Big Block Oil Pick-Up and Screen

[Joe L.]

A very recent question regarding the 1968 L-36 oil pick-up and screen brings to light an interesting issue regarding these pieces. As I mentioned earlier, I'll be posting some more complete and detailed information regarding these pieces when I get around to it.

However, for now, perhaps we can have another question for all of you to ponder. This one is WAY easier than the last one, so it should not take as long for someone to come up with the answer.

Here's the issue and question: most of the aftermarket engine parts catalogs specify an oil screen and pick-up for 1967-74 Corvettes with big block which is incorrect. They also specify the same one for just about every other Chevrolet big block application from 1967-75 but it's incorrect for those, too. It's functional, but nothing like the ones that were originally used. However, a pick-up of this configuration was used for ONE big block application during the 1965-75 period for either passenger car, Chevelle, Monte Carlo, Camaro, Chevy II, or Corvette.

Does anyone know what it was?

A picture of the oil pick-up and screen is shown below:

[Joe L.]

Re: Big Block Oil Pick-Up and Screen

All------


No one's going to take a stab at this one? Like I mentioned, it should be WAY easier than the last one.

[Ronald L.]

Re: Big Block Oil Pick-Up and Screen

Joe, is this an either-or question?

Or what year was the filter above use?

I do not understand what you are asking...

[Joe L.]

Re: Big Block Oil Pick-Up and Screen

Joe, is this an either-or question?

Or what year was the filter above use?

I do not understand what you are asking...

Ronald------


The oil screen and pick-up that I have pictured is the one currently sold in the aftermarket for all 1967-75 big block applications, Corvette and otherwise. However, this configuration piece was originally used for only ONE big block application, Corvette or otherwise, during the 1967-75 period. The question is what was that application?

[Ronald L.]

Re: Big Block Oil Pick-Up and Screen

Joe,

BB Only

67 - 75 means that it crosses 427 to 454 usage

That eliminates any tri power set up as those did not make it to the 70's.

Are we on track?

[Joe L.]

Re: Big Block Oil Pick-Up and Screen

Joe,

BB Only

67 - 75 means that it crosses 427 to 454 usage

That eliminates any tri power set up as those did not make it to the 70's.

Are we on track?

Ronald-----


It was not used over that entire period. It was used for only part of that period. I mentioned that period only because that's the period that the aftermarket SERVICE piece I depicted is cataloged to cover. However, this piece was not used in PRODUCTION over the entire 67-75 period. It was used for only ONE application over that period. It is a big block-only piece.

[Robert G.]

Re: Big Block Oil Pick-Up and Screen

I'd guess passenger car for the following reason: that pump looks very shallow and maybe the passenger car had a shallower oil pan AND may have used only a 5 quart system. As to the year? maybe 1965 because they figured they'd better switch to a 6 quart system. How's that?

[Joe L.]

Re: Big Block Oil Pick-Up and Screen

I'd guess passenger car for the following reason: that pump looks very shallow and maybe the passenger car had a shallower oil pan AND may have used only a 5 quart system. As to the year? maybe 1965 because they figured they'd better switch to a 6 quart system. How's that?

Robert-----


That's a good try, but that's not the one application this piece was originally used for.

[Ronald L.]

Re: Big Block Oil Pick-Up and Screen

Joe, L88...

[Robert G.]

Re: Big Block Oil Pick-Up and Screen

I'll try again, Joe. The pick-up had to service all big blocks 65-74, including the one with the shallowest oil pan, which I would guess is either the Corvette or a passenger car pan. I believe their were top end oiling problems early on, so this would be a later design pick-up. As to the vehicle, and application, I don't know. Am I on the right track?

[Ronald L.]

Re: Big Block Oil Pick-Up and Screen

While we are waiting for Joe...

Since I put mine all back together and also had a suspicion there was a top end oiling problem from my 49K original motor's appearance...

Well I put the more original appearing screen back on, and there was a post I made to just that extent back in January, I hope that's OK.

[Joe L.]

Re: Big Block Oil Pick-Up and Screen

Joe, L88...

Ronald------


Yes, you got it. The style pick-up pictured was, as far as I have been able to determine, used in PRODUCTION only for 1967-69 L-88 which, of course, was a Corvette-only engine. It was NOT used for ZL-1, though; ZL-1 used a conventional oil pick-up and screen assembly as used for other 1969 big blocks.

Including the L-88 piece, there were 4 different oil screen and pick-up assemblies used for Corvette big blocks over the 1965-74 period and one additional piece that was SERVICE-only. However, from what I have been able to determine, the L-88 piece was never available from GM in SERVICE as a separate piece; it was supplied only as part of the pump assembly.

Later, I will be posting more information on these 65-74 oil pick-up and screen assemblies when I get around to it.

[Ronald L.]

Re: Big Block Oil Pick-Up and Screen

Joe, don't wait too long!

If you go back to January you'll note the thread where I had a screen on my 66 that was larger that what Melling was selling as original. In all cases the engine people said there was no more restriction with that that what the pipe had and the pipe was never full of oil - we'll wait for the expert to tell us...

[Clem Z.]

Re: Big Block Oil Pick-Up and Screen

Ronald------


Yes, you got it. The style pick-up pictured was, as far as I have been able to determine, used in PRODUCTION only for 1967-69 L-88 which, of course, was a Corvette-only engine. It was NOT used for ZL-1, though; ZL-1 used a conventional oil pick-up and screen assembly as used for other 1969 big blocks.

Including the L-88 piece, there were 4 different oil screen and pick-up assemblies used for Corvette big blocks over the 1965-74 period and one additional piece that was SERVICE-only. However, from what I have been able to determine, the L-88 piece was never available from GM in SERVICE as a separate piece; it was supplied only as part of the pump assembly.

Later, I will be posting more information on these 65-74 oil pick-up and screen assemblies when I get around to it.

what was the part# of the pump assy that used these pickup. i never saw one.

[Joe L.]

Re: Big Block Oil Pick-Up and Screen

what was the part# of the pump assy that used these pickup. i never saw one.

clem------


The first one was GM #3946026. It was replaced by GM #3964259 in March, 1970. The latter was replaced by GM #475902. The 475902 was discontinued without supercession quite a few years ago. I have an NOS example of the 475902.