against the plate. Use a feeler gauge to check the clearance between the front of the camshaft
retaining plate and the back of the timing gear. The proper clearance should be between .004” and
.008”. End play can also be checked with a dial indicator on the front of the cam gear while the cam is
moved backwards and forwards completely in the engine.
end play. To check camshaft end play, the cam first must be moved completely to the front of the
engine, against the back of its retaining plate. Do so by pulling the cam gear forward gently until it
stops against the plate. Use a feeler gauge to check the clearance between the front of the camshaft
retaining plate and the back of the timing gear. The proper clearance should be between .004” and
.008”. End play can also be checked with a dial indicator on the front of the cam gear while the cam is
moved backwards and forwards completely in the engine.
05-04-2009, 03:35 PM
#6
in limbo
Thread Starter
Join Date: Jan 2007
Location: Iowa
Posts: 7,300
ok so i checked the thrustplate, there is a wear pattern of .002-.004. it would just barely barely drop it into spec....if i replace the thrustplate you think it would be ok?
timing assembly is new and the correct one so thats wouldnt be the issue.
timing assembly is new and the correct one so thats wouldnt be the issue.
05-04-2009, 10:36 PM
#10
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
The cam should never contact the rear plug. The thrust is determined by the cam hitting the thrust plate on one side and the cam gear hitting the thrust plate's other side. When thrust is out it's because either the cam, plate or gear are worn, or a combination of the 3.