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B valves

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2011dandd View Drop Down
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Joined: 25 Jul 2018
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 2011dandd Quote  Post ReplyReply Direct Link To This Post Topic: B valves
    Posted: 03 Jul 2019 at 4:05pm
From the front, the radiator end! what comes first? The exhaust or the intake valve?
Cheers guys
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Dick L View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jul 2019 at 5:35pm
Exhaust! Look at your manifold and follow the cast tubes.

You have an exhaust valve and then the intake for number one. The next valve is the intake for number two then the exhaust. The intake valves share one port and each cylinder has its own exhaust port.



The intake valves are larger.



Edited by Dick L - 03 Jul 2019 at 6:26pm
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TramwayGuy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TramwayGuy Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jul 2019 at 6:03pm
Intakes are larger, not exhaust.
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Dick L View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jul 2019 at 6:26pm
Originally posted by TramwayGuy TramwayGuy wrote:

Intakes are larger, not exhaust.


Sorry about that.
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2011dandd View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 2011dandd Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2019 at 1:40am
Thanks. As I thought.
Just double checking. Had my mag rebuilt and I’m struggling to ge it to fire. Carb not long rebuilt either. Fuel is getting through and there is a spark!
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Gerald J. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Gerald J. Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2019 at 9:51am
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2011dandd View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 2011dandd Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jul 2019 at 3:53pm
Gumming up fuel I think. Very quickly these days
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DaveKamp View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveKamp Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jul 2019 at 12:31am
Could be.  Do a simple test... Turn off the fuel, pull all the spark plugs, connect them to their respective wires, and place them away from the plug holes.  Turn the hand crank, and observe all plugs, verify that they're all firing.

Install ONE spark plug, thread it in about three-four turns by hand, install plug wire, and turn the crank.  Observe spark at all OTHER plugs... when you cross top center of compression stroke, make sure you don't see SOME OTHER plug fire.  if so, disconnect that plug's wire from distributor  cap, move it to the plug that's installed.  Remove this plug, insert next one, and repeat 'till you're out of plugs... and note that your mag should CLACK  just AFTER you've passed peak compression... not before, and not way after.  (if it's off by much, then there's something afoot in the mag's timing)

then turn on the fuel, spray a bit of starting fluid or spray oil into the carb throat... it should pop right on, at least for a couple cylinders, to let you know that it IS timed and wired right.
Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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