XR8fella

i was down in melbourne last week, and the inlaws have a 2002 monaro CV8, they took it to performance joint who put exhaust and all that on it, and the guy there told them to only run PULP every 4th tank, otherwise it will harden the valves.
does this sound accurate ???

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mongrelEB

If the heads/valves are stock, personally I can see no reason.
Harden the valves??? Nah, I can't see it.

But maybe I'm wrong :)

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Pacemaker headers + 2.5" exhaust
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TopGhia

Never heard of that one, I thought hard valves were good valves. Was he talking about valve seat recession or something. A statement like that doesn't make sense.

My V8 has run on nothing but PULP for 220,000 k's and no valve problems - but we're talking about a Holden aren't we. :)

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rod

greetings all
"TopGhia" is right PULP help to stop valve seat recession

regards
rod

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Soxx

sounds like bollocks to me.

Rick.

TopGhia

That's the word I was looking for.

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XR8fella

so i can tell him it definatley sounds like crap, coz its a stock gen 3. his advice was from hanlans or something, in melbourne

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lx^el

tell them to get rid of the holden before they find out it's burning oil like no tommorow! :\

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ALex

LTDHO

I can't see how it would make a difference, I heard a simular theory with LPG but not with petrol.

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xdc351

Sounds spot on to me. It is holden, so from the factory it has 'soft' valves. They help make the complete package with 'crap' piston rings, 'dodgy' transmissions and 'wannabe' magna styling.


Really though, any car that runs on unleaded from the factory would have hardened valve seats. Any older engine running unleaded should have them too, same goes for LPG. The lead in the old fuel would protect the seats, since it was removed every car has to run the hardened seats or the valves will eventually wear into the head.

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