Lost one on the break in today... - Page 7 - Chevelle Tech
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post #91 of 110 (permalink) Old Jan 26th, 16, 6:56 PM
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Jeff
 
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Re: Lost one on the break in today...

Shouldn't the lifter have wear marks on the outer portion of the face? Isn't that what makes it spin? (lifter convex / cam tapered) It looks like the lifter was spinning, but the wear is in the center.
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post #92 of 110 (permalink) Old Jan 26th, 16, 7:16 PM
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Unhappy Re: Lost one on the break in today...

That lifter face indicates to soft metal. It should not be cupped that bad in 15 minutes if the metal was anywhere near spec hardness ... It's not the cams fault - it's another bad lifter ...

And as to oil - 1.) 540 RAT will prolly not be back by to answer your question..., and 2.) I was not suggesting any specific oil. I was saying that if you buy a cam and lifters from say Howard's, they will have specific recommendations that you will follow if you want the 5-year warranty to be honored on their end.

It's not negotiable on a warranty claim if there ever is one (which I doubt there will be ...).
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post #93 of 110 (permalink) Old Jan 26th, 16, 7:52 PM
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Re: Lost one on the break in today...

When a flat tappet fails it is typically during the break in so 15 minutes isn't unreasonable.

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post #94 of 110 (permalink) Old Jan 26th, 16, 8:01 PM
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Gene
 
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Re: Lost one on the break in today...

HOLY COW! Was I looking at a "cupped" lifter? If I was, that a lot of shiny HARD metal racing through the engine, And bearings down to copper backing OUCH!

No pro here, but for a lifter to go from crowned to concave is alot of shaving. And it isnt aluminum. Hence all the collateral damage. Not the oil's fault.

You know what the friggin bitch of it is, pulling all the oil galley plugs and cleaning that whole mess super super super well. We used long gun brushes , one piece kind.

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post #95 of 110 (permalink) Old Jan 26th, 16, 8:58 PM
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Re: Lost one on the break in today...

Luckily I've been using the Valvoline VR-1 racing oil for a long time now. It's probably the best rated conventional oil there is according to 540 Rat's charts. Suggest you guys read over the chart he posted. It's good reading with factual information.

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post #96 of 110 (permalink) Old Jan 26th, 16, 9:42 PM
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Re: Lost one on the break in today...

That damage to me looks like there was no oil flow to the mains.
Lifter and cam are lubed by splash from the rods.
Ditto for piston skirts.

In spite of what the gauge said........

Bummer Alan!

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post #97 of 110 (permalink) Old Jan 26th, 16, 10:22 PM
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Re: Lost one on the break in today...

Quote:
Originally Posted by 65chevelle300post View Post
Luckily I've been using the Valvoline VR-1 racing oil for a long time now. It's probably the best rated conventional oil there is according to 540 Rat's charts. Suggest you guys read over the chart he posted. It's good reading with factual information.
I helped a friend rebuild his 467 BBC 27 years ago and he recently gave me the truck. It has a CC 268H flat tappet cam. I recall spring pressure was over 330 lbs on the nose. Motor has over 80k miles on a steady diet of Valvoline 20W/50 non-synthetic racing oil. I recently had the intake off and the cam looks great. It's $6/Qt but well worth it for a quality oil that doesn't require any additives.
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post #98 of 110 (permalink) Old Jan 26th, 16, 10:48 PM
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Re: Lost one on the break in today...

Quote:
Originally Posted by Monte442 View Post
Did you remove the pressure relief valve in the pump cover when you welded the pick up on ?
Helped a guy year ago who gas welded his pick up on. a Mellon HV SBC pump... the heat stiffened the oil pressure spring resulting in idel pressure @ 80 lb and bury the 100 lb S&W meter at anything above 2000 rpm... changed spring from old pump = A - OK

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post #99 of 110 (permalink) Old Jan 26th, 16, 11:04 PM
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Re: Lost one on the break in today...

