Author Topic: Big block pushrod oiling  (Read 1415 times)

Offline sstocker31

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Big block pushrod oiling
« on: November 12, 2010 - 07:48:38 PM »
 :clueless:......OK I'm doing this engine (440 RB) and had to step away from it for 9 months.....the wife needed her "projects" done. Thank God that BS is over with.
Now since I'm a Chevy guy, and am not too familiar with these engines, I have a couple of Questions regarding the valvetrain.
The  hydraulic lifters have no provision for pumping oil up the pushrod for oiling. The pushrods are solid ends....so no oil going through there either ....so my question is How does the pushrod/rocker arm socket get its supply of oil??
Now I know that the rocker arm shafts have a timed oil supply, and the shafts fill with oil, and lube the rockers,but I can't see how the rocker arm/pushrod joint gets oiled....Whats the secret??
What rockers do you recommend for a mild build up. Its going to have 9.5:1 compression, 906 heads with a pocket port, Comp magnum 280H cam (230@050" with .480" lift). Will the stockers be OK of would you recommend something else. I have to replace the rockers and shafts anyhow because of wear, so spending a few extra bucks is expected.
Any help is appreciated.






Offline Chryco Psycho

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Re: Big block pushrod oiling
« Reply #1 on: November 13, 2010 - 06:56:11 AM »
they oil from the supply inside the shaft
I would use a steel rocker like the Comp or PRW , the ratio accuracy is much better than stock

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Offline sstocker31

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Re: Big block pushrod oiling
« Reply #2 on: November 15, 2010 - 10:11:50 PM »
Thanks for the reply Cryco....Now how does the oil get in that little hole in the rocker when its uphill so to speak from the oil supply. It's just splash oiling....and not much of it i guess. Do these engines have troubles burning up rockers??? :dunno:
Now I was looking around the net and found these,

http://www.kmjent.com/cart/product.php?productid=205&cat=11233617&bestseller=Y
 any comments. It looks like the comp set is going to be about $7-800 by the time it gets on my doorstep, those in the link may be more reasonable, if they are worthy.

Offline sstocker31

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Re: Big block pushrod oiling
« Reply #3 on: November 16, 2010 - 12:47:20 PM »
Thanks for the reply StRoKer.....but my hyd. lifters and pushrods don't have provisions for pushrod oiling....no holes anywhere for oil to flow (Except into the side of the lifter).
It looks to me that they should have provisions for pushrod oiling....but it doesn't.
Do we have choices which way to provide oiling??? :1zhelp:

Offline Chryco Psycho

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Re: Big block pushrod oiling
« Reply #4 on: November 16, 2010 - 03:28:37 PM »
Mopar pushrods do not have holes in them
yeah just a trickle of splash oiling

Challenger - You`ll wish You Hadn`t