Replace the grommets and washers used to hold the cover on if they seem
hardened. That little tube you mention is normally connected to the
emissions canister. If truly blocked off you should be using a vented cap.
Mike
'79B
----- Original Message -----
From: "John Graham" <theklube@hotmail.com>
To: <mgs@autox.team.net>
Sent: Thursday, June 12, 2003 7:13 AM
Subject: MGB - 1970 Rocker Arm Cover Leakage
> Now that I'm beginning to drive the beast again, I'm looking to fix things
> that I never got around to before - oil leaks in the engine area. From
what
> I can observe, my leaks are coming from the rocker arm cover area. I'm
> planning to renew the gasket there, but in looking at the situation, it
> appears that some leakage may be coming from the area of the front bolt
> holding the cover down.
>
> This got me to wondering if there might be a pressure situation in the
> crankcase that was forcing oil out. I looked the top of the engine over
> (it's a 1970) and I didn't see any form of crankcase venting arrangement.
> There's a little tube coming out of the back of the cover which is stubbed
> off, but I believe that to be stock.
>
> I can deal with the business of renewing the gaskets around the cover, but
> is there some other situation that I should look into regarding this
> leakage? I haven't checked my compression in a while, but the engine runs
> well, other than idling a little rough because the RPMs drop down to
500-600
> when it's warm. I think I just need to adjust that.
>
> Thanks for your help,
>
> John Graham - Charlotte, NC USA
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