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Posted by: Dr Evil Nov 29 2007, 02:48 PM

I have a stock oil tank with an aftermarket oil filter mount. I know that the ones some recommend have too large of an opening for the screw mount. The one that was on it before and the replacement are P-65, but pelican does not list this size for replacement, only OC-61 and others. I am confused as to what size I need. Help!

Posted by: Eric_Shea Nov 29 2007, 03:33 PM

Weird. I didn't know the mounts were ever made by anyone else. Measure and I'll let you know (I have one of each). If some are too big I would guess you have the early style that is stock for a -6 or say... a 1970 911

Posted by: Dr Evil Nov 29 2007, 03:36 PM

I got my mount kit from Rich Johnson that also makes the /6 engine mount that I bought. Nice guy, good stuff

Posted by: sixnotfour Nov 29 2007, 03:39 PM

small thread oc-61 is the one you need for a factory -6 tank.
big thread oc-54 is the late 911 or vellios i think uses.
there is a 73 911 oil filter adapter that is like the -6 and early 911, but has the big thread, kinda rare.

what you have , dunno ?

Posted by: Eric_Shea Nov 29 2007, 03:42 PM

(dig through your rubble pile and find the man some hot P&C's and cams!)

Posted by: Dr Evil Nov 29 2007, 03:47 PM

Shut up monkey boy! (Eric)

I'll measure the opening and look at the threads. I think it will be stock /6 and that the big ones I have found were for the later 911. The filters I had were from a parts stash my friend left me.

Posted by: sww914 Nov 29 2007, 05:34 PM

I've seen OC 54 and OC 61 on -6 conversions. I don't remember which filter fit which type of tank because I didn't need to know so I didn't look. I wouldn't remember anyway cause I can't remember shit, so I write it down when I remember to.

Posted by: rfuerst911sc Nov 29 2007, 07:25 PM

I just ordered from Pelican the OC61 to fit my DW Design tank. I was told the DW tank takes the OEM OC61 filter. I guess I'll see when they show up as I haven't installed the tank yet.

Posted by: Eric_Shea Nov 29 2007, 09:05 PM

The tank doesn't take anything. The filter console that mounts on the tank does.

Posted by: sixnotfour Nov 29 2007, 09:47 PM

The Vellios tank, it screws right to the tank. No adapter.


OC54 has 25mm threads
OC61 has 19mm threads

Posted by: Dr Evil Nov 30 2007, 09:53 PM

OC61 it is. I measured 17.88mm on the inside diameter of the filter, but the threads will of course be larger. AND, printed on the base of the filter was 3/4 (= 19mm). The others that I tried had to have been the 25mm because they were huge. Also, I was a bit stupid in that I was trying to get a 74 filter for my engine not realizing until now that the tank is a 70 (DUH).