Do cams ever go bad?
#21
TECH Resident
Join Date: Dec 2004
Location: K-W, Ontario
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
Did you forget to put oil in the motor?
Looks like the surface layer has been taken off.
Roller cams rarely fail. I have seen some of the hardened layer wear down
on a couple rollers in my time.
Looks like the surface layer has been taken off.
Roller cams rarely fail. I have seen some of the hardened layer wear down
on a couple rollers in my time.
#24
Launching!
iTrader: (1)
Join Date: Mar 2004
Location: Pennsville, NJ
Posts: 200
Likes: 0
Received 0 Likes
on
0 Posts
What happened? I don't know. There definitely was oil in the car and I think it happened over a long period of time. I had this cam in for 60K miles! Possibly the camshaft wasn't heat treated correctly. The lifters looked good, plus this wear only occurred on the first 8 lobes of the cam, the back 8 were perfect.
Obviously, you can see why I thought this was my only problem, that's why I did the H/C swap. However, after doing the swap, the same engine noise was happening, hence, the new shortblock.
Obviously, you can see why I thought this was my only problem, that's why I did the H/C swap. However, after doing the swap, the same engine noise was happening, hence, the new shortblock.
#30
Launching!
iTrader: (1)
Join Date: Mar 2004
Location: Pennsville, NJ
Posts: 200
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 777
Sound to me like the tolerances weren't set up right...
#31
11 Second Club
iTrader: (8)
Join Date: Aug 2004
Location: Montgomery, IL
Posts: 1,831
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Byter
This is why I had to get all the mods in my sig...
#32
TECH Resident
I have seen LS-1 type engines with failed camshafts, it doesn't happen very often but the most common failure is when a piece of the cam lobe either fractures or the hardfacing flakes off. From that point it starts to damage the lifter roller and if not fixed soon it will sometimes cause enough clearance gain to toss a pushrod and start braking other pieces. In our dealership I have seen two in the past couple of years (that is a low percentage of the 1000 warranty repairs per month we perform).I have never seen a cam bearing fail on one of these yet.
#33
TECH Resident
...like that!! "Byter" had what I would call a typical hardface failure. I have no clue what causes this but I doubt it was anything other than a crappy hardening job.
#36
Launching!
Join Date: Nov 2004
Location: Flower Mound, TX
Posts: 289
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Byter
At least that is what I told the wife!
Honey, my cam is worn out so I need to go out and get some Z06 calipers and Bilstein shocks along with a $4000 shortblock...
DAMN, the next girl I get I am NOT teaching as much about cars.
#37
Launching!
iTrader: (1)
Join Date: Mar 2004
Location: Pennsville, NJ
Posts: 200
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BottleRocket
Honey, my cam is worn out so I need to go out and get some Z06 calipers and Bilstein shocks along with a $4000 shortblock...
DAMN, the next girl I get I am NOT teaching as much about cars.
DAMN, the next girl I get I am NOT teaching as much about cars.