Why do we own old cars? Maybe many of you don’t, your old car is perhaps 10 years old and still runs well, you haven’t had to do any major repairs and you don’t even know what a spark plug is. We are spoiled these days! My wife’s 2007 Subaru Forester just keeps on running and my 2009 Ford F150 has only needed oil changes and a few recall items like leaking satellite antennas dealt with.

Then there’s the MGB. Old cars need work. They need spark plugs maybe every 6,000 miles or so, regular oil changes and… regular engine refreshing. What am I doing this week? Working on my 1972 MGB 18V engine cylinder head. Overall things are going OK although the slop that I previously found in the rocker arms is proving to be an issue. I pulled the old rocker assembly apart which was easy enough and discovered pretty major wear. Check it out!

MGB GT rocker shaft assembly
MGB GT rocker shaft assembly
Badly worn MGB rocker shaft
Badly worn MGB rocker shaft

That’s ugly! Being a smart guy (don’t ask my wife) I already ordered a new rocker shaft which was quite reasonably priced form the great folks at British Parts Northwest in Oregon. This shaft does look a lot better.

Old MGB rocker shaft and new rocker shaft
Old MGB rocker shaft and new rocker shaft

That sure looks better. Unfortunately a few of the rocker arms that were in the worst places have wear as well. Guess what? Maybe I’ll get a few new rocker arms for Christmas. Out of fairness to this design, replacing these parts on older cars is maintenance. We just don’t see this happening anymore with our disposable cars.

Worn MGB rocker arm
Worn MGB rocker arm
Decent looking MGB rocker arm
Decent looking MGB rocker arm

Where’s this heading? I have no idea. I’m thinking I might pull apart the rocker arm from the 1967 head and see what condition it’s in. They are apparently the same so I could use it without spending any more money.

Anyone want to buy a 1967 MGB GT?

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