Valve condition?
Author
Discussion

Stee111e

Original Poster:

8 posts

103 months

Sunday 27th May 2018
quotequote all
Can any one help identify any potential issues with these valve. The exhaust side is very white and look pitted but with no breakages nor bent valves. Cylinder two (pic two), had low compression, has one valve that us quite oily. The gasket was not in great condition, but no obvious fail between cinder and coolant.

Do these images tell the a story of the engine condition.

The gasket defo needs replacing but I'm concerned it could be an issue with the ri gs but the bores look in good condition with no scoring.








E-bmw

13,635 posts

183 months

Sunday 27th May 2018
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You say number 2 had low compression, was that dry or both wet & dry?

Mignon

1,018 posts

120 months

Sunday 27th May 2018
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An obvious problem is that the exhaust valves on No 2 are different colours which means one might not be seating properly but you need to strip it down and check the valve seats and see if they seal properly and check guides for wear. No 3 looks a bit dodgy too.

Stee111e

Original Poster:

8 posts

103 months

Sunday 27th May 2018
quotequote all
E-bmw said:
You say number 2 had low compression, was that dry or both wet & dry?
That was both wet and dry. There was only a slight improvement when wet.

Stee111e

Original Poster:

8 posts

103 months

Sunday 27th May 2018
quotequote all
Mignon said:
An obvious problem is that the exhaust valves on No 2 are different colours which means one might not be seating properly but you need to strip it down and check the valve seats and see if they seal properly and check guides for wear. No 3 looks a bit dodgy too.
OK, so this my next question. Should I strip the head to check valve seating etc. I was hoping to just replace head gasket but was aware there may be further issues to investigate.

I think the best thing would be to strip head, check valves and probably take to a machine shop to reseat valves, possibly with some new ones.

Cheers



Mignon

1,018 posts

120 months

Sunday 27th May 2018
quotequote all
So i recommend you strip the head to check valve seating and you ask if you should strip the head to check valve seating??? Are you for real?

Stee111e

Original Poster:

8 posts

103 months

Sunday 27th May 2018
quotequote all
Mignon said:
So i recommend you strip the head to check valve seating and you ask if you should strip the head to check valve seating??? Are you for real?
OK, I'll ignore the arsy comment and thank you for your advice. I'll strip head. Thanks