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Home > 998cc > pitted valves

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1137 Posts
Member #: 1450
Post Whore

Near Paris - France

14th Sep, 2009 at 11:25:41am

Hi everyone,

On my 12G295 head, I cleaned the valves and they are quite pitted (lots of small holes) especially the exhausts.

Shall I replace them or is it no big deal ?

Rusty by nature

On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!"


Vegard

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7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

14th Sep, 2009 at 11:27:36am

You have them reground...

It IS a big deal.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

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1137 Posts
Member #: 1450
Post Whore

Near Paris - France

16th Sep, 2009 at 08:18:42am

I'll put some pictures on.

Big deal is they can disintegrate ?

I'll have to check reground vs buy new because everything is so crazy these days ...

Rusty by nature

On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!"


Vegard

User Avatar

7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

16th Sep, 2009 at 08:20:14am

No, they won't disintegrate, but they wont seal. 10% leakage is a 10% drop in power...Do you want that?

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

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1137 Posts
Member #: 1450
Post Whore

Near Paris - France

16th Sep, 2009 at 08:55:26am

Pitt are not on the matting surface and of course valve will be lapped.

I would have fear the small dents / hole might be a starting point for general failure, not that they will lead to leakage.

I'll put pictures this week and we'll start the conversation from there

Rusty by nature

On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!"

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