Briggs 16 hp. Is it worth salvaging?
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reynoldston
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Its been a some time since I did the job but as I remenber it seem that this engine uses push rods for the valves and not a overhead cam. Can't be any big job removeing the head. Even if a engine has a overhead cam you just have to keep track of the timeing marks, but nothing you have to worry about on this engine.
Berniebac
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Thanks guys. If as scott47429 pointed out, the cylinder and piston are good, then I will order the book that Rivets identified and see what it takes to put it back together. I will let you know what I find when I pull the head and will likely need some help with a list of parts that I will need.
Berniebac
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Re: Briggs 16 hp. Is it worth salvaging? Pics of Inside
I will post a couple times to get some pics of the head, piston, cylinder and the crankshaft. I don't know how many pics I can post in one message so I will break them up into two or three messages.
First, the head is off, connecting rod broken at crankshaft end.
Second, the same view with the piston turned over to show the end of the piston.
Once the head was off, I found a bunch of metal filings to the left of the intake valve. It doesn't show well in the pick because the filings and the head are all black and the flash did not light them up. The piston does not have a hole in it and the spark plug was not damage.
But, I do believe a lot of oil leaked out at the head gasket so I wonder if the piston drove forward and warped the head. Wonder how you can tell?
I will post a couple times to get some pics of the head, piston, cylinder and the crankshaft. I don't know how many pics I can post in one message so I will break them up into two or three messages.
First, the head is off, connecting rod broken at crankshaft end.
Second, the same view with the piston turned over to show the end of the piston.
Once the head was off, I found a bunch of metal filings to the left of the intake valve. It doesn't show well in the pick because the filings and the head are all black and the flash did not light them up. The piston does not have a hole in it and the spark plug was not damage.
But, I do believe a lot of oil leaked out at the head gasket so I wonder if the piston drove forward and warped the head. Wonder how you can tell?
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reynoldston
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If it was me I would of just pulled off the valve cover off or removed the spark plug before I ever pulled the engine out of the chassie and taken it all apart. Who knows maybe all it has is a bad valve push rod? I guess we will find out.
Berniebac
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Re: Briggs 16 hp. Is it worth salvaging? More Pics Inside.
The cylinder does not seem badly scored inspite of the filings I found on the head and the little bits of metal inside the cylinder. The little bits of metal seemed to follow along as the connecting rod was pulled out. I don't know how to tell if the cylinder is so badly scored to be good anymore. I can see the crosshatching inside the cylinder. I cannot feel any marks on the cylinder wall with my fingers, but we are probably talking thousands of an inch, so maybe you can't feel a bad score mark.
In the second photo you can see inside the engine to the crank, and you can see the crank is scored from the rod breaking off. Is this beyond repair and in need of replacement?
The cylinder does not seem badly scored inspite of the filings I found on the head and the little bits of metal inside the cylinder. The little bits of metal seemed to follow along as the connecting rod was pulled out. I don't know how to tell if the cylinder is so badly scored to be good anymore. I can see the crosshatching inside the cylinder. I cannot feel any marks on the cylinder wall with my fingers, but we are probably talking thousands of an inch, so maybe you can't feel a bad score mark.
In the second photo you can see inside the engine to the crank, and you can see the crank is scored from the rod breaking off. Is this beyond repair and in need of replacement?
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Berniebac
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Re: Briggs 16 hp. Is it worth salvaging? More Pics Inside.
Finally, a shot down the cylinder to the crankshaft and again you can see the marks that the rod left on the crank. It feels pretty rough, so I am betting replacement of the crank would be necessary. Your thoughts on that would be appreciated.
I know it is hard to judge from photos, but my original question remains. Is it worth trying to salvage this motor or is the damage beyond repair?
Finally, a shot down the cylinder to the crankshaft and again you can see the marks that the rod left on the crank. It feels pretty rough, so I am betting replacement of the crank would be necessary. Your thoughts on that would be appreciated.
I know it is hard to judge from photos, but my original question remains. Is it worth trying to salvage this motor or is the damage beyond repair?
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Berniebac
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Renoldston, you are probably correct, but I wouldn't have recognized that anyway. The tear down has been interesting and a learning experience. I have never been inside an engine before. So, imagine how I feel about rebuilding it. I think I can do it, but I don't know if it is worth it.
If my guess at what a push rod is, is correct, they both look exactly the same. I haven't taken the time to study the parts manual, but will if I decide to put it back together.
Look at it this way, if the engine isn't worth fixing, then you've gain valuable experience tearing down an engine. You will know what the inside looks like and will probably be able to figure out how it all goes back together. As a general rule, if you can drag your fingernails across any scratches in the cylinder an they don't "hang" on each scratch, then they can usually be honed out fairly easily. The crank probably is ruined, but only a closer look will tell you that. I say, if you can reuse the original crank or find another one fairly cheaply, then rebuild it and see what happens. :thumbsup:
reynoldston
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Some nice pictures. Keep track of your push rods so you don't mix them. From the looks of the crankshaft it looks like it was ran out of oil . From the looks of the picture the crank looks scored. This means the crankshaft will have to be replaced unless they make a oversize connecting rod and if this is the case you can have the crankshaft ground down. I don't think they make connecting rods for mower engines with rod bearing inserts but I would also look into it if I was you. What does the piston look like. The clyinder wall looks good.