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Replacement engine oil pump

Booba5185

Booba5185

New member
Hey everyone, so I owned my GTP for a total of 3 weeks before it spun a bearing. I'm replacing it with a JY engine, either 120,000 miles or 150,000 miles, still undecided on it. Before I drop it in, I'll be replacing the rear main seal\block gasket, LIM gaskets, valve cover gaskets, timing chain, timing chain tensioner, timing cover gaskets (duh), water pump, oil pan gasket, and the super charger coupler\oil. My question revolves around the oil pump. The only thing I can find at oreillys is a repair kit, which appears to come with a spring and a few gears. Should I bother with the oil pump? If I should "repair" is, what all is involved? Is there anything else I should do to this engine before I drop it in? I'll be pulling lifters\push rods\rockers to clean them all up as well.
 


The few gears is the oil pump. It's a gyro type that is driven by the crank. Which is why these motors don't typically have an oil pump failure.
 
The spring/piece are the pressure relief. By changing them you bring pressure up a bit.

If you really want a good read. Find a post on 3800Pro about oiling deficiencies. It was by James..but that's not his SN on the forum. He cut blocks and heads etc into pieces to see where issues exist.
 


This a really good read, but I'm not going to be tearing this block down that far. It did get me reading on the balance shaft delete, I'm not sure if it's worth it or not, this will be a relatively stock engine. What do you think Bill?
 
Done and Done then, cam and bottom end are staying in the replacement block. Depending on where I get the block, if I keep my old one I might tear it down and have some fun with it...
 
What about just removing the gear that makes the balancer shaft rotate? I'll be replacing the timing chain, so it's literally right there.
 


Look at it this way, the balancer is there to balance things out. Only take it out of the equation if you like vibration, want space for the double roller or have had the lower end balanced.
 
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