OT - I think I found the problem, valves

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Model T Ford Forum: Forum 2013: OT - I think I found the problem, valves
Top of pagePrevious messageNext messageBottom of page Link to this message  By Rob Heyen - Nebraska on Friday, November 29, 2013 - 06:29 pm:

One cylinder wasn't firing. The plug was firing, sooooo, rings?

When I unscrewed the jug valve plugs, this is what I saw. Compression was 20 lbs.




Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Dallas TX on Friday, November 29, 2013 - 06:55 pm:

Way too rich.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Thode Chehalis Washington on Friday, November 29, 2013 - 07:03 pm:

Can't tell for sure, is that a broken valve stem in the valve guide?


Don't worry, 5 out of 6 will get out down the road fast enough.
Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By Herb Iffrig on Friday, November 29, 2013 - 07:20 pm:

What id this on?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Mark Gregush Portland Oregon on Friday, November 29, 2013 - 07:24 pm:

Where is the valve head?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce in Dallas TX on Friday, November 29, 2013 - 07:29 pm:

OK, if you saw that and didn't remove the valve for the picture it is pretty serious. You gotta wonder if the valve is not there, where else would it be. Oh dear.......


Top of pagePrevious messageNext messageBottom of page Link to this message  By Stephen D Heatherly on Friday, November 29, 2013 - 07:45 pm:

Rob, model N?

Stephen


Top of pagePrevious messageNext messageBottom of page Link to this message  By Rob Heyen - Nebraska on Friday, November 29, 2013 - 08:38 pm:

It's on the K. The number six cylinder was sucking air at the intake, and running much too rich. We thought it was a carburetor issue until I noticed a few drips of gas coming from the intake manifold gasket at the back cylinder.

Meanwhile, it had carboned up so bad the valves must be leaking badly, there was almost no compression (hope the rings aren't leaking too).

I'm trying to get in and clean the seats, then lap in the valves (first time "lapping" for me). Dean Yoder is walking me through it over the phone as I go. The exhaust valve was pitted, but a fellow in town was able to grind both valves.

Rob


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