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RE: Hardened Valve Seats

To: "Dave Wood" <dwood143@comcast.net>, "mgs" <mgs@autox.team.net>
Subject: RE: Hardened Valve Seats
From: "Dodd, Kelvin" <doddk@mossmotors.com>
Date: Thu, 8 Jan 2004 11:49:56 -0800
Dave:

These would be engines fitted with catalytic converters.  I can guarantee that 
a 1972 will have recession problems under normal daily use running straight 
unleaded fuel.  It won't happen overnight, and you don't gain anything by 
worrying.  My family ran a fleet of 1973 Austin Marina's and once the exhaust 
valve clearances started to move, the seats eroded pretty quickly.  I think my 
brother went through 3 used heads in as many months being too cheap to get one 
fixed correctly.

note "daily use" above.  These were cars that were driven daily and did not get 
the best mechanical attention.  YMMV


Kelvin.

 
> 
> Kevin,
> 
> Did your source say what year engines this started?
> A BL mechanic told me I didn't have to worry about that with 
> my 72 when they
> changed over to unleaded gas here in the States.  However, I 
> still put a
> lead additive in with each fill up.
> 
> Dave 72 B





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