The Ford Barn

BirchRidge · 07-19-2017, 08:00 PM

Pulled the pan tonight and found some babbitt in the oil so I checked the bearings and found this.. How bad is it? Is it over or usable?

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BirchRidge · 07-19-2017, 08:01 PM

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BirchRidge · 07-19-2017, 08:02 PM

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Chuck Sea/Tac · 07-19-2017, 09:44 PM

Is that rod centered on the crank ? Possibly more important how much thrust movement do you have on the crank. ( fore and aft)

Russ/40 · 07-19-2017, 10:35 PM

Just my opinion, but if it was mine id put it back and forget I ever saw it.

J Franklin · 07-20-2017, 12:36 AM

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JB-WELD and then check to see how the bearing sits while someone turns the engine over, could have a crooked rod or thrust problem as mentioned. I would use it until it no longer works

Synchro909 · 07-20-2017, 01:35 AM

Someone who does Babbit could "dabble" a bit on the sides of that con rod (like soldering, only with Babbit) and adjust the width of the big end to fit the journal. I would do that and keep driving.

BirchRidge · 07-20-2017, 05:58 AM

Ok, thanks guys.. I will check the rest of the bearings today and see what it looks like.
How much crack endplay is ok?

WHN · 07-20-2017, 06:06 AM

How did the engine sound and run prior to finding this?

If you had no idea that anything was wrong, I would do as mentioned above.

Put it back together and enjoy. Might recommend using 20-50w oil.

Model A's run forever.

BirchRidge · 07-20-2017, 06:20 AM

The reason I pulled the pan was a knock that I tought was a main bearing since it match this troubleshooting guide http://www.foxvalleymarc.com/Tech_se...ne_noises.html

WHN · 07-20-2017, 06:26 AM

Were you hearing the knock all the time.

When spark was fully retarded?

Lugging or pulling up a hill?

Going down a hill under no load?

BirchRidge · 07-20-2017, 06:44 AM

It is a "B" engine and dist so I can't retard the spark
It only knocks at normal speed nothing on idle or accelerating

WHN · 07-20-2017, 07:02 AM

Some people will question what I am now going to recommend.

If everything else looks good underneath, put it back together.

Use 20-50w oil and add a bottle of STP oil treatment. The STP will help on the flat tapped, and any worn surfaces. Giving the engine some cushion. I also always recommend Marvel Mystery Oil in gas only, helps with valve noise.

I am an old guy that does not like to fix things that don't need fixing.

I have seen and also owned Model A's that knocked. There are cases where Shake Oil will help. If this does not help with the knock, than you can cross that bridge.

Railcarmover · 07-20-2017, 07:56 AM

^^^agree^^^,the missing babbit isn't in the thrust area,however the thrust area witness mark indicate a slight misalignment of the rod/rod cap to journal,which could be a number of things,but not worth worrying about..run it,and look for the 'thump' elsewhere.

BirchRidge · 07-20-2017, 09:23 AM

Ok, I will check clearence on all bearings again and then start it up and see what happens
Thanks for the advice and answers

Tom Wesenberg · 07-20-2017, 09:32 AM

I agree with # 13 and 14, except as long as the rod is out I'd have it checked for straightness.
As mentioned, the engine had a slight knock and the witness mark on the babbit looks like a slightly bent rod.

Flathead · 07-20-2017, 05:10 PM

Check the center main?

BirchRidge · 07-21-2017, 04:53 PM

I will check all the mains and rods and report back how it turns out

Fred K-OR · 09-04-2017, 04:38 PM

BirchRidge, did you find out where your knock came from yet? Reason I asked is that I have similar problem.

07-19-2017, 08:00 PM	#1
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Rod bearings Pulled the pan tonight and found some babbitt in the oil so I checked the bearings and found this.. How bad is it? Is it over or usable? [/IMG]

07-19-2017, 08:01 PM	#2
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Re: Rod bearings [IMG][/IMG]

07-19-2017, 08:02 PM	#3
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Re: Rod bearings [IMG][/IMG]

07-19-2017, 09:44 PM	#4
Chuck Sea/Tac Senior Member Join Date: May 2010 Location: Between Seattle & Tacoma Posts: 2,411	Re: Rod bearings Is that rod centered on the crank ? Possibly more important how much thrust movement do you have on the crank. ( fore and aft)

07-19-2017, 10:35 PM	#5
Russ/40 Senior Member Join Date: May 2010 Location: Santee, California Posts: 3,505	Re: Rod bearings Just my opinion, but if it was mine id put it back and forget I ever saw it.

