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Messages - chetbrz

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1
General Discussion / Re: Anyone want to venture a guess.
« on: August 13, 2018, 10:56:54 PM »
Thanks for the input, When I pull the engine I'll check.  But ! There shouldn't be any wear the crank was machined and the engine has less then 5 minutes run time.

2
General Discussion / Re: Anyone want to venture a guess.
« on: August 13, 2018, 06:40:15 PM »
I have a great deal of confidence in the builder.  I should have never run the engine with the pressure plate in place.  My mistake.  The centrifugal force probably allow the arms to open slightly and grab the throw out bearing shaft.  After that.., it's history.  I couldn't blame the motor rebuilder for that.   

Stuff happens, now we have to focus on correcting the problem.  Chet...

3
General Discussion / Re: Anyone want to venture a guess.
« on: August 12, 2018, 09:04:19 PM »
Chet- listened to yur video quite a few times - I can hear the knock upon acceleration - I think it might be a rod or wrist pin - do you have a mechanics stethoscope?  If not they are very cheap and really can pinpoint a noise, even a vacuum leak.  Should be available at any auto store for 9-15 bucks.   

You are right on my friend.  I have 3 out of four connecting rod bearings making noise.  See attached link to video.
60 meg file so probably download before running it.

http://www.1948plymouth.info/1929/images/IMG_1261.MOV

Will solution with builder, I believe you can remove shims to tighten the bearings.

4
General Discussion / Re: Anyone want to venture a guess.
« on: August 12, 2018, 05:34:32 PM »
Thanks Rich for the info.

After the last gap settings the engine ran very smooth except for the knocking.  To eliminate all problems with the gap setting I tightened the gaps again today which didn't affect the clunking.   At this point I am convinced the sound is coming from the rear of the crankcase.   Maybe something broke when the engine chewed up the pressure plate.  I am dropping the oil pan to get a look see.

I used a long screwdriver to listen to the block vibrations.  Starter motor bell housing OK, Distributor base OK, even the area around the tappets was soft.  No bangs coming from the oil pump.  Sound definitely coming from the rear and below the valves.

Manny thanks for your suggestion,  Chet...

5
General Discussion / Re: Anyone want to venture a guess.
« on: August 11, 2018, 11:57:53 PM »
I spoke with the builder and he said lifter noise.

So...

I will redo the gaps.  I am going to go on the tight side just to see if the noise goes away.  Then after a little run time I can recheck them and loosen if needed. 

Its harder working on a rebuilt engine.  With an old engine you don't really worry about breaking it because it is already broken.., that's why you are working on it.  Not the same after a rebuild.  It's like getting a car back from the painter and you are afraid to touch it until it gets its first ding.

As always, let me know what you think,  Chet...

6
General Discussion / Re: Anyone want to venture a guess.
« on: August 11, 2018, 08:31:42 PM »
Knock still there.  Maybe a little better ?   :(

Below is a link to a video of the engine running.  Its around 38meg so it will take a couple of minutes to load.

BTW... The noise goes away on acceleration and returns with stable engine speed.  Sounds like a marble bouncing around the crank case ??  I guess I should drop the oil pan and check things out ?  Does anyone think I could have damaged something when the pressure plate got chewed up.  Why disappear on acceleration and return on idle.  Does it sound like valve click to you ?

http://www.1948plymouth.info/1929/images/IMG_3987.MOV

Chet...

7
General Discussion / REPOST from AACA Forum
« on: August 09, 2018, 11:35:14 PM »
Reposted from AACA Forum
I purchased 2 clutch/pressure plates from him - surface rust but good restorable shape.
Chet...
_________________________________________

I have the left overs of a 1928 Plymouth 4dr sedan that all the wood had rot out & the body fell apart .. We've all seen it. The body panels of this car found a Man who tack welded it together & put it in his Garden.  I have 1 Rear Fender & a few bits of small tin available along with a Trailer load of Small parts, Just about anything you need it Seems.

Chassis Parts, NICE Frame, Front Axle & springs, 2 sets of Bumpers, 2 SILVER DOME 4cyl engines, 1 other that's not marked silver dome.

Bell housings, Transmissions, clutch parts, Fly wheels … Bits & pieces .. BOXS of them ….

I'll sell the whole trailer load or just 1 part …. If you have a weird small part like body brace or a small part, It would help us both if you supply a PICTURE of the part your after …. I'm no Plymouth expert

Contact me by TEXT or EMAIL ………… 805-746-9011 Rick or desoto6x2@aol.com





8
General Discussion / Re: Pressure Plate Located
« on: August 09, 2018, 10:30:08 PM »

I purchased a new bearing from Hagen's see link below:  ($84.25)

https://hagensautoparts.com/plymouth/13-clutch-flywheel/31123

Probably find a cheaper replacement now that I have a sample to send to someone.