Not want to morph the thread... lost a cam and lifters on a fresh engine
Lunatie Voodoo cam and lifter kit ....
in the long run IMHO the # 3 intake and # 5 exhaust lifters collapsed.
disassembled the mother last week ... these two lifer were mushroomed and the lobes wiped .070 in the #3 intake and .045 on the #5 the 14 lifters all had nice 3/8 swirl marks but the two bad lifters were turning but wore down 1/8" plus.
I have no access to a Brunel Hardness tester but a spark test and fine file tests reveals Not bright spark like other of the 14 good one's but a dull Orange... and the File test on the good lifters hard hi pitched sound and no visible file down/cut on the edge Where the two bad lifters there was on each pass was low sound and visible cut hatch !


OH well first cam failure in my 50 plus years of building engines
only other failure was a 265 that I stuffed a latter SBC cam in and it id not had the cam flat spot !!! = blue bearings

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post #100 of 110 (permalink) Old Feb 10th, 16, 11:53 AM
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Re: Lost one on the break in today...

Ever find out the cause of all the carnage?

Jim

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post #101 of 110 (permalink) Old Mar 18th, 16, 2:55 AM
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Re: Lost one on the break in today...

Quote:
Originally Posted by Roadknee View Post
I helped a friend rebuild his 467 BBC 27 years ago and he recently gave me the truck. It has a CC 268H flat tappet cam. I recall spring pressure was over 330 lbs on the nose. .
====================

" Motor has over 80k miles on a steady diet of Valvoline 20W/50 non-synthetic racing oil. I recently had the intake off and the cam looks great. It's $6/Qt but well worth it for a quality oil that doesn't require any additives. "

FYI,thats because you did the right thing using oil the was designed & formulated specifically for Ft cam use that has a quality base stock oil along with a quality additive containing approx 1,400ppm of anti wear agent / zddp (Zinc & Phos) thats just right for ft cam protection & nice long normal srvc life just like you got.

Scott ,read this announcement - https://www.chevelles.com/forums/58-r...uncements.html

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Last edited by Mike; Mar 18th, 16 at 2:58 PM.
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post #102 of 110 (permalink) Old Mar 18th, 16, 3:21 AM
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Re: Lost one on the break in today...

Quote:
Originally Posted by VORTECPRO View Post
I'm all about using your data, please just tell me what oil to use with my 360 inch flattappet engine, thanks.
=================

Mark,you have a pm!

Scott

SCOTT
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post #103 of 110 (permalink) Old Mar 18th, 16, 7:49 PM
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Re: Lost one on the break in today...

Back in 1982 I had purchased a 1971 Chevelle with a nicely Built 355 from a friend of mine. They engine was built buy a local reputable shop, seemed to run good, car had a muncie and 12 bolt 3:73 rear. The Engine had a Crane Fireball FT Hyd cam, a low profile single plane intake and a 600 Holley DP.

Not long after I had purchased the car, I discovered it had ate a lobe/lifter - been that way since break in I guessed. Not knowing any better, I flushed the engine in the car with oil, swapped in a Comp 292H FT and a Weiand intake.... broke in the new cam and changed oil again, and tuned it up and ran it.

It had another 5,000+ miles on it when I sold it, still holding 40+ #'s oil pressure showing no signs of any issue. Regularly running it to 6000+ Rpms.... I had sold the car due to a spiral crack in the frame over the right Rear wheel. I had never seen anything like that, wasn't sure if that was due to my penchant to drop the clutch at about 6,000 RPMS from about every stop light and redlight I cam across. I went through 2 sets of L60's in that 5,000 miles...

I know better today and certainly would tackle it differently today, if I found a trashed lobe and lifter, but back then I was 18 and didn't have a lot of money. It is more prevalent of an issue today, but it happened back then as well.
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post #104 of 110 (permalink) Old Mar 18th, 16, 8:37 PM
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Re: Lost one on the break in today...

Lifter and cam are lubed by splash from the rods.
Ditto for piston skirts.



Bummer Alan!

Ron[/QUOTE]

Wrong!!
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post #105 of 110 (permalink) Old Mar 19th, 16, 12:05 AM
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Why is everyone so quick to trash Comp? I love their stuff and have never had an issue in 20+ years.
This doesn't have the symptoms of a cam failure. It sounds more like bearing failure possibily due to debris in the oiling system taking out one or more bearings. Been there.... Good luck.
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