The more you look, the more rubber is bad. Harmonic balancers for the MGB

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I’m beginning to get the feeling that there isn’t a single piece of rubber in the MGB GT or either of the two engines that I have that hasn’t rotted away to some degree. I’ve been looking at the harmonic balancer, crankshaft damper, torsional damper, whatever you want to call it form both engines and they both look a little suspect.

As expected, the original 1967 engine that spent most of its life in hot and smoggy Southern California is the worst off. The rubber is almost solid having lost most of the flexibility in 50 years of heat and abuse. Looks like windshield wipers do within a few years down there but at least you don’t often need windshield wipers in SOCAL.

1967 MGB 18GB harmonic balancer with cracked rubber
1967 MGB 18GB harmonic balancer with cracked rubber
1967 MGB 18GB harmonic balancer with cracked rubber
1967 MGB 18GB harmonic balancer with cracked rubber

Here’s the later 1972 18V engine harmonic balancer. It certainly looks better with only light cracking and the rubber still has a little give happening. I guess being a Canadian MGB with cooler weather has been good to it.

1972 MGB 18V harmonic balancer
1972 MGB 18V harmonic balancer
1972 MGB 18V harmonic balancer with cracked rubber
1972 MGB 18V harmonic balancer with cracked rubber

If I’m going to get one of these rebuilt or buy a new one I need to do it now. Once the engine is back in the MGB it will be a PITA. These balancers are expensive with prices ranging anywhere from about $100 to $200 or more. And that’s in US dollars, add 40% for our Canadian pesos. I think the 18V might just have to make do for a few years.

And then, I just cleaned the front lower A arm pivots that have been eaten by rust, another story!

 

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