06-07-2018, 10:49 AM | #1 |
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Cam Break In
I am about to fire up a fresh engine & has a new Comp Cams 268H in it. I was reading the instructions & they tell me to REMOVE the inner valve springs I installed from the kit to break the cam in & then re-install them after break in. Holy Swaparama Batman!
Do any Yall do this with a new cam? I have the cam lubed up & additive in the oil & engine is pre lubed. Thanks |
06-07-2018, 11:51 AM | #2 |
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Re: Cam Break In
Comp Cams is a great company to work with, unparalleled customer support. The one thing I have learned on this site from a select few is something Comp will not inform you of.
Their lifters are great, yet one detail is left out. Take apart the lifters prior to install and clean them in a solvent. The protective oil they put on them will attract dirt. Its just an extra step to insure they all function properly. Coat them with the proper break in oil such as their product or something formulated for Flat Tappet lifters such as Valvoline VR1. It has the proper ZDDP compounds plus, most importantly, a high film strength. Assemble as usual and you should have no problems. The step above is just to make sure non of the lifters have any sticky spots or debris to clog up your engine. And YES follow all of their other recommendations! I most likely will be using their products again to put together another build here in the very near future. |
06-07-2018, 12:24 PM | #3 | |
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Re: Cam Break In
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06-07-2018, 03:35 PM | #4 | |
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Re: Cam Break In
Quote:
Another machinist friend said that he had a special set of rockers for break-in only with like a 1.3 ratio or something like that.
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(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 Last edited by mattfranklin; 06-07-2018 at 03:40 PM. Reason: forgot something |
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06-07-2018, 03:43 PM | #5 | ||
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Re: Cam Break In
Having the higher spring pressure of a dual spring could cause premature cam and/or lifter failure. Even after break in... so yes... remove the inner springs.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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06-07-2018, 10:46 PM | #6 |
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Re: Cam Break In
Its work, some times it takes time and effort to end up with something that works properly by abiding by the experts/design recommendations on "breaking in" a camshaft....if you do not follow the instructions/recommendations and you have issues, most likely they will not stand behind your mistake....
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06-08-2018, 12:07 AM | #7 |
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Re: Cam Break In
Thanks. Keep yall posted.
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06-08-2018, 12:15 AM | #8 |
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Re: Cam Break In
With the 268H cam you should not be running dual valve springs, so removing the inner springs would not be necessary. You should be running the 981 springs. But you can always call comp's tech line to verify.
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06-09-2018, 07:48 PM | #9 | |
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Re: Cam Break In
Quote:
Sorry I think I am gonna build me a set of adapters & run this engine on my test stand for break in & then install the inner springs before we install the engine in the car. It goes in a '69 Mustang Fastback. Thanks |
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06-09-2018, 11:56 PM | #10 | |
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Re: Cam Break In
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(Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340 |
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06-10-2018, 12:21 AM | #11 | |
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Re: Cam Break In
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06-10-2018, 10:22 AM | #12 | |
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Re: Cam Break In
Quote:
However, since it's for a 69 Mustang he's forgiven. My brother had one and it was one hell of a vehicle. Ran like a scalded ape..
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06-10-2018, 06:26 PM | #13 |
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Re: Cam Break In
[QUOTE=andyh1956;8276741]So you DID remove your inner valve springs & re install them after cam break in?[/QUOTE
No I did not, I wish I would have though, would have cleaned the lifters also, had I known at the time. My top end rebuild is still running although I am in need of doing the bottom end now, so looking at a complete rebuild or crate motor. |
06-11-2018, 10:57 AM | #14 |
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Re: Cam Break In
Thanks
We installed a Comp Cams Camshaft for a TPI in our TBI K5 engine yrs ago & didn't do anything different than crank it up & start driving it & it still runs fine. But as expensive as things are now I want to take every precaution available! |
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