Thank You. This big block is getting a lot of people. I'll be glad to be done with this GMC, it has been fighting me on everything the whole way. Since April. 7 months.
Yeah when breaking in the camshaft , you want to run it about 2000 to 2500 RPMs , only run it steady for quite sometime, like 5 to 10 minutes at 2000 at first, then you can run it at about 2500 for about 5 minutes, then drop it back down to about 2000 for another 5 to ten minutes, but I wouldn't run it over 2500 RPMs, and total run time is supposed to be about 20 to 30 minutes, while constantly checking your oil pressure and temperature gauges. Follow your cam manufacturer instructions for break in, if it didn't come with instructions look online at the manufacturer's website to be sure.
You can rev the engine ffs! I've got a cam card here for a flat tappet that tells you to alternate the throttle from 1800 rpms to 3500 rpms from time to time, specifically to help splash the oil upon the camshaft!! Some people are so anal-retentive, they have to take laxatives daily in order to shit! The main thing is don't let the engine fall to an idle for any length of time, because the oil doesn't get splashed upon the camshaft, it's the whole reason you need to maintain 1800 rpms and higher. You're doing great, sometimes these new cams and lifters today are just pure Chinese crap, no fault of the engine builder! In the 70's and 80's I used to change camshafts in my driveway, engine still in car, over the course of a couple of hours. No break-in oil, no camshaft lobe lube, just put fresh oil in and drive the damned thing, never a problem. After the 2000's, cam's and lifters started failing all the time. It's directly related to companies sending their stuff over seas to China and getting it manufactured over there for pennies on the dollar, and it has nearly ruined the industry! Great videos, thanks for sharing, you're doing great!!
Brother, if its gonna die there is nothing you can do. Reving it or not. Doesn't matter. There are all these. You have ro do this, this and this to make it live. And they still die. I used rk put a flat tappet cam in and the next morning crank it up and drive to work. Not anymore. Oils have changed. Parts have changed.
Ok, I have heard it is a 50/50 chance. There are those that comment, they have done thousands and never had any fail. IDK, it is done and I am going on and try a roller cam.
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Nice work lots of good info your sharing, keep the videos coming
Love the videos!!! Following your build!!
Thank You. This big block is getting a lot of people. I'll be glad to be done with this GMC, it has been fighting me on everything the whole way. Since April. 7 months.
Yeah when breaking in the camshaft , you want to run it about 2000 to 2500 RPMs , only run it steady for quite sometime, like 5 to 10 minutes at 2000 at first, then you can run it at about 2500 for about 5 minutes, then drop it back down to about 2000 for another 5 to ten minutes, but I wouldn't run it over 2500 RPMs, and total run time is supposed to be about 20 to 30 minutes, while constantly checking your oil pressure and temperature gauges.
Follow your cam manufacturer instructions for break in, if it didn't come with instructions look online at the manufacturer's website to be sure.
You can rev the engine ffs! I've got a cam card here for a flat tappet that tells you to alternate the throttle from 1800 rpms to 3500 rpms from time to time, specifically to help splash the oil upon the camshaft!! Some people are so anal-retentive, they have to take laxatives daily in order to shit! The main thing is don't let the engine fall to an idle for any length of time, because the oil doesn't get splashed upon the camshaft, it's the whole reason you need to maintain 1800 rpms and higher.
You're doing great, sometimes these new cams and lifters today are just pure Chinese crap, no fault of the engine builder! In the 70's and 80's I used to change camshafts in my driveway, engine still in car, over the course of a couple of hours. No break-in oil, no camshaft lobe lube, just put fresh oil in and drive the damned thing, never a problem. After the 2000's, cam's and lifters started failing all the time. It's directly related to companies sending their stuff over seas to China and getting it manufactured over there for pennies on the dollar, and it has nearly ruined the industry!
Great videos, thanks for sharing, you're doing great!!
Brother, if its gonna die there is nothing you can do. Reving it or not. Doesn't matter. There are all these. You have ro do this, this and this to make it live. And they still die. I used rk put a flat tappet cam in and the next morning crank it up and drive to work. Not anymore. Oils have changed. Parts have changed.
Ok, I have heard it is a 50/50 chance. There are those that comment, they have done thousands and never had any fail. IDK, it is done and I am going on and try a roller cam.
@DACoutBack I've never had a roller fail!!!
@@GrandPitoVic some people say, they have. I do feel a lot more comfortable doing the roller thing.
@ 0:32....bullshit, yes indeed the rpms should vary. Splash oiling on the camshaft is better @ 2.5k rpm than qt idle
THIS!!
That one set of locks was 11/32....I thought the stock valve dia.is 3/8...check and make sure...
Stock valve stem size is .371"
@@DACoutBack Yep, .371 = 3/8", .343 = 11/32".