Camaro Research Group Discussion > Originality
396/325 (L35) Oil Line Fitting
Camarocards:
According to the AIM (U17 A3), the oil line fitting for an L35 that goes into the block utilizes item 6 (Bushing p/n 444030) and item 5 (Elbow p/n 444052). I've determined that the "Bushing" is nothing more than a reducing union and the part of this union that screws into the block is 3/8" NPT.
I ordered the Elbow from HBC and while I can't say I'm surprised (:)), the end of the Elbow has been machined for 3/8" NPT threads. While functionally this would work just fine and would clearly eliminate the need for the Union (Bushing), technically it's not correct unless the Bushing is a 3/8" to 3/8" Union which would make absolutely no sense. It seems that ALL of the Camaro parts suppliers offer the same "incorrect" fitting. Since my goal is to restore this car exactly the way it was originally built, I'd rather not eliminate the Bushing.
So, my question is, does anyone know what size either the Bushing or the Elbow is suppose to be? I could easily have the end of the Elbow machined down to the correct size if I know what size it should be. Hopefully someone has already gone down this path before me and could provide a little bit of insight.
BTW...this is for a '68 just for reference.
Thanks!
Bob
Mike S:
I have a '67 L35 and will take a look. The motor is out of the car at the moment so it's easy for me to remove the fittings and check.
It should be the same as a '68 L35. I should have an answer and some pics sometime tomorrow for you.
Mike
Camarocards:
Thanks Mike. Much appreciated!
Bob
copo:
I noticed the elbow fitting in the AIM is the same for L35 and L78 engines. The L78 blocks are drilled 1/2 NPT for the oil fitting hole. I assume the bushing is used for the L78 blocks only.
Camarocards:
I'm not so sure the elbow is the same for L35 and L78 engines.
BHC sells a kit that looks like it includes the bushing but the elbow appears to be different. I'm not saying this kit is correct but they also list the bushing separate and it does seem to be different than the L35 elbow.
http://www.heartbeatcitycamaro.com/store/product/25439/Camaro-Oil-line-kit-all-BB-396-375hp-1967-1968-1969/
http://www.heartbeatcitycamaro.com/store/product/16662/Camaro-Oil-line-adaptor-396-375-COPO-1967-1968-1969/
You may be on to something though. Paragon sells a 1/2 x 1/8 NPT fitting for use with Hi-perf 396 and 427 engines.
https://www.paragoncorvette.com/p-356250-oil-pressure-adaptor-fitting.aspx
They also sell a 3/8 x 1/8 NPT fitting.
https://www.paragoncorvette.com/p-356251-oil-pressure-adaptor-fitting.aspx
So maybe (?) the L35 Elbow has a 1/8 NPT thread and all of the Repop suppliers are incorrectly offering it as 3/8 NPT to eliminate the bushing???
Where did you find in the AIM that the Elbow fitting is the same for the L35 and L78 engines? The fitting (item 4) is certainly the same. I looked in the L78 section of the AIM but unfortunately there is no reference to the oil fittings. Now I'm beginning to wonder if the Elbow that is being advertised for use on the L35 is really correct??
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