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FRESH 400 REBUILD WITH LOW OIL FLOW TO TOP END  
65pmdgto1
User | Posts: 63 | Joined: 12/07
Posted: 08/24/08
10:50 AM

The subject says about sums it up. 65 PSI at idle and very little flow from push rods. I went back to the machanist and asked him if he put oil restrictor in this block, he says no with a puzzled look on his face. I'm wondering if he drove the front galley plugs in too far??? Hopefully not the rear I really don't to pull this thing back out now with fresh paint and all about done.  


 
OriginalHO
User | Posts: 95 | Joined: 08/08
Posted: 08/25/08
09:10 AM

What lifters, pushrods and rocker arms were used?  


 
Pontiacman8
User | Posts: 145 | Joined: 02/08
Posted: 08/25/08
10:40 AM

Was the block properly cleaned..  


professional hi-performance engine builder

 
OriginalHO
User | Posts: 95 | Joined: 08/08
Posted: 08/25/08
02:24 PM

You asked: "I'm wondering if he drove the front galley plugs in too far???"

That is unlikely as there is a recess that limits the standard gallery expansion plug depth.  However, a gorilla with a 20lb sledge...  If properly installed, the plugs will be flush with the front face of the block and possibly staked.  I always drill and tap that hole for 3/8-NPT and use the corresponding pipe plug.


Also asked: "Hopefully not the rear..."  The rear inside plugs are 3/8-NPT and it is very unlikely that they are too far in.  The more common mistake is to leave them out completely, but it does not appear you have that problem.  


 
65pmdgto1
User | Posts: 63 | Joined: 12/07
Posted: 08/25/08
08:38 PM

The block was boiled and presure washed with all of the galley plugs and freeze plugs removed. Then brushed and high presure rinsed. The whole valve train is Comp Cams cam, lifters, push rods,roller tip rockers and their true roller timing set. Rod and main bearing by King Bearing Co. 20-20  


 
OriginalHO
User | Posts: 95 | Joined: 08/08
Posted: 08/26/08
03:32 AM

All that sounds good.

You think you have inadequate upper valve train oiling because???

With roller rocker arms you don't need much oil.  Do you have zero oil with the valve covers off and the engine running?

Craig  


 
Pontiacman8
User | Posts: 145 | Joined: 02/08
Posted: 08/26/08
09:33 AM

Are the lifters hydrolic if so what were they adjusted to.  


professional hi-performance engine builder

 
65pmdgto1
User | Posts: 63 | Joined: 12/07
Posted: 08/26/08
08:03 PM

I installed the Comp Cams hydralic lifters and the Chevy style adjustable studs. Set the lifters to a quarter turn preload. After the break in run of a half hour and installation of the complete exhuast system I could hear a little noise that I suspected was a loss rocker arm so removed the valve covers one at time and reset them all while running. I excepted the usuall oil shower but found the oil from the push rods to be more of a mist than the over the fender shower. Everything is wet with oil and no signs of premature wear but concerned maybe not enough to help cool the springs. It's just not what I excepted to find and have other sets of Comp Cam roller TIP rockers and the flow is more on what I consider to be on the normal side.  


 
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