Topic: flat head has rod knock


rustedorrotting    -- 10-21-2019 @ 8:29 AM
  as some of you know i am trying to get my 41 1/2 ton road ready. i have learned some very hard lessons about fuel. my carb power valve was bad and leaking and end result was about 3 qts of gas in the oil. Now it has a rod knock. Do i have to pull the engine or can i access from underneath? I have the pan loose, but can't seem to get it off.


mfirth    -- 10-21-2019 @ 9:02 AM
  Howdy, even though you have the pan loose, did you try putting fresh oil in it?
Have heard of the same problem and fresh oil & filter solved the knock.....
Think you have to drop the tie rod to remove pan....others know much more than me.
Wish you well, mike


37RAGTOPMAN    -- 10-21-2019 @ 3:23 PM
  hi flathead rod knock
I would pull the pan and check the oil pump screen and see if is clogged ,
how is the oil pressure ?
before that,,,,
remove one spark plug wire one at a time [while running,] to locate which cylinder is making noise,
you can remove that connecting rod cap and check the rod journal for any damage,
it also might be a bad timing gear making a tapping noise, clicking noise,?
lets hear how you made out, 37 RAGTOPMAN



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