16 hp Briggs Pistons

[DanD 9]

I have a question about pistons for the 326431 Briggs. Just a couple of years ago, Briggs had available .010, .020, .030, and .040 oversize pistons for this engine. When I rebuilt mine, the shop bored it out .010, but told me they had bored it .020. I had bought the .020 piston and it of course wouldn't fit in the cylinder when I brought the block home. So, when I took the block back, he just bored it out to .020 instead of telling me it was actually just .010(I would have bought the .010 piston if I had known it was actually just bored out .010). I thought, no problem...if it ever needs to be done again, I can still buy .030 and .040 pistons. But, they aren't available any more. Is there any saving an old block that's good except that it's already been bored out .020? Just curious..might come across this problem with another engine.

[PeppyDan 3]

The block could be sleeved. Some engine re-builders in my area say the engine is better to be sleeved than bored. By sleeving it you can continue to rebuild it back to a stock bore. Dan

[ehertzfeld 1]

I don't know, but I'm still waiting for my rings for mine, going on a months now.:( They keep telling me it's been backordered. I know it doesn't help you, but it made me feel better venting!:D

[BLT 725]

quote:

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Originally posted by ehertzfeld
I don't know, but I'm still waiting for my rings for mine, going on a months now.:( They keep telling me it's been backordered. I know it doesn't help you, but it made me feel better venting!:D

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Elon if you know P/N, go online to Sears parts system.

[Chris727 2,136]

I don't think Briggs ever had a .040 piston. Its not in the manuals, even the ones printed in the 70's. 030 is the biggest you could have gone on a briggs or the cylinder walls get too thin. Gravely and tecumseh had offered the bigger sizes for some of the engines they built. I would keep looking, just because one place says you can't get it doesn't mean that there isn't one sitting on a shelf somewhere. Check ebay, and you might also look to see if Stens or Prime Line aftermarket parts offer that size piston.

[DanD 9]

quote:

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Originally posted by PeppyDan
The block could be sleeved. Some engine re-builders in my area say the engine is better to be sleeved than bored. By sleeving it you can continue to rebuild it back to a stock bore. Dan

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How exactly is that done on these engines? WHat hold it in place? Do they put a step in the top of the block to keep it from going down and then the head keeps it from coming up? What is an average cost for this? Thanks in advance.

[richp 0]

It's a tight fit, The one's I have seen, they freeze the sleeve and heat the block. I think they use A type of locktite or sealer to help it stay put. The tough ones are the two strokes, where you have to line up the ports as your pressing it in.

[PeppyDan 3]

Thanks for answering that for me Rich, I didn't know exactly how they did it but knew it was done at least on the Kohlers. I also don't know the price, sorry I can't be of more help! Dan

[Paul_B 0]

When I checked on having a Hemi block sleeved, it was 100 bucks a hole a few years back at a local machine shop. To do the sleeve they typically overbore the cylinder 0.100" and then press in the sleeve.