Stop in for a cup of coffee

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Random pic.
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MomsDuster said:
Not as of yet. About the only thing I can do (as far as I know) without pulling the engine, tearing it down and sending it out to have the lifter bores checked is to go ahead and replace the cam and lifters. Then put some miles on it and recheck it. Probably do that in a few weeks. Got a lot on the calendar this month. I did put a fresh set of lifters in it. May put a few miles on it before I do the cam. There was only one lifter not spinning. Should be able to tell if it’s still not spinning. Not holding my breath!
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Wish I had some experience with such things but I don't. Is there way to check for spin with running it?
halifaxhops said:
Truck is still kicking my ***, ran new wirers and now the fuel pump took a crap! Really pissing me off.
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That sucks.
 
just checked the forcast - big difference between the NWS and wunderground temperature trends one day out (Fri - Sun). Be interesting to see which one is closer.
 
MomsDuster said:
Probably could pull the valve cover and check it while running. Probably make a heck of a mess too!
:lol:
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I am not sure you will be able to see the lifter itself much less if it is spinning in the bore. Almost would need to remove the intake to actually see it or maybe with a really good bore scope. I believe the grind profile on the cam is what makes it spin. Let me check on this and will get back.
 
71GSSDemon said:
I am not sure you will be able to see the lifter itself much less if it is spinning in the bore. Almost would need to remove the intake to actually see it or maybe with a really good bore scope. I believe the grind profile on the cam is what makes it spin. Let me check on this and will get back.
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I’ve read that the cam machining is what creates rotation, and I’ve read that it’s the lifter machining. And then I’ve read where it’s a combination of both! All over the map. When I had it apart last week it looked as if I could pull the lifters without removing the manifold, putting it back may be a PITA!
:lol:
Now being able to see it with the rockers and shaft installed......valid point.
 
The cam lobes are not perpendicular with the center-line, they are ground at a slight angle. That and the slight convex shape of the lifter base causes them to rotate in their bores.
 
OK. It is typically the grind on the cam lobe or an offset in the alignment of the lifter bore that causes the spin. Sometimes both. If the lifter isn't spinning, I would check the cam lobe as close as possible. I assume you have the intake off to be able to have removed the lifter. You should be able to mark the new lifter and crank the engine over to see if it is spinning. If it is back together already, then you should be able to mark the pushrod and see if it is spinning. Some cell phones actually have a slow motion video feature. We were able to hand turn a cam in an engine and play back the slow motion video and see the cam bucket turning. In the end, I would be concerned with the cam. Is this the same cylinder where the rocker arm broke a while back?
 
toolmanmike said:
The cam lobes are not perpendicular with the center-line, they are ground at a slight angle. That and the slight convex shape of the lifter base causes them to rotate in their bores.
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Well let me weigh in and tell you what I know...it's broke. Hope that helps.
As usual you guys have me shaking my head....all good!!
 
Funny I've know my wrench buddy who works on my old cars for 30+ years. He knows my knowledge, or lack of.
I read things here and then go in and raise a conversation and he shakes his head.
He's great though. I'm about the only person who gets to go out into the shop when he's working on my car.
I stay out of the way and help when asked. Learned a lot.
 
Well here is the plan, when I have the $$ in hand to replace the cam and lifters. I’ll tear it down and do it. I’ll be sure to post pics of the cam. Until then i’ll Get the garage squared away and the Duster will sit.
 
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