I have a question concerning taking an automotive block and using for marine. I've read here that you need to remove a valve from center of oil pad and increase outer one to 30 psi spring.
Well, what are affects of not doing that, and also need more clarification as to this procedure.
Why, because I also needed to use auto block for rebuild a few years ago, and I don't believe anything was done to alter the automotive block, at least not by me, not sure about machine shop, but guess is no. I just bolted on remote adapter and off I went.
Really would like to know more details about this.
Thanks,
Rich

I use them all the time. Interested to see what is said on this.

Rich,
First of all, the information is for the GenV and Gen6 Big Blocks. If you dont change the "outer" bypass valve to the 30lb one, a lot of the oil will never get routed through the remote filter. The extra friction from the long oil lines will build up more than enough pressure to let the stock 15lb bypass valve open and circulate the oil right back to the engine without ever touching the filter. The 30 lb bypass will insure that all of your oil is filtered.

As far as the center bypass valve goes ... if you look closely at the block and oiling passages, leaving the center bypass in place will route the oil through several 90 degree turns and a couple of short passages before feeding it into the engine. It can restrict oil flow which is obviously not a good thing That bypass is there for when the GM factory oil cooler lines are attached to the two ports on the side of the engine block.

As I mentioned before, this only affects GenV and 6 big blocks. The older Big Blocks and all of the Small Blocks do not have this type of oil filter mount pad.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md

Read the thread on 'Oil Pressure Problems from stock hardware.'

It'll answer questions you don't even know you have yet!

the blocks all start from the same place...car/truck/marine