What modifications need to be made in a 98 block to not starve the bearings?

 

I opened up the crossover galley on the rear cover and made a matching one on the block with an air grinder, using an old gasket as a template.

 

I had an ls6 oil pump installed.

 

Anyone else?

 

nice pic its a very simple mod i will be doing soon when i rebuilt mines

 

I will be doing that very soon, great pic there. How deep is it?

You'll want to upgrade to an ported/LS6 pump with the heavy spring. Use good oil also. If the engine is out port out the back as pictured.

 

Does that help other than feeding passenger side lifters better ? Bearings are fed from driver's side

 

The pump is definitely an upgrade from the crappy LS1 pump. Not necessarily a ported LS6 one though. Just a stock one should suffice.

 

I did it after reading an issue of CHTP or PHR where they discussed the differences between the blocks over the years, and they mentioned that this was a big problem in the early blocks. I asked one here about it and didnt get much response.

I decided to go ahead and do it, opened up the rear cover's cross over port first, then got the ***** to go caveman on my block. I also smoothed out the sharp edges. I want to know how deep I can go, I only went in about .125.

SInce I did this I have read that Steve D does this (correctly with a CNC machine) so I guess it was a good guess on my part. I'd still like to know how deep he goes.

 

The pic Ive seen that someone did with a cnc looked like it was about 1/4" deep. I'll see if I can find it. There was a BIG article on the differences and said this was the biggest difference.

 

Yeah, I'm thinking of going a full 1/4". I may strip her down own last time and do it.

I'd love to see the CNC pic. I also remember seeing that article where it said that this was the biggest difference between blocks, and I even posted a thread asking if the problem was here, in the rear oil galley crossover or the pump.

I've taken apart a 98, 99 and 01 ls6 pump and measured everything all dimension were the same. relief valve diameter & length, gerator thickness, inlets and outlets. The only difference that I didnt test/check was the metal type and the spring pressure.

 

starve the bearings?i've been beating on my car daily for 5 yrs and now i hear this? i guess i need to get on here more often....