Hi Jim,
A spark in the nether regions of my brain has just been set off!
Thinking back on some of your previous posts, you wrote about some misgivings
to the shattered condition of your pilot bush. Now you've written about a
brazed on oil pump cover.
As I recall, you have a 1275 engine in your car. With the info above, I'm
wondering if you have an incorrect engine backing plate.
The 1275 has a thick plate with the oil pump cover pinched in place between
the backing plate and the backing plate gasket with the gasket against the
block. The 1275 pump cover does NOT have MOWOG stamped into it, but rather a
raised circle about 3/4" in diameter
The 1098 has the same arrangement with the gasket and cover, but the cover has
MOWOG stamped into it. Both the 1098 and 1275 backing plates are 3/8" thick.
They do have the pump cover in a slightly different location between the 1098
and the 1275.
The 948 came with a soldered on pump cover that was prone to fatiguing the
solder and then leaking a lot of oil. It was soldered onto the transmission
side of the plate. The plate was also a stamped steel one with a partially
rolled edge to give it some stiffness.
Now, if a thin plate is used on a 1275 block, it will fit, but not properly,
then the trans input shaft will go too deep into the end of the crankshaft,
possible bottoming out and damaging the input shaft bearing, or just deep
enough to work, in either case possibly damaging the pilot bush.
As for the clearance between the flywheel and the pump cover, that's usually
about .050-.060". Not a lot, but plenty.
So, what is the thickness of the plate in use on your engine?
How is the cover brazed to the plate?
What is the part number cast into the plate?
Paul A
----- Original Message -----
From: Jim Johnson
To: Rick Fisk
Cc: Spridgets ; midgetsprite@yahoogroups.com
Sent: Sunday, January 22, 2006 7:45 AM
Subject: [midgetsprite] Re: Bolt and thread question...
Thanks to all for the bolt size & thread...etc. Last time I got
this far into an MG was my old '46 TC over in England and there
everything was a mix of SAE, British Standard Fine, and Whitworth.
Lord, what a RPIA!! Nice to know the spridgets are all SAE fine!
Have just about all my parts and will hopefully have the Midget
back on the road in a couple of weeks. One thing is a little
bothersome... on the back plate, there is a round raised area
with the MOWOG emblem on it. This is the part that looks like
it has been brazed back on. While the flywheel isn't exactly
hitting it, the clearance between it and the flywheel is probably
in the area of a few thousands!! You can barely see light between
them! Should it be that close??
I've decided to clean some of the oil and crud out of the engine
bay before putting everything back in but I'm not ready to do the
whole restoration thing in there just yet. I'm thinking steam
cleaning or Simple Green and carwash pressure hose. Anyone
offer any suggestions on this??
Cheers!!
Jim - disassembled Midget in Dodge City
--
1964 R60/2
1968 MG Midget
1976 R90/6
1990 K100LT
**Don't underestimate the power of stupid people in large groups.**
[Non-text portions of this message have been removed]
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