The head is off the Astra... good news?

Started by JamesV6CDX, 12 July 2009, 17:56:54

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JamesV6CDX

12 July 2009, 17:56:54
Well seeing as the forecast wasn't quite accurate, and we have had beating sun today, I removed the head from the Astra.

Not a bad little job. No major snags really. I removed the exhaust manifold, popped cambelt off, took all the intake rubbish and connectors off - and removed the head along with inlet manifold as one. Then removed inlet manifold with head on the floor.

I looked into the exhaust valve ports - all dry. Loads of white deposits on no4 exhaust valve stems.

Looked in inlet ports - bl@@dy hell - looks a bit wet! The valve seats look like they're covered in oil

Hopefully a simple stem seal job will fix this - fingers crossed  ::)

What does anyone think about a tad of skimming, given that it's LPG?  8-)

JamesV6CDX

#1
12 July 2009, 18:01:07
Oh - I think it will run better on LPG when it's back together too. Found a good old split where the feed pipe comes out of the vaporisor..   ::)

JamesV6CDX

#2
12 July 2009, 18:09:36
Just to add - the bottom of the valves on no1 cyl all have loads of white deposits on them.

Does this mean that cylinder has been running lean?

JamesV6CDX

#3
12 July 2009, 21:54:03
What colour were the stem seals fitted to these engines in the factory?

I always thought they were green.

The ones in this car are red - did VX ever use red seals, or has this beast been apart before....  :-/

Martin_1962

#4
12 July 2009, 23:30:38
QuoteWhat colour were the stem seals fitted to these engines in the factory?

I always thought they were green.

The ones in this car are red - did VX ever use red seals, or has this beast been apart before....  :-/


Original heads in my 2.6 have red seals

Marks DTM Calib

#5
13 July 2009, 08:26:30
The red seals are the shite ones that fall off

JamesV6CDX

#6
13 July 2009, 21:43:44
QuoteThe red seals are the shite ones that fall off

Well the 4 that came out so far, were unusually easy to remove - came out with normal pliers very easily.

Interestingly, the valve stem went up and down with no grip at all, they are shot to hell...

Pot 1 is the worst, loads of black gunge on the valve seat areas... these are the valves that are covered in white deposits too, I reckon it's due to oil burning in the cylinder...

Marks DTM Calib

#7
14 July 2009, 08:06:48
Oil burning wont cause white deposits
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