The Ford Barn

47 flatbed · 10-22-2011, 08:29 AM

Last night after work I heard the start of this rythmic knocking sound. Not a massive noise but more like maybe a water pump I hope. I've never heard a waterpump go dont know what I should be listening for. To many knocks in a row to be a componet of crank rods etc. I have all new bearings when we rebuilt motor. Noise sounds like it may be up front or top half of motor. I guess she just want to be in the garage the rest of the fall. Thanks everyone again what a rough introductions into flatheads

Planojc · 10-22-2011, 08:34 AM

Pull each spark plug wire, one at a time and see of the knock goes away.

Brendan · 10-22-2011, 08:36 AM

also take the fan belt off, you have had a hard time with motor, please don't give up i hope you get it irned out soon!

47 flatbed · 10-22-2011, 08:42 AM

Thanks for some useful help info. I love this sound of the flathead and I'm as stubborn as an ox when I like something. I just hope its easy and can enjoy the rest of the fall before winter hits

TomO · 10-22-2011, 01:01 PM

Use a long screwdriver as a stethoscope to isolate the noise. Check around the fuel pump, the newer pumps are noisy.

alanwoodieman · 10-22-2011, 01:07 PM

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did you use adjustable lifters? I have a 51 Merc with an old set of Johnson adjustable lifters and one "self" adjusted itself, finally had to stake the lifter screw after adjusting it for the second time and it has been alright since then

fordscript · 10-22-2011, 03:42 PM

Could be the armature in the generator hitting the 'poles'. Put your hand on the generator when it is making this noise....you will feel it. When water pumps make a noise, you can 'fix' this with a good squirt of WD 40 or similiar when the engine is running. Use the thin tube so you get right into the pump.

10-22-2011, 08:29 AM	#1
47 flatbed Senior Member Join Date: Feb 2011 Location: Ohio Posts: 419	knocking noise Last night after work I heard the start of this rythmic knocking sound. Not a massive noise but more like maybe a water pump I hope. I've never heard a waterpump go dont know what I should be listening for. To many knocks in a row to be a componet of crank rods etc. I have all new bearings when we rebuilt motor. Noise sounds like it may be up front or top half of motor. I guess she just want to be in the garage the rest of the fall. Thanks everyone again what a rough introductions into flatheads

10-22-2011, 08:34 AM	#2
Planojc Senior Member Join Date: May 2010 Location: Plano, Texas Posts: 847	Re: knocking noise Pull each spark plug wire, one at a time and see of the knock goes away.

10-22-2011, 08:36 AM	#3
Brendan Senior Member Join Date: May 2010 Location: At my kitchen table in Santa Rosa, Ca Posts: 2,903	Re: knocking noise also take the fan belt off, you have had a hard time with motor, please don't give up i hope you get it irned out soon! __________________ If it would have been a snake it would have bit ya! i can't spell my way out of a paper bag!

10-22-2011, 08:42 AM	#4
47 flatbed Senior Member Join Date: Feb 2011 Location: Ohio Posts: 419	Re: knocking noise Thanks for some useful help info. I love this sound of the flathead and I'm as stubborn as an ox when I like something. I just hope its easy and can enjoy the rest of the fall before winter hits

10-22-2011, 01:01 PM	#5
TomO Senior Member Join Date: May 2010 Posts: 362	Re: knocking noise Use a long screwdriver as a stethoscope to isolate the noise. Check around the fuel pump, the newer pumps are noisy. __________________ TomO

10-22-2011, 01:07 PM	#6
alanwoodieman Senior Member Join Date: May 2010 Location: upstate SC Posts: 2,964	Re: knocking noise Sponsored Links (Register now to hide all advertisements) did you use adjustable lifters? I have a 51 Merc with an old set of Johnson adjustable lifters and one "self" adjusted itself, finally had to stake the lifter screw after adjusting it for the second time and it has been alright since then

10-22-2011, 03:42 PM	#7
fordscript Senior Member Join Date: May 2010 Location: Oamaru, New Zealand Posts: 419	Re: knocking noise Could be the armature in the generator hitting the 'poles'. Put your hand on the generator when it is making this noise....you will feel it. When water pumps make a noise, you can 'fix' this with a good squirt of WD 40 or similiar when the engine is running. Use the thin tube so you get right into the pump.