07-20-2017, 12:36 AM	#6
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 6,373	Re: Rod bearings Sponsored Links (Register now to hide all advertisements) JB-WELD and then check to see how the bearing sits while someone turns the engine over, could have a crooked rod or thrust problem as mentioned. I would use it until it no longer works

07-20-2017, 01:35 AM	#7
Synchro909 Senior Member Join Date: Jun 2014 Location: Melbourne, Australia Posts: 8,044	Re: Rod bearings Someone who does Babbit could "dabble" a bit on the sides of that con rod (like soldering, only with Babbit) and adjust the width of the big end to fit the journal. I would do that and keep driving. __________________ I sometimes wonder what happened to the people who asked me for directions. Even at my age, I still like to look at a young, attractive woman but I can't really remember why.

07-20-2017, 05:58 AM	#8
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Re: Rod bearings Ok, thanks guys.. I will check the rest of the bearings today and see what it looks like. How much crack endplay is ok?

07-20-2017, 06:06 AM	#9
WHN Senior Member Join Date: Mar 2017 Location: Connecticut Shoreline Posts: 1,977	Re: Rod bearings How did the engine sound and run prior to finding this? If you had no idea that anything was wrong, I would do as mentioned above. Put it back together and enjoy. Might recommend using 20-50w oil. Model A's run forever.

07-20-2017, 06:20 AM	#10
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Re: Rod bearings The reason I pulled the pan was a knock that I tought was a main bearing since it match this troubleshooting guide http://www.foxvalleymarc.com/Tech_se...ne_noises.html

07-20-2017, 06:26 AM	#11
WHN Senior Member Join Date: Mar 2017 Location: Connecticut Shoreline Posts: 1,977	Re: Rod bearings Were you hearing the knock all the time. When spark was fully retarded? Lugging or pulling up a hill? Going down a hill under no load?

07-20-2017, 06:44 AM	#12
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Re: Rod bearings It is a "B" engine and dist so I can't retard the spark It only knocks at normal speed nothing on idle or accelerating

07-20-2017, 07:02 AM	#13
WHN Senior Member Join Date: Mar 2017 Location: Connecticut Shoreline Posts: 1,977	Re: Rod bearings Some people will question what I am now going to recommend. If everything else looks good underneath, put it back together. Use 20-50w oil and add a bottle of STP oil treatment. The STP will help on the flat tapped, and any worn surfaces. Giving the engine some cushion. I also always recommend Marvel Mystery Oil in gas only, helps with valve noise. I am an old guy that does not like to fix things that don't need fixing. I have seen and also owned Model A's that knocked. There are cases where Shake Oil will help. If this does not help with the knock, than you can cross that bridge. Last edited by WHN; 07-20-2017 at 07:36 AM.

07-20-2017, 07:56 AM	#14
Railcarmover BANNED Join Date: Apr 2017 Location: Sacramento Posts: 1,262	Re: Rod bearings ^^^agree^^^,the missing babbit isn't in the thrust area,however the thrust area witness mark indicate a slight misalignment of the rod/rod cap to journal,which could be a number of things,but not worth worrying about..run it,and look for the 'thump' elsewhere.

07-20-2017, 09:23 AM	#15
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Re: Rod bearings Ok, I will check clearence on all bearings again and then start it up and see what happens Thanks for the advice and answers

07-20-2017, 09:32 AM	#16
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Rod bearings I agree with # 13 and 14, except as long as the rod is out I'd have it checked for straightness. As mentioned, the engine had a slight knock and the witness mark on the babbit looks like a slightly bent rod.

07-20-2017, 05:10 PM	#17
Flathead Senior Member Join Date: May 2010 Location: Southern Maine Posts: 1,617	Re: Rod bearings Check the center main?

07-21-2017, 04:53 PM	#18
BirchRidge Member Join Date: Feb 2015 Location: sweden Posts: 35	Re: Rod bearings I will check all the mains and rods and report back how it turns out

09-04-2017, 04:38 PM	#19
Fred K-OR Senior Member Join Date: May 2010 Location: Stayton, Oregon Posts: 3,806	Re: Rod bearings BirchRidge, did you find out where your knock came from yet? Reason I asked is that I have similar problem. __________________ Fred Kroon 1929 Std Coupe 1929 Huckster