briggs engine valve seat

55 50 Ron · Jun 9, 2015

photo is of the intake valve seat on an "L" head Briggs on a lawn mower. Is this economical to fix if I do it myself?

Briggs wants 22.95 for the repair manual. I am thinking of tearing into it without the repair manual.

Have any of you repaired this type of problem on one of these engines and what do you recommend?

Thanks Ron

old · Jun 9, 2015

Seen that before and put the seat back in place then used a punch to peen it in and held for I do not know how long since I sold that mower years ago

Pete in MD · Jun 9, 2015

I agree with old. I did that on a twin cylinder Briggs using a center punch. Don't be shy about hitting the punch.

David G · Jun 9, 2015

How many places do you peen it at?

old · Jun 9, 2015

Don't remember that was at least 10 years ago but if I had to guess 6-8 places

David G · Jun 9, 2015

thanks

old · Jun 9, 2015

I learned that from a guy in town who just this past winter closed down his lawn mower shop. I know his shop has or had been here for 34 years since it was here back in 1980 when I moved here

Wayne in MN · Jun 9, 2015

More is better.

60 acre hillside · Jun 9, 2015

I have seen that done on old flat head Ford V8

ed will · Jun 9, 2015

Hi, idid that on a bearing on wiper motor on chev pu.
the noise was quite annoying. The center punching
all around bearing tightened in place good. I would
go 1 side then the other all around. I punched about 3/16
in apart. Sould work fine. Ed will

Jim in MN · Jun 9, 2015

Had one of our kart racing engines do that one night. Popped the head off, pushed the seat back in to the bore, staked it in with a hammer and screwdriver, and sent the kid out for the feature race.

We put a lot of races on that engine afterwards but the seat never came loose again.

tractorguy2 · Jun 9, 2015

That was a very common problem on the L head Briggs. I used loctite and the punch like the others have already mentioned.

You will want to check your cooling fins. Make sure they are not full or grass, dirt, or grease. Running too hot makes the aluminum expand too much and lets the seat fall out.

GregCO · Jun 9, 2015

I'm with the rest here. Put it back in the bore and peen it in there. I used to work on allot of old Corvair's and the 140 engine was famous for dropping seats. Fixed them the same way. Lasted as long as the rest of the engine.

Greg

notjustair · Jun 9, 2015

I honestly had to look twice to make sure that wasn't a picture of mine that I took about six months ago! Mine is in a 20 horse flat head twin. I put it back in and peened all the way around it with a center punch and hammer. I may have gone overkill, but I staked it about every hour on the clock (one at 12, one at 1, one at 2, etc) so I had at least 12 total. That thing is never coming loose.

I use it twice a week for about 5 hours at full tilt. She runs like a champ. The worst part was getting the valves out to adjust them. I made my own spring compressor from a tie rod fork with a washer welded on it (with a notch cut out).

briggs engine valve seat

55 50 Ron

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old

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Pete in MD

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David G

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old

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David G

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old

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Wayne in MN

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60 acre hillside

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