hyd. roller lifters on a cast iron hyd roller camshaft??

[RobinLBuddi]

This cam had a thrust bolt/button and bronze spacer in place from the very start. It didn't stop the cam from moving back, the pull from those angled lobes is what really was a contributing factor, probably got the grind on those lobes going, I would imagine.

Thanks!!
Robin

 

[87 turbo buggy]

Hello! I'm actually from the RealOldsPower forum, and recently had a problem with a Mondello/Engle hyd roller camshaft failure and was told to check out this site as there was a big problem for you GN, GNX, and TR guys just a while back.
I went exactly by the book with this motor, and spring pressures were exactly as recommended. 140 lbs max @ seated, and 340 lbs max @ open. Only 7K miles on this master rebuild with many mods, when I find that every single lobe had about a 1/16 inch groove wiped out of it (same width of lifter bearing) There was also a bronze cam spacer and thrust bolt button used on this, but cam still was not centered correctly, almost looks like it is centered for flat tappet lifters. I don't know if this forum supports posting pictures but I'll give it a shot. If not, there will be a link here instead. Check it out!!

Some have said that it looks like Mondello had sent me a cast iron core flat tappet cam which was supposed to be a 8620 billet steel hyd roller camshaft, that is what I'd paid for. Mondello is notorious for ripping people off, but I didn't learn this until after the purchase was made. "If I only had known then, what I know now". The way I am being told by many people is that, hydraulic roller lifters are not compatible with cast iron core camshafts, it will work for those with low spring pressures, but where is the line drawn at? Any and all input regarding this subject would be very much appreciated.

Thanks a million!!!
Robin L. Buddi

i do not know where you got your info hydraulic roller lifters have been used on mosk cars from 87 on. one other thing was the block to be machined or was the can gear to be machined on the rear to center it. it sounds like no. was the front cam spring preload checked. I hear all this junk that is made, but no one seens to take responceabilty to check fit up. has the craft died that all moters require blueprinting on the builders part. the cam failed because it was installed improperly

matt

 

[Blazer406]

Attn: 5 year old thread!!!!!!!!

 

[mygn276]

Well for years i heard nothing but bad things about this Mendello guy. It sounds like he is making a fast buck by selling the wrong cam for the application.A cast iron flat tappet cam is alot cheaper than a roller so go figure. Everyone remember the econo roller fiasco? No one took responsibility for that mess. I know of several that got taken by precision turbo and lost thousands of dollars. There excuse was that the cam was not broken in right or used with the wrong springs bla bla bla. Then the message board crashed and everything about the econo roller deal was lost.So all i have to say is write everything down that has happen, and be organized, get a lawyer and good luck.

 

[mygn276]

O.... nevermind :redface:

 

[Blazer406]

O.... nevermind :redface:

LOL