Replacement engine oil pump

**Booba5185** · 03-21-2013

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.

**BillBoost37** · 03-21-2013

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.

**Booba5185** · 03-21-2013

So do you think I should just leave it alone?

**GTPpower** · 03-21-2013

I would leave it alone.

**Scottydoggs** · 03-21-2013

it is worth changing the spring and shaft to the upgrade version.

**BillBoost37** · 03-21-2013

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.

**Booba5185** · 03-21-2013

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?

**BillBoost37** · 03-21-2013

Don't delete unless you have the engine down to a bare block.

**Booba5185** · 03-21-2013

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...

**Booba5185** · 03-21-2013

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.

**BillBoost37** · 03-21-2013

The only time I suggest that is when you want to use a double roller.

**Booba5185** · 03-21-2013

Okay then, thanks for clearing it up, it'll stay stock.

**BillBoost37** · 03-21-2013

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.

**Booba5185** · 03-21-2013

Time to start another thread, I have another idea...

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