What modification does Fig. 7 show for the oil pump cover?

It shows a shaded portion of the oil pump cover to be removed and instructs to bore a hole right through at 19/32" diameter on the suction side, with detailed machining radii (e.g., 1/16" RAD., 11/16" RAD., 13/32" RAD.) shown in Section X–X.

How deep should the oil filter head material removal be in Fig. 8?

The scrap section X–X shows the removal is 1/16" deep maximum, with 1/16" radii at the edges.

What are the drawing reference numbers on this page?

Fig. 7 is referenced A.9517 and Fig. 8 is referenced A.9518; the page number is 458.

What width dimensions are given for the oil filter head modification?

The shaded portion spans 7/8" plus 7/8" (measured either side of the centerline) in Fig. 8.

Home/ Registry/ MG/ B/ “Lisa's B”/ Photo supermotors.net/registry/media/946875

MGB 18GB Engine Oil Pump Cover & Oil Filter Head Machining Diagrams (Figs 7-8)

Dimensioned engineering drawings of oil pump cover and oil filter head machining with section views

‹ ›

Engineering blueprint detailing oil pump cover and oil filter head machining with dimensions, radii and section views.

AI caption September 2012 · Photo 86 of 101

This page, titled "Other Special Items" (page 458), presents two dimensioned engineering drawings related to engine oiling modifications. Fig. 7 (drawing reference A.9517) is a diagram showing a portion of the oil pump cover to be removed. It shows the cover with a 2 5/16" reference dimension, instructions to bore a hole right through at 19/32" diameter (suction side), and a shaded area of the cover to be machined away. A detail view with Section X–X gives machining dimensions including 1/16" R, 3/16", 1/16" RAD., 1/4", 11/16" RAD., 13/32" RAD., 9/16", 1/8", and 7/64". A note states that part of this machining is already incorporated on 18GB engines. Fig. 8 (drawing reference A.9518) is a diagram showing a portion of the oil filter head to be removed, with a shaded portion identified, 7/8" + 7/8" width dimensions, and a scrap section X–X showing the removal to be 1/16" deep maximum with 1/16" radii. The page gives a machinist the exact geometry needed to modify the oil pump cover and oil filter head, likely as part of an engine tuning/preparation procedure.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What modification does Fig. 7 show for the oil pump cover?: It shows a shaded portion of the oil pump cover to be removed and instructs to bore a hole right through at 19/32" diameter on the suction side, with detailed machining radii (e.g., 1/16" RAD., 11/16" RAD., 13/32" RAD.) shown in Section X–X.
Is this oil pump cover machining needed on all engines?: The note under Fig. 7 states that part of this machining is already incorporated on 18GB engines.
How deep should the oil filter head material removal be in Fig. 8?: The scrap section X–X shows the removal is 1/16" deep maximum, with 1/16" radii at the edges.
What are the drawing reference numbers on this page?: Fig. 7 is referenced A.9517 and Fig. 8 is referenced A.9518; the page number is 458.
What width dimensions are given for the oil filter head modification?: The shaded portion spans 7/8" plus 7/8" (measured either side of the centerline) in Fig. 8.

Comments

No comments yet.

More from this build

Looking down the open throat of a single-barrel carburetor showing venturi and brass jet

Close-up down the throat of a sidedraft carburetor showing bore, flange and brass needle

Close-up looking down the throttle bore of a sidedraft carburetor with air cleaner removed

Close-up into the throttle bore of an SU-type carburettor with float bowl

All 113 photos of this build

More MG Bs

1962 MG B “OxCart”257 photos

1970 MG B “The B”13 photos

1980 MG B “Blackie”3 photos

The MG B registry