BinderPlanet.com

Welcome to BinderPlanet.com the World's Premier IH Website.

Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!

304 knocking

2024 Arizona International Harvester Rendezvous

Help me find this horrible knocking

  • 1

    Votes: 0 0.0%
  • 2

    Votes: 1 100.0%

  • Total voters
    1

Bryan hill

Farmall Cub
Joined
Sep 1, 2019
Messages
7
Points
3
1968 travelall hasn't run for a minimum of 15 years.
Has knock, not tick at idle ( Cold and warm) increasing in intensity with throttle position. Runs really smooth great power , for 1968
Got new clean fuel, mechanical pump blocked. Running electric FP.
Pulled valve covers, rockers all move equally and are getting oil. All but 3 rotate during their travel but not all equally. Oil pressure appears good(on stock dash gauge). Old oil came out good , no chunks or particles, just dark. Sound of knock does not change without covers on.
Alt,PS pump,water pump sound great thru stethoscope.
Any ideas????
 

Peter Albrecht

Farmall Cub
Joined
Mar 6, 2005
Messages
286
Points
28
Location
Wildomar, Ca.
If the knock is on the passenger side, it could be the valve that runs the exhaust through the intake manifold on cold starts. There is a butterfly valve that is spot welded to a shaft, that weld has failed on two of those units over the years and the round plate rattling around will make a knocking sound which would initially make you think " Oh $#!+, a rod knock !" That unit is located on the passenger side of the engine, between the exhaust manifold and down pipe. The down pipe is flared with a larger opening at the top so the round plate will not fall down into the pipe.
 

Bryan hill

Farmall Cub
Joined
Sep 1, 2019
Messages
7
Points
3
If the knock is on the passenger side, it could be the valve that runs the exhaust through the intake manifold on cold starts. There is a butterfly valve that is spot welded to a shaft, that weld has failed on two of those units over the years and the round plate rattling around will make a knocking sound which would initially make you think " Oh $#!+, a rod knock !" That unit is located on the passenger side of the engine, between the exhaust manifold and down pipe. The down pipe is flared with a larger opening at the top so the round plate will not fall down into the pipe.
I've seen your earlier post on this subject, heat riser turns free and definitely stops in open and closed position so I figured the disc was in position, I've got it temporarily wired open because its warm out and don't know the condition of the passages in the manifold.
I'll put a stethoscope on it today.
 

stroker3

Lives in an IH Dealership
Joined
Feb 5, 2009
Messages
9,706
Points
113
Location
Mass.
Got fresh 5-40 synthetic in it now .
Wix filter


(No need to start another oil debate.) Big fan of synthetic. Not so much in an old engine. It may be worth your time to search threads on oils that could/should be used in these old engines. There's been a bunch here.
 

sdhachey

Binder Driver
Joined
Apr 15, 2003
Messages
925
Points
63
Location
Fitchburg, MA
Check the timing. Consider dropping the oil pan to mine for bearing fragments, make sure oil pump stuff is tight. I have a good running 1968 304 for sale but I hope it doesn't come to that... and I can't tell where you're located.
 

72soa

High Wheeler
Joined
Oct 23, 2003
Messages
1,263
Points
83
Location
Oak Hill, FL
Could be your fuel pump. I would just drive. What type of oil pressure does the engine have? Engine vacuum? I have disconnected the accessories - alt. power steering pump - and run engines before to isolate noise. If it has power and good vitals it should be ok.
 

jeff campbell

Moderator
Staff member
Joined
Jan 8, 2003
Messages
24,220
Points
113
Location
lima,ohio
Check the timing. Consider dropping the oil pan to mine for bearing fragments, make sure oil pump stuff is tight. I have a good running 1968 304 for sale but I hope it doesn't come to that... and I can't tell where you're located.
Mn
 

kdsmit

High Wheeler
Joined
Apr 7, 2015
Messages
1,269
Points
113
Location
Delton,MI
Does it have an auto trans? A friend and I bought a nice car for 75 bucks, because the owner was sure it had a rod knock. We pulled the transmission and found that the center of the flywheel was completely broken away from the outside of the flywheel. As it wore, it started to sound just like a rod knock.
 

RinTX

Dreams of Cub Cadets
Joined
Jan 19, 2013
Messages
4,590
Points
113
Location
Ft Worth, TX
One thing - not the source of your knock but you are running the wrong oil for these old engines.
Try your stethoscope in the vicinity of your fuel pump.
 
2024 Arizona International Harvester Rendezvous
Friends of BinderPlanet Facebook Group
Top