Re: [FWDLK] Rocker Shaft Installation in 1957 Dodge 325 Engine
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Re: [FWDLK] Rocker Shaft Installation in 1957 Dodge 325 Engine



Gary –

 

Thanks for the reply, and we’ve definitely checked off the items you mentioned in prior troubleshooting.  Nice to know that I’ve got it right so far!

 

What I’m looking for is more specific detail in the orientation of the little arrow that’s at one end of each rocker shaft.  Should it point to the front or the back?  Is there a difference between Left or Right?

 

Thanks for your help!

 

John

 

From: Gary Pavlovich [mailto:glpavlovich@xxxxxxx]
Sent: Wednesday, November 18, 2015 6:44 PM
To: John Williams; L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: Re: [FWDLK] Rocker Shaft Installation in 1957 Dodge 325 Engine

 

John,

 

I am sorry to hear of your engine/pushrods issues.  There are a few items to look at and check.  We will assume that the rocker shafts were properly cleaned with end caps removed and the shafts rodded and solvent rinsed till all residue was removed.

Firstly, for proper oiling to the rockers & pushrods the banana grooves in your rockers need to be facing “down.” 

Have you done a visual with a valve cover off to see if oil is emanating from the shaft/rockers?

 

After checking for evidence of proper rocker shaft orientation and “oil” distribution, determine that the pushrods supplied in your rebuild are installed correctly with the smaller 1/4” ball in the cup of the rocker arm – the larger 5/16” ball goes into the hyd. lifter.

 

Subsequent items to check;

See if you can find the engine rebuild invoice for part numbers of your lifters, pushrods, and if your cam was reground.  Without “adjustable” rocker assemblies you may have binding and pushrod breakage because of several factors;

incorrect pushrod ball orientation,

incorrect pushrod length (wrong pushrod or improper length of pushrod to account for head milling/smaller lobe from reground cam/block decking & head gasket thickness), or incorrect hyd. lifters – application should be Sealed Power HT812 (some older numbers are HT1812).

 

A lack of sufficient oil will “blue” the metal/gall or incorrect pushrod/lifters will heat and expand enough bind after warm-up/extended driving and cause breakage over time.

 

Keep us posted on what you find.

Gary Pavlovich

 

Sent: Wednesday, November 18, 2015 2:09 PM

Subject: [FWDLK] Rocker Shaft Installation in 1957 Dodge 325 Engine

 

Three years ago I had the 325 V8 engine of my 1957 Dodge Custom Royal rebuilt.  Since then, I have regularly been going through pushrods at the rate of one every one to two months during the driving season.  It’s a problem I’ve never experienced before the rebuild.  I’m sure this is caused by improper oil distribution to the rocker arms, but I’ve been unable to confirm it. 

 

I need a foolproof way to ensure proper rocker shaft installation so the oil gets to where it needs to be.  Can anyone confirm the correct orientation of the little arrow on each rocker shaft to ensure proper installation?  Any pictures of this that would be helpful?

 

Thanks for your help!

 

John Williams

 

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