[Chrysler300] Technical Engine Question - Re: Heads

[Ryan Hill <ryan_hillc300@xxxxxxxxxxx>]

Some of you may remember trying to troubleshoot the poorly running (completely rebuilt) 383 in my '65 300 sport over the past several years. Unfortunately I haven't had the time required to undertake removing the engine again and starting from scratch, which is what I'm about to do over this winter......I hope.

 

My question at this point is simple. Is there a possibility that interchanging the heads from one side to the other could cause the intake manifold to sit in a slightly different position? 

 

When I tore the engine down, I used the carbon outline on the head and intake machined surfaces, around the runners, to establish where the valley pan gasket had been seated. I re-positioned the gasket and sprayed it with yellow paint, leaving a perfect outline of where the gasket port opening on both the heads and the intake. I proceeded to die-grind all of the ports in an effort to improve efficiency and flow. 

 

When I reassembled the engine, the new valley pan gasket fit perfectly over the intake ports of the manifold and the head when placed on the mating surfaces seperately. However, I have no way to tell for sure whether the ports are now perfectly aligned. (other than plasti-gauge or plastercine perhaps) The tollerances are very close now that I've narrowed the runner walls, the gasket is only about 3/16 of an inch wide between runners as I recall, and so are the manifold and heads now. 

 

The engine runs, but runs rich. It has vacuum, but not as much as it should. I have researched, tested, replaced parts, tripple checked everything, and run down every suggestion everyone has offered me. If the runners on the heads are not perfectly alligned with the runners on the intake manifold, I suspect I could have a leak. Hope my description is clear and makes sense. Does anyone know how accurate these castings are? Are the dowels aligning the head always exactly the same? 

 

Special thanks to anyone who has even read this far :) 


Ryan Hill 


 		 	   		  
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