Brent Perry
Junior Member
Hello, hopefully this post has enough info to answer a few questions I have.
Background; the vehicle is new to me and had a severe 'tick' when purchased (single tick at engine speed, same tune at all temps and all rpm ranges). Figured I might get away with just a simple exhaust manifold bolt change as the shields on both driver and passenger sides were loose. Four of the exhaust manifold bolts were found to be cracked and all bolts were replaced (loud tick continued). Checked flex plate, not cracked and tight. Compression test and oil pressure checks good. Decided to pull the motor and dive deeper.
Cam and lifters show wear/marring, but not to the extent that I have seen on other posts, nor to the extent that I would consider to make that loud of a tick. I found the cam measured .030 max end play before removal (supposed to be .001-.003), but all bearings and surfaces check good (I don't understand the reason for such large endplay). One of the cam lobes (the worst being shown) is slightly grooved. A few of the rollers show marring, but all rotate and appear to have no unusual play. I am replacing the cam and lifters, but my main concern is that after reassembly the tick will still be present (again this is not an injector tick, this can be heard 20 yards away). What am I missing, other than hands on or visual experience?
On further inspectionCrank: I believe this tab (circled in red) on the #3 main, to be the thrust bearing. I can wiggle it up/down (head to pan) about 1/32nd of an inch, moves freely enough to make a slight tick sound. It has no fwd/aft movement. Wanted to know if I have correctly identified this part, and should it be moving/moveable?
Background; the vehicle is new to me and had a severe 'tick' when purchased (single tick at engine speed, same tune at all temps and all rpm ranges). Figured I might get away with just a simple exhaust manifold bolt change as the shields on both driver and passenger sides were loose. Four of the exhaust manifold bolts were found to be cracked and all bolts were replaced (loud tick continued). Checked flex plate, not cracked and tight. Compression test and oil pressure checks good. Decided to pull the motor and dive deeper.
Cam and lifters show wear/marring, but not to the extent that I have seen on other posts, nor to the extent that I would consider to make that loud of a tick. I found the cam measured .030 max end play before removal (supposed to be .001-.003), but all bearings and surfaces check good (I don't understand the reason for such large endplay). One of the cam lobes (the worst being shown) is slightly grooved. A few of the rollers show marring, but all rotate and appear to have no unusual play. I am replacing the cam and lifters, but my main concern is that after reassembly the tick will still be present (again this is not an injector tick, this can be heard 20 yards away). What am I missing, other than hands on or visual experience?
On further inspectionCrank: I believe this tab (circled in red) on the #3 main, to be the thrust bearing. I can wiggle it up/down (head to pan) about 1/32nd of an inch, moves freely enough to make a slight tick sound. It has no fwd/aft movement. Wanted to know if I have correctly identified this part, and should it be moving/moveable?