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Pop in exhaust manifold
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Pop in exhaust manifold
Just rebuilt my 1949 Farmall cub, tried starting and it would smoke out of the exhaust followed by a very loud bang( I'll try to post video below) any ideas on what would cause this? And what to do to fix this? Thanks everyone!!
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Re: Pop in exhaust manifold
Explain "bang". Was it a mechanical noise a backfire or what?
1929 Farmall Regular
1935 John Deere B
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1953 Farmall Cub
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Re: Pop in exhaust manifold
Your timing may be 180 out.
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.
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Re: Pop in exhaust manifold
It wasn't anything mechanical, It sounded more like a backfire, unfortunately it won't let me upload the video. If it's timing how do I fix that? Thanks guys!
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Re: Pop in exhaust manifold
mag or distributor? I have one with dist,,i never care how things line up. Put it on #1 tdc and start with wires wherever the rotor points. With mag, take it out, turn it 180 and put it back in,,,static time it (see youtube).
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Re: Pop in exhaust manifold
It has a mag, I'll check YouTube for timing, thanks!
- Glen
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Re: Pop in exhaust manifold
Hi,
Here are pages from the 1949 Cub owner's manual telling about the magneto. The 1st page shows how to replace the points. The 3rd page tells how to time it.
http://farmallcub.com/rudi_cub/www.clea ... age-30.jpg
http://farmallcub.com/rudi_cub/www.clea ... age-31.jpg
http://farmallcub.com/rudi_cub/www.clea ... age-32.jpg
Here are pages from the 1949 Cub owner's manual telling about the magneto. The 1st page shows how to replace the points. The 3rd page tells how to time it.
http://farmallcub.com/rudi_cub/www.clea ... age-30.jpg
http://farmallcub.com/rudi_cub/www.clea ... age-31.jpg
http://farmallcub.com/rudi_cub/www.clea ... age-32.jpg
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Re: Pop in exhaust manifold
Thanks! I timed it just like they said in instructions, don't hear the pop noise when starting but now I can't get engine to turnover to fully start. Any suggestions? Thanks!
- Slim140
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Re: Pop in exhaust manifold
Timing may still be off the other way now. If you just rebuilt it and your sure the timing is right you may have to pull start it the first time, if it's to tight, I would only do that as a LAST resort though.
Every home is a school, what are you teaching?
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Re: Pop in exhaust manifold
If it has a mag. I would crank it before trying to pull start.
Double chk the firing order, it should be 1 at top followed by 3, 4, and 2 going clockwise around the cap.
Double chk the firing order, it should be 1 at top followed by 3, 4, and 2 going clockwise around the cap.
Why is there never enough time to do the job right, but always enough time to do it over.
- AL Farmall Boy
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Re: Pop in exhaust manifold
Please post some good pictures of the tractor, the engine, the distributor/mag, etc. We will have it going in no time!
To me, sounds like its out of time, and now probably a weak battery
To me, sounds like its out of time, and now probably a weak battery
Regards,
Chase
205-368-5339
ihfarmallrtr@gmail.com
Follow my page "Alabama Tractor Pickers" on YouTube & Facebook!
Chase
205-368-5339
ihfarmallrtr@gmail.com
Follow my page "Alabama Tractor Pickers" on YouTube & Facebook!
- Glen
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Re: Pop in exhaust manifold
Hi,
Charge the battery if it is low, or it won't crank the engine as fast as it should. After you get it to run, you should check the timing with a timing light to be sure it is right.
Charge the battery if it is low, or it won't crank the engine as fast as it should. After you get it to run, you should check the timing with a timing light to be sure it is right.
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Re: Pop in exhaust manifold
Did you use plastic gauge on the bearings to check all the clearances? One mix up on the bearing size could make the engine tighter than it could be.
I had a head mechanic at a dealership tell me they don't use plastic gauge. I assembled the engine and sealed the oil pan good. I knew it was too tight but I kept my mouth shut. The guy was a jerk. The bearings weren't in a box they were all loose little boxes. This told me he mixed and matched them. Of course the wrong size could be in the wrong box. There's never time to do it right, but always time do it over.
I had a head mechanic at a dealership tell me they don't use plastic gauge. I assembled the engine and sealed the oil pan good. I knew it was too tight but I kept my mouth shut. The guy was a jerk. The bearings weren't in a box they were all loose little boxes. This told me he mixed and matched them. Of course the wrong size could be in the wrong box. There's never time to do it right, but always time do it over.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.
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