camshaft failure

[Hello]

I have been reading and have been talking with some old timers at work and they told me about camshaft wiped lobed. Being with cadillac a light bulb went off in my head and i remembered guys installing camshafts in the 4100 for wiped cams. I have mu Uncles car with #8 pushrod intake broke. valve is stiff and knotty (sticks.) Should I just plan on installing a new camshaft and lifters. ;help

 

[fine69]

I have been reading and have been talking with some old timers at work and they told me about camshaft wiped lobed. Being with cadillac a light bulb went off in my head and i remembered guys installing camshafts in the 4100 for wiped cams. I have mu Uncles car with #8 pushrod intake broke. valve is stiff and knotty (sticks.) Should I just plan on installing a new camshaft and lifters. ;help

Are you referring to a cam that was recently installed? In any case, be sure that you follow proper break-in procedures for the initial start-up with the new camshaft and to use oil with a high zinc content.

I recommend you do a quick search on this topic as there are several threads that could give you helpful info.

Ralph

 

[Hello]

no this is the factory cam 45K on motor and kinda neglected

 

[6880 Mike]

...#8 pushrod intake broke. valve is stiff and knotty (sticks.) Should I just plan on installing a new camshaft and lifters....

At the least you have to replace the broken pushrod and reset the valve lash on #8.

Might not be a bad idea to check the lash on all.

 

[Jack]

Sounds as though uncles car may ... repeat MAY ... may have a bent or galled valve. Of course, don't drive it until it's fully-repaired.

Regardless, an experienced knowledgable person should check cam lobes, lifters, pushrods, rockers, springs & valves.

If ... IF ... if it has a bent/galled valve ... simply replacing cam-lifters will hurt wallet ... and it'll be right back at square one ... or worse.

the only way to fix a bent/galled valve requires head remove-install.

next time, state year make & model ... that's lots more helpful than owner's identity.

 

[Mr. Chuck]

Had to replace my 81 cam just short of 50K, because #3 lobe flatened out; on California vechicles, gas recovery is routed back to engine at #3 cylinder. Additional heat and a too soft (not hardened enough by factory) cam cause lobe to wear down, causing #3 cylinder valve to fail to open / function properly. Engine felt like it was missing; replaced plug, ignition wire, no improvement. Took it in, mech found the bad cam, replaced same, problem fixed. Mileage now around 130k, still running good, especially after rebuliding Carb.