Gregory Bender

Oil filter addition - Adapting an existing block to use an internal filter

Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

Updated:

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Guzziology covers this technique fairly well. A few pointers from when I converted my Ambassador:

George Dockray's write-up

George Dockray did a brief write-up about this technique and posted it on the Guzzi Power website. There is a minor error in his write up with regard to the proper size holes to drill in each location. Paul Linn caught the error and sent me the corrected version:

Modifying Non Filter Cases to Filter Style by George Dockray

Even though Guzziology gives a complete run-down for this mod, here are some pictures that will make the process a bit more clear.

(A) Plug threaded hole from pre-filter main bearing housing with red Lock-tighted aluminum bolt.

(B) Drill 8 mm (516 inch) hole through existing boss at bottom of case.

(C) Existing main bearing hole is blanked off by new filter-type main bearing housing.

(D) Drill 10 mm (38 inch) hole through existing boss at bottom of case.

(E) Using new filter-style main bearing housing as a guide, drill & tap 8 mm relocated mount hole.

George Dockray
geodoc@telus.net

Photo courtesy of George Dockray.

Photo courtesy of George Dockray.

Rob Anderson's write-up

Thanks to Rob Anderson for providing the following information on the Yahoo! Loopframe_Guzzi news group. In Rob' own words:

I am rebuilding my ‘74 Police Eldorado. The chrome bores had worn through and been circulated through the engine. Mains had bits of chrome embedded in them and journals scored (but not too badly) I decided to go 1st undersize on mains and big ends and use a later sump with oil filter. The only modification I had concern about was drilling the new 8 mm oil gallery to the later style front main bearing. I was able to do it myself on a good drill press and some set-up time.

Photo courtesy of Rob Anderson.

Photo courtesy of Rob Anderson.

Photo courtesy of Rob Anderson.

Photo courtesy of Rob Anderson.