|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
06-19-2017, 08:30 AM | #21 |
Senior Member
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,560
|
Re: Knock, knock, knock sound
"POSSIBLY" loose flywheel bolts??? Pry on flywheel teeth & see if flywheel rotates back & forth about 1/8 Inch.
Bill Loose
__________________
"THE ASSISTANT GURU OF STUFF" |
06-19-2017, 08:35 AM | #22 |
Senior Member
Join Date: May 2010
Location: ca.
Posts: 2,522
|
Re: Knock, knock, knock sound
i would pull the pan , not run it more . check exhaust for leak . could a piston be hitting a valve or the head ? .............. good luck .
__________________
V4f |
Sponsored Links (Register now to hide all advertisements) |
|
06-19-2017, 08:42 AM | #23 |
Senior Member
Join Date: May 2010
Posts: 107
|
Re: Knock, knock, knock sound
With engine turn off pry gently on the crank pulley to see if moves back and forth
|
06-19-2017, 08:43 AM | #24 |
Senior Member
Join Date: May 2010
Location: La Mesa Ca
Posts: 1,157
|
Re: Knock, knock, knock sound
Please let us know what you find.
|
06-19-2017, 09:29 AM | #25 | |
Senior Member
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,011
|
Re: Knock, knock, knock sound
Quote:
__________________
If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn! |
|
06-19-2017, 09:29 AM | #26 |
Senior Member
Join Date: May 2010
Location: NC
Posts: 2,975
|
Re: Knock, knock, knock sound
Sponsored Links (Register now to hide all advertisements)
To me when some one says rebuilt I get real worried. |
06-19-2017, 01:17 PM | #27 |
Senior Member
Join Date: May 2010
Location: Pitt Meadows BC
Posts: 1,003
|
Re: Knock, knock, knock sound
I recently developed a knock on the 31 AA, fearing the center main was gone I started with the simple first. Pulled the belt still knocked. Checked with a stethoscope and found the noise throbbing in around the cam gear. Pulled the side cover a found the cam gear real loose, like a half inch wobble. This engine still ran!? Pulled the front cover and inspected the plunger and spring, all good there. Took the cam nut off the last four threads and washed the nut and cam off with Brake clean. Air dried them up and applied a little Blue Loc-tite. Screwed it back on and tightened it up. I hand cranked it over to find no missing or ruined teeth, so I just buttoned her up and took it for a lap. She's happy again!
|
06-19-2017, 01:28 PM | #28 |
Senior Member
Join Date: May 2010
Location: Oregon
Posts: 1,369
|
Re: Knock, knock, knock sound
This also happened to me once but the knock came and went with changes in engine speed. It would also change timing as the cam moved back and forth in the block. I had to retime the car every few miles to keep it running and later discovered the broken cam plunger spring as the culprit.
|
06-19-2017, 01:35 PM | #29 |
Senior Member
Join Date: May 2010
Posts: 2,579
|
Re: Knock, knock, knock sound
SINCE IT WAS JUST REBUILT.
I wonder if the Dipper tray pan has popped loose and the rods are striking it! MAYBE dipper tray was loose and not snapped all of the way into the grooves. At least it sounds that way to me!! Last edited by Benson; 06-19-2017 at 03:58 PM. |
06-19-2017, 02:53 PM | #30 |
Senior Member
Join Date: May 2010
Location: 60615,330th Ave.,Clare, Iowa, 50524
Posts: 1,457
|
Re: Knock, knock, knock sound
Sounds like first, or second rod to me.
Herm. |
06-19-2017, 03:02 PM | #31 |
Senior Member
Join Date: May 2010
Location: NorCal
Posts: 2,617
|
Re: Knock, knock, knock sound
I'm with the loose flywheel crowd
|
06-19-2017, 03:26 PM | #32 | |
Senior Member
Join Date: Feb 2011
Location: Wonderful Whitby Ontario
Posts: 131
|
Re: Knock, knock, knock sound
Quote:
https://vimeo.com/222254828 I guess Tomorrow the pan comes off as Im fearing the worst. As for rebuild. I was the one who basically took it all apart, cleaned everything and but her back together years ago in 2003. If it's time to do the ol girl right, it's time is now. Anyone want to come help? Michael |
|
06-19-2017, 03:42 PM | #33 |
Senior Member
Join Date: Jan 2012
Location: Phoenix, Oregon
Posts: 661
|
Re: Knock, knock, knock sound
The first video hurts to listen too.
__________________
Mike Stitt "A business that make nothing but money is a poor business." -Henry Ford |
06-19-2017, 07:28 PM | #34 |
Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
|
Re: Knock, knock, knock sound
Hopefully all the rod scoops have the opening facing the camshaft.
Guess we'll learn more tomorrow. |
06-20-2017, 04:33 PM | #35 |
Senior Member
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,560
|
Re: Knock, knock, knock sound
NOTE: A Model A piston can NOT hit a VALVE!
Bill Clearance
__________________
"THE ASSISTANT GURU OF STUFF" |
06-20-2017, 04:56 PM | #36 |
Senior Member
Join Date: May 2010
Location: Colorado
Posts: 235
|
Re: Knock, knock, knock sound
Our Vicky developed a similar sound. It is. Model A Engine with a Miller Overhead Valve Head.
The sound was more of a clicking sound, not a deep thud like a rod or main. I first thought it was the rockers not properly adjusted, that didn't work. Removed fan belt, no change, shorted out spark plugs, no change in the sound. I also used a stethoscope, but couldn't locate the source. It did seem noisier under the car, pan area. Lighter metal of the pan might have amplified the noise. I removed the engine, checking everything I could think of along the way. I found the problem to be a lose Timing Gear. The nut was backed off a couple of threads, and there was significant movement in all directions, as well as very worn. It was a fiber gear, being replaced with an aluminum gear. It is not back together yet, doing some other things while it is apart, but I'm sure this was the problem. |
06-20-2017, 05:32 PM | #37 |
Senior Member
Join Date: Feb 2011
Location: Wonderful Whitby Ontario
Posts: 131
|
Re: Knock, knock, knock sound
|
06-20-2017, 06:43 PM | #38 |
Senior Member
Join Date: Apr 2016
Location: Bellingham, WA
Posts: 1,163
|
Re: Knock, knock, knock sound
I'm wondering how that engine ran with 2+ teeth missing.
Is that the clicking sound heard in the video? Is the broken cam gear "the issue" or is it a result of the issue?
__________________
All steel from pedal to wheel |
06-20-2017, 06:59 PM | #39 |
Senior Member
Join Date: May 2010
Posts: 2,579
|
Re: Knock, knock, knock sound
With a all of fiber inside oil pan ... Do Not forget to clean out the oil pump filter screen inside the "cover" of oil pump!
|
06-20-2017, 07:15 PM | #40 | |
Senior Member
Join Date: Feb 2011
Location: Wonderful Whitby Ontario
Posts: 131
|
Re: Knock, knock, knock sound
Quote:
Michael |
|
Thread Tools | |
Display Modes | |
|
|
Sponsored Links (Register now to hide all advertisements) |
|