9
General Discussion / Re: Pressure Plate Located
« on: August 09, 2018, 05:34:52 PM »
Thanks Dave,

The pictures were very informative.  I removed the bearing but had to use a bearing puller for the first 1/2 inch. 

Did you ever source the bearing ?  I need to replace mine I don't want to take any chances with that section coming apart.  The destruction of the first pressure plate was enough for me.  Hooked up to the transmission under power and doing 35mph could have been a very destructive event.

I found a source but a little pricey.

Many thanks Chet...

10
General Discussion / Re: Pressure Plate Located
« on: August 09, 2018, 05:39:03 AM »
Could also try these guys. If it exists they can find it. I used them to get replacement axle bearings and a replacement for the front hub. they also have replacement seals of all kinds. 

https://www.cutter-sales.com/

Dave,

I think you replaced the throw-out bearing on your car.  See picture below is the bearing pressed on the plate with the transmission locating post or did you find a similar bearing ?



Tks, Chet...

11
General Discussion / Re: Anyone want to venture a guess.
« on: August 09, 2018, 04:33:26 AM »
Chet_ glad u got it worked out - I was thinking towards a binding or broken valve spring as based on your description of the noise in relation to cam revolution.....

Don’t know for sure but we will see when I fire it up again.  Fingers crossed.

12
General Discussion / Re: Anyone want to venture a guess.
« on: August 08, 2018, 08:28:12 PM »
Tom,

The Plymouth Instruction Book May, 1929 (page25) states:

Cold Setting for intake & exhaust is 0.008.  Hot setting is 0.006 for exhaust and 0.004 for intake.  The book states that these settings are necessary for quiet valve operation.  I set to 0.007 cold because the valves are stainless steel and may expand at a slightly greater rate than the original carbon steel.  Once the engine is broken in I will recheck and reset the gaps depending on noise level.  The builder set them at 0.010 - 0.012.., he wasn't aware of the 0.006 - 0.004 setting recommendation from the old text.

Maybe fire it up tomorrow, must cut grass again  :(

13
General Discussion / Re: Anyone want to venture a guess.
« on: August 08, 2018, 06:42:02 PM »

I set all the valve gaps for 0.007 (go) &  0.008 (no go)

It appears like the metallic click is gone ?  See link below:

http://www.1948plymouth.info/1929/images/IMG_1254.MOV

I also removed the starter motor to check the rear of the flywheel for any signs of rubbing.  It checked out OK.

I guess I'll try running it again and see how it goes.  I'll keep you all posted...


14
General Discussion / Re: Anyone want to venture a guess.
« on: August 08, 2018, 02:55:27 PM »
Good questions and suggestions,

Yes the engine ran fine prior to the rebuild except for a knock when driving above 35mph and using/leaking a quart of oil every 50 miles.   Also every now and again the engine would sputter.  A little miss or cough. Not really a problem and I believe it is caused by the home made distributor housing that is installed on my engine.   Functional but now exactly precision. 

Rich, I don't believe the housing is connected to the noise but I do have one on order from Then & Now Auto Parts.  Also I heard the clunk prior to installing my old housing.

I'm going to redo the valve adjustment today before it gets to hot outside.  Between the rain and heat it seems that I have to cut the grass every three days.  Just an extra added attraction to highlight the summer.

To add insult to injury my under ground electric line to my work shop shorted out.  So no power to the work shop.

I think I'll hold off buying any lottery tickets, doesn't seem to be the right time.

15
General Discussion / Re: Anyone want to venture a guess.
« on: August 08, 2018, 12:33:48 AM »
Tom,

It's the clunk with each revolution of the cam shaft.  It happens twice per revolution of the crank.  Actually once with every movement of the third valve from the left in the video.  Vacuum jumps down from 21 to 19 on the vacuum gauge with each clunk.

I think the valve gaps are too great.  He set them loose (.010 / .012) and I think that causes the cam shaft to transition harder across a single revolution due to the necessary backlash in the timing gears.  Tightening the gap I believe softens the transition across the cam lobe pattern.  You can feel this as you hand crank the motor.  It's like a slight tug left in half a turn then right.  You can feel the crank resist then relax.  PS... No spark plugs in the engine so no compression causing the sound or the resistance. 

I also believe that the lobe pattern of the cam shaft's design is very dependent on this gap setting to smooth out the movement of the cam shaft through one cycle.  When the gap is slightly off due to the setting or wear, possibly expansion from heat (changing the gap) I believe this is what causes the occasional engine sputter.

We will see...

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