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MG MGB Technical - Images of Alloy Valve Covers

In the Moss catalog, they sell an Alloy Valve cover in both polished and in black, with a ribbed top.

Does anyone have these on their car and if so would you be so kind as to post me an image of what it looks like? I am especially interested in the black.

If you have one of the valve covers are you happy with it?

Thanks,

Robert
1973 MGB
Robert Browning

There is a picture of my polished cover here: http://asciimation.co.nz/pics/page13.html

Is that the same kind? Mine was from Moss.

Simon
Simon Jansen

Hi Robert

We use the Moss alloy covers on all our MGB engines, they look great, much better than a dented old style one. A word to the wise, the covers have a slight grey gunge on them inside and out, beware as this is polishing wax and has abrasive in it and MUST be cleaned off before fitting.

Peter
peter burgess

A 73 originally had a charcoal canister and anti-runon system which relies on the port on the back of the factory cover. If changing the cover you need to consider what to do about this and crankcase ventilation if the new one doesn't have the same port (which all the ones I have heard of don't have).
Paul Hunt

Simon - thank you - this is what I wanting to see.

Peter - thanks for the heads up.

Paul- as usualu, you are right on the money. My car is a 1973 and I do have the charcoal canister and I was wondering what was I suppose to if I change valve covers to handle this?

Thank you.

Robert
Robert Browning

Robert: I don't have the evaporative emissions canister on my Magnette, but I need to get the valve cover from Moss for that application because I changed the way my crankcase ventilation works using a plate from Doug Jackson to control the tappet cover leaks. Here's a picture showing the tap on the side of the valve cover that you would use to go to the canister instead of the carbs like mine is setup.

John Perkins

Robert, here's a photo taken by Gryf Ketcherside of a Midget engine with the black cover with polished fins. The B cover looks about the same.

Bill Young

Bill, I like your cover a LOT. Did it come with the polished ribs or did you do that?

Also, I have to ask, what is the big silver hose? Do you have an A/C unit? Also, over at the btake master cyliner area you have three fluid containers? Clutch - Btake and ????

John, was the connection (hole) already in the valve cover at that location?

Thanks,

Robert
Robert Browning

Robert-
Victoria British offers two cast aluminum alloy rocker arm covers that have provision for the needed restrictor tube, both in either polished aluminum alloy* or black powder-coated finishes. One is for the 18G and 18GA engines (Victoria British Part #s 17-714* and 17-715) and the other is for all of the 18GB, 18GD, 18GF, 18GG, 18GH, 18GJ, 18GK, and 18V five-main-bearing engines (Victoria British Part #s 17-716* and 17-726). Both use a non-vented oil filler cap (Victoria British Part # 17-696) that that is not interchangeable with any of the Original Equipment oil filler caps.
Steve S.

Thanks Steve

Robert
Robert Browning

You're welcome, Robert. Glad to help.
Steve S.

I bought one about ten years ago, but didn't get round to fitting it for five years. It was to low for the rockers, and I had to use two cork gaskets.
c cummins

If you don't use a vented rocker cover, crankcase breathing is easy enough to restore simply by using a vented oil filler cap. However that leaves vapour capture and the anti-runon valve. If you find you don't need the valve, then that is no problem. If you don't seal the canister port that used to go to the rocker cover you will get petrol fumes high up in the engine compartment which you will almost certainly detect in the cabin. If you do seal it up then with crankcase breathing no longer going through the canister to keep it clear it could get blocked, which could cause problems with the tank and float chamber vent system interacting and causing flooding or fuel starvation. The best route is probably to seal the old rocker cover port, then empty the canister, and make sure its fresh-air port via the anti-runon valve goes to the bottom of the engine compartment, like float chamber pipes do on cars without the canister. And hope you don't need the anti-runon valve.
Paul Hunt

This thread was discussed between 01/05/2009 and 03/05/2009

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