Engine breathing and oil consumption.

Technical MGB discussion
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Charles Farran
Posts: 210
Joined: Fri Oct 31, 2014 11:08 am
Forename: Charles
Surname: Farran
Location: Warwickshire

Re: Engine breathing and oil consumption.

Post by Charles Farran » Fri Apr 19, 2019 12:58 pm

Graham's solution seems (hopefully) to be a relatively easy & modest cost fix until you look to change the head to unleaded when you can use the opportunity to get at the tappet chests & possibly replace the front one. When i did mine i removed the exhaust manifold with the exhaust still attached, simply removing the front stay to the block underneath & swinging the exhaust away by a couple of inches that gives room to access the tappet chests.
Cheers, Charles
1980 Roadster

Vic Butler
Posts: 514
Joined: Wed Dec 21, 2016 6:07 pm
Forename: Vic
Surname: Butler
Location: North West Hampshire

Re: Engine breathing and oil consumption.

Post by Vic Butler » Tue Apr 23, 2019 3:47 pm

I took my MG for a shakedown run on Easter Saturday after fitting a rebuilt distributor without vacuum advance. It ran like a bag of nails. Today I discovered the oil filler cap on the alloy cover was loose and obviously upsetting the breathing. I moved the distributor clockwise until the engine kicked back against the starter and moved it back a fraction when it didn't kick back. Another road test sometime. Of course,moving the distributor say 1 degree doubles that as the distributor is half engine speed. Unfortunately there is no rolling road or MG specialist around where it could be fine tuned and the mixture sorted out which I think needs enriching at higher revs.

Dave Wheatley
Posts: 122
Joined: Fri Sep 28, 2018 4:55 pm
Forename: Dave
Surname: Wheatley
Location: SW Scotland

Re: Engine breathing and oil consumption.

Post by Dave Wheatley » Tue Apr 23, 2019 7:24 pm

Charles. Unleaded head mods nearer than I thought - see new post re Valve seat inserts.

Vic. Always remember - MG owning is fun!

1978 MGB GT
1931 Austin 7 RM
1955 Standard 10
1972 Ford Cortina
No modern!

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