[T3] oil pump size

Keith Park topnotch at nycap.rr.com
Wed Mar 21 17:29:48 PDT 2012


Yea, What Im finding is that all you can get are the flat cams so people are
using this "smaller" oil pump in the dual relief cases and Im worried that
this may be a problem.

Keith


Top Notch Restorations
topnotch at nycap.rr.com 
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback "Hothe"
65 Notchback "El Baja Rojo"
65 Squareback "Eggcrate"
87 golf "Winterat"
93 RX7 "Redstur"

-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
Sent: Tuesday, March 20, 2012 11:25 PM
To: type3 at vwtype3.org
Subject: Re: [T3] oil pump size

On 20 Mar 2012 at 22:48, Keith Park wrote:

> I was just looking thru my Bentley, and it says that the later engines
> with the dished camshafts Had "Larger" oil pumps than the earlier flat
> cam's used. 
> 
> I know these days they are using the flat cams with the matching pumps
> and saying that the oil Pump is the same size. is that true? Do the
> dished cams use "larger" pumps? 

I believe the latest stock size pump for the flat cam was 21 mm. The 
dished cam engines came with 26 mm pumps. Unless something has 
changed in the last few years, the "normal" oversize aftermarket 
pumps were 25 mm. Larger pumps, like maybe 30 mm, have been made, but 
they won't clear the Type 3 fan housing.

Lots of people think the 25s and 26s are the same. The difference is 
probably insignificant, but it's not quite zero. The OE 26 mm pump 
has the advantage that it has somewhat longer support for the pump 
input shaft, which is critical for longevity.

Can we still buy dished cams and the OE style pumps to work with 
them?


-- 
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

_______________________________________________
VWType3.Org mailing list - type3 at vwtype3.org
http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
Contact gregm at vwtype3.org if you need help with the list.




More information about the type3-vwtype3.org mailing list