ausmini
https://www.ausmini.com/forums/

Exhaust Guide Conundrum
https://www.ausmini.com/forums/viewtopic.php?f=2&t=16613		 Page 1 of 1
Author:  Mick [ Sun Feb 26, 2006 4:28 pm ]
Post subject:  Exhaust Guide Conundrum
I'm just pulling the 1275 engine out for shits and giggles and it's ten yearly freshen up with some essential maintenance stuff, a new RE13 cam and other goodies and a coat of fresh paint.

I've just noticed that some of the exhaust valve stems within the ports have a whitish ash attached to the top of valve itself, normally I wouldn't hassle over it but since I'm freshening things up....

No.1 and 2 have the white ash, No.3 is as clean as a whistle and no 4 has a brown deposit and a touch of what is obviously wet oil.

is this caused by oil coming down the guides, or from oil getting up past the rings?

Number 1:

Image

Number 2:

Image

Number 3:

Image

Number 4:

Image

Gratuitous picture of a naked rear end:

Image
Author:  drmini in aust [ Sun Feb 26, 2006 5:50 pm ]
Post subject: 
The white ash or brown stuff is from fuel additives etc, the oily one I would suspect has a worn valve guide or valve stem.
Unless the combustion chamber of that one has lots of carbon too, I doubt it is rings.
Guides are cheap- I'd replace them all. And any valves that have more than .001" stem wear. Compare to the top bit that doesn't wear. :wink:
Author:  Mick [ Sun Feb 26, 2006 7:43 pm ]
Post subject: 
I wonder then why number three is so clean??

Must be time for a head off anyway, I sense a pandora's box here...
Author:  drmini in aust [ Sun Feb 26, 2006 8:39 pm ]
Post subject: 
A water leak into a cylinder will make that one burn clean.. check head gasket.
Author:  Mick [ Sun Feb 26, 2006 9:08 pm ]
Post subject: 
Okley dokley, that's all lthe excuse I needed.

Turbo head gasket's the one to use eh?
Author:  TheMiniMan [ Sun Feb 26, 2006 9:20 pm ]
Post subject: 
Yep,,,the black one Payen P/N - BK450
Page 1 of 1 All times are UTC + 10 hours
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/