[Mgs] Ugly tappets

[Max Heim]

OK, what about the proposition that this is wear caused by lack of zinc
additives in Castrol 20W50? Comments?



on 1/11/09 2:18 PM, Richard Ewald at richard.ewald at gmail.com wrote:

> Can you install just new tappets?
> Sure.
> The question is should you install just new tappets?  IMHO no.  Tappets are
> supposed to spin while the engine runs.  It appears to me that your tappets
> haven't been spinning, causing the concave wear pattern.
> If it were my engine (and I have BTDT) I would install a new cam and new
> lifters.
> $.02
> Rick
> 
> On Sun, Jan 11, 2009 at 12:22 PM, Max Heim <max_heim at sbcglobal.net> wrote:
> 
>> Before I started reassembling the head on my MGB, I thought it would be
>> prudent to take a gander at the tappets. It turned out they were pretty
>> nasty looking. See photos here:
>> 
>> http://www.flickr.com/photos/mvheim/sets/72157612402265283/
>> 
>> In brief, they were pitted, the edges were chipped, and none of them showed
>> the faintest trace of convexity -- in fact, they would be better described
>> as concave. Numbers 4 and 8 even had clear wear patterns showing that they
>> had not been rotating at any time recently.
>> 
>> Curiously, the cam lobes themselves appeared perfectly smooth, with no
>> grooves, and the plating did not appear worn through.
>> 
>> So I'm wondering if I can just install a new set of tappets and break them
>> in. Comments?
>> 
>> --
>> 
>> Max Heim
>> '66 MGB GHN3L76149
>> If you're near Mountain View, CA,
>> it's the primer red one with chrome wires


--

Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the primer red one with chrome wires