1967 L-68 oil pan and windage tray

[Tim S.]

I am restoring a 1967 427/400HP L-68 engine. Do the two bolt hydraulic cam engines like this have both an internal oil pan baffel and a windage tray bolted the the main studs? Can anyone send me a picture of the correct pan internal shot and external shot. I am having trouble fitting the pan over the oil pump and pick up. I think I have the original pan and when I dissembled the engine it had a the windage tray bolted the the mains. Of course, I have a new melling pump and Paragon pick up.
The oil pan drain on my pan is in the rear and is offset to drivers side.
Thanks
Tim

[Joe L.]

Re: 1967 L-68 oil pan and windage tray

I am restoring a 1967 427/400HP L-68 engine. Do the two bolt hydraulic cam engines like this have both an internal oil pan baffel and a windage tray bolted the the main studs? Can anyone send me a picture of the correct pan internal shot and external shot. I am having trouble fitting the pan over the oil pump and pick up. I think I have the original pan and when I dissembled the engine it had a the windage tray bolted the the mains. Of course, I have a new melling pump and Paragon pick up.
The oil pan drain on my pan is in the rear and is offset to drivers side.
Thanks
Tim

Tim----


All 1967 Corvette big blocks used an external oil baffle. Your oil pan sounds correct. The elements of configuration you described are pretty much unique to Corvette oil pans. Any 1965-74 Corvette oil pan should work. so even if, by chance, you don't have a 1967 Corvette oil pan. it should still work just fine. Basically, the 65-74 Corvette pans are pretty much the same. The main difference is a change in internal baffling for 70-74.

The 65-69 external baffle was slightly different than the 70-74. However, the 65-69 baffle will work ok with a 70-74 pan. The 70-74 baffle will not work ok with a 65-69 pan, though, due to the difference in internal baffling of the pans.

[Tim S.]

Re: 1967 L-68 oil pan and windage tray

Thank you Joe

I may have a 70 and up baffel and the correct 65-69 pan then I suppose and that is causing the interference problem. Is the 70 and up baffel larger or smaller or just a different shape?
Thanks Tim

[William C.]

Re: 1967 L-68 oil pan and windage tray

We may be confusing the issue, there is an internal baffle that is a part of the pan assembly, but the hydraulic lifter engines do not use the extended bolts from the main bearings down and the secondary windage tray that the mechanical-lifter engines used. If you have the long studs, the low horse pan will not bolt up.

[Joe L.]

Re: 1967 L-68 oil pan and windage tray

Thank you Joe

I may have a 70 and up baffel and the correct 65-69 pan then I suppose and that is causing the interference problem. Is the 70 and up baffel larger or smaller or just a different shape?
Thanks Tim

Tim-----

The 1970-74 external baffle, GM #3967854, cab be identified by the 4 deep offsets at the stud mounting holes. The 1965-69 baffle , GM #3873878, did not have these off-sets. A photo comparing the 2 baffles is attached (originally provided by Michael Hanson).

Let us know which one you have.

[Joe L.]

Re: 1967 L-68 oil pan and windage tray

We may be confusing the issue, there is an internal baffle that is a part of the pan assembly, but the hydraulic lifter engines do not use the extended bolts from the main bearings down and the secondary windage tray that the mechanical-lifter engines used. If you have the long studs, the low horse pan will not bolt up.

Bill----


As far as I know, all 1965-74 Corvette big blocks used the external baffle regardless of whether HP, SHP, or HD.

[Tim S.]

Re: 1967 L-68 oil pan and windage tray

Joe

According to my 1968 dated Chevrolet parts book, they list the windage tray for all 65-68 396 and 427 (no exceptions listed). So I think you they must have come on both two and four bolt engines. In any case, I understand the difference in the trays thank you. It turns out the problem is that the original oil pump had an integral pick-up and it had a much sharper rearward bend than the aftermarket one from Paragon. The result is the aftermarket oil pump and pick up locate the screen too far forward and interferes with the pan baffel.
Tim

[Joe L.]

Re: 1967 L-68 oil pan and windage tray

Joe

According to my 1968 dated Chevrolet parts book, they list the windage tray for all 65-68 396 and 427 (no exceptions listed). So I think you they must have come on both two and four bolt engines. In any case, I understand the difference in the trays thank you. It turns out the problem is that the original oil pump had an integral pick-up and it had a much sharper rearward bend than the aftermarket one from Paragon. The result is the aftermarket oil pump and pick up locate the screen too far forward and interferes with the pan baffel.
Tim

Tim-----


I don't know of any big block that ever had an "integral" oil pick-up tube/screen. All were an interference fit in the pump cover orifice.

The pick-up in the attached photo should be identical to the original screen installed on 1967 Corvette big block applications.

[Philip C.]

Re: 1967 L-68 oil pan and windage tray

Joe I think Bill is thinking of the small block motors, your correct the 400 no douth has the windage tray. Phil 8063