Distrubor High-Lift cam recognition.

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Bill Ritson
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Joined: Wed Nov 27, 2013 8:09 am

Distrubor High-Lift cam recognition.

Post by Bill Ritson » Wed Jun 26, 2019 1:21 am

TC 9981 has had an unusual history in that it appears to have spent the first 40 years of its existence on rubber plantations in Malaysia, where, I would imagine, spares were hard obtain and local ingenuity was required to keep it of the road. (The history file also indicates that occasional visits to a gunsmith were also necessary: Lord knows why!)
Among many relatively minor alterations, the original engine was replaced with one built with a 24445 block which could quite possibly have come from a TD. The engine number appears to have been obliterated.
My problem is that I have invariably set the points to 11 thou and the plugs to 21 thou as per the TC instruction manual. However I have found that the points seem to need cleaning and adjusting every 1000 miles, and only last about 3000 miles before they become so severely pitted that they required replacement. I am wondering whether the distributor is from a TD type engine and if so whether it would be fitted with have a High-Lift cam. If so, should the points be set to 15 thou and plugs to 25 thou?
Can anyone tell me HOW to discover firstly whether the distributor is a TD type and secondly whether it has a High-Lift cam fitted.
Kind regards, Bill Ritson.

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Location: Soerup Germany

Re: Distrubor High-Lift cam recognition.

Post by cdrolshagen » Wed Jun 26, 2019 2:07 am

Hi Bill,
have a look here - http://www.mg-tabc.org/library/distributor.htm
cheers Carl

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Joined: Wed Jun 20, 2018 11:48 pm

Re: Distrubor High-Lift cam recognition.

Post by jddevel » Wed Jun 26, 2019 10:41 am

You have considered the condenser I suppose?

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Steve Simmons
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Location: Southern California

Re: Distrubor High-Lift cam recognition.

Post by Steve Simmons » Wed Jun 26, 2019 11:52 am

I agree, my first thought was a bad condenser causing the pitting. Also be sure to lubricate the cam lobes if you haven't already.
1949 TC8975 / XPAG 9609
1949 TC9849 EXU / XPAG 10507

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