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September 29th, 2008

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Q & A: Valve Train Noise

Friday March 29th, 2002
Q & A, MGA, MGB, MGC, MG T-Type, Midget
John, a quick synopsis before my question: I by a 68MGB-GT not running.
Get
it running. Excessive valve train noise. Pull CAM, chunk of first lobe
missing. Tappets look like 50 year old hammers. Bore of #1 tappet appears
to
have small shiny flecks of metal imbedded into walls. Replace CAM,
tappets,
push rods, rocker assembly. Only minor help. Have engine rebuild performed
($2500) foolishly thinking block will get visual examination, etc. Rebuilt
engine sounds the same as before rebuild. Conclude only cylinders rebored,
tappet bores probably NOT rebored and then fitted with oversize tappets.

So here's the question. ARE there oversize tappets available for the MG
series B engines? Is the famous remark "oh, some of them just sound like
that" caused by worn tappet bores?

The first question is: what is making the noise in your engine? The second
question is: Does this noise indicate some fault with the engine or is it
just bothersome? The third question is: How can I quiet the engine?
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