262xp R&D

[Canadian farm boy]

Now what do I do for a gasket?

I'd be looking for something about .012" thick. Maybe check how thick a greeting card or a cereal box is.
@paragonbuilder how thick was the roof flashing you used?

 

[Canadian farm boy]

Oh and remember that when using paper from something like a greeting card that it will compress a couple thou when the cylinder is tightened down.

 

[paragonbuilder]

I'd be looking for something about .012" thick. Maybe check how thick a greeting card or a cereal box is.
@paragonbuilder how thick was the roof flashing you used?

Careful trusting that .005ish reading. When crushing solder that much it's usually less. What I would do now is glue sand paper to an old piston and sand the squish to where I wanted it. Gain a little exhaust that way. If you need sand paper with adhesive on it I have s roll and will send you some Dan.

 

[Canadian farm boy]

Careful trusting that .005ish reading. When crushing solder that much it's usually less. What I would do now is glue sand paper to an old piston and sand the squish to where I wanted it. Gain a little exhaust that way. If you need sand paper with adhesive on it I have s roll and will send you some Dan.

Very good point there Dan. Squishing .022" solder down to .005" is a lot. The squished solder measurement will likely be off a couple thou.

 

[paragonbuilder]

Shouldn't be too bad sanding the squish. If you look at the solder, it's mostly tight in the corner. It sands pretty quick. I start with 40 grit till I'm within .005, cuz it's pretty coarse, then use 120 to clean it up. A piece of 3/4 pine will fit up between the wrist pin bosses, and you can clamp it in s vise. Then just spin the cylinder on it. Works slick!

 

[drf256]

Why not use a factory .020 gasket?

Check squish afterwards. If it's .025, leave it there or sand the base down on your bench with sandpaper on glass.

Roof flashing is about .010 aluminum. I've used it as well.

 

[paragonbuilder]

Why not use a factory .020 gasket?

Check squish afterwards. If it's .025, leave it there or sand the base down on your bench with sandpaper on glass.

Roof flashing is about .010 aluminum. I've used it as well.

Cuz none of us can leave well enough alone... Lol

 

[Tor R]

Why not use a factory .020 gasket?

I dont think the factory gasket is 0.020, for awhile ago I bought both gaskets, wasnt much thickness difference between them.
First I was a bit dissapointed, my guess is that they did not wanted to have 0.020 gasket on the marked due 254 who has negative squish.

 

[paragonbuilder]

I dont think the factory gasket is 0.020, for awhile ago I bought both gaskets, wasnt much thickness difference between them.
First I was a bit dissapointed, my guess is that they did not wanted to have 0.020 gasket on the marked due 254 who has negative squish.

I just checked one. It's .025

 

[Tor R]

I just checked one. It's .025

0.030" is what I got, #503 70 48 01, the old gasket # 503 70 48 02 was 0.050".

# 503 70 48 01 is also used on 254 since 98 or something, if we go gasket less on 254 we cant crank it around due it's negative squish while 262 has 0.005-0.010" in squish.
I'm not saying there wasnt any 0.020" factory gaskets, but 254 is why they went for something between.

 

[RI Chevy]

Lol. You guys will be getting out the aluminum foil next.

 

[PA Dan]

I just checked one. It's .025

I have one that's. 030.

 

[Tor R]

Lol. You guys will be getting out the aluminum foil next.

lol ya, I'm so stubborn that I sand the squish band until I can go gasket less

 

[Mastermind]

I have one that's. 030.

Do I hear .035 ????

 

[Tor R]

Do I hear .035 ????

later tonight, after a few beer, you bet!

 

[Chainsaw Jim]

You can get away with a stihl 440 gasket. I measured one after coming off a saw and it's right at .015
All four holes need filed inward a few millimeters with a round file to match up.

 

[Stump Shot]

On a 254 project I ordered different gaskets from our site sponsor, One was .030" (Hiway?) and the other was .020" (generic). The .020" put me right in the ball park, was glad I had it.

 

[chipper1]

It was leaking?

That's just to funny, I'm afraid not all will have enjoyed it as much as I did.
So much so I'm considering using Grace ice and water shield on mine for a base gasket, I'll be sanding a lot I guess, but it shouldn't leak lol.

I do have a 262 I just installed a meteor on. Been waiting on a battery for the vernier caliper to check the squish, got it and now I'm busy and won't get to it til next week.

Shouldn't be too bad sanding the squish. If you look at the solder, it's mostly tight in the corner. It sands pretty quick. I start with 40 grit till I'm within .005, cuz it's pretty coarse, then use 120 to clean it up. A piece of 3/4 pine will fit up between the wrist pin bosses, and you can clamp it in s vise. Then just spin the cylinder on it. Works slick!

Awesome tip, hope I don't need to do it, but at the same time I hope I donas I will probably forget it if I don't. Maybe I better just chuck the old piston in the vise so I don't forget wether I use it or not.
Great read everyone, very informative and much of it is a bit over my head, but learning means I'm still living .
Thanks everyone.

 

[Chainsaw Jim]

Shouldn't be too bad sanding the squish. If you look at the solder, it's mostly tight in the corner. It sands pretty quick. I start with 40 grit till I'm within .005, cuz it's pretty coarse, then use 120 to clean it up. A piece of 3/4 pine will fit up between the wrist pin bosses, and you can clamp it in s vise. Then just spin the cylinder on it. Works slick!

I'd like to add a tip to that if you don't mind.
I've noticed grit falling off the very edge of the sandpaper while on the mandrel which leaves a tiny lip or step at the edge of the squish band. I made a chisel to scrape the little step away so the fine grit can finish it off. I'll actually use the chisel to cut the band and use the sanding mandrel to finish.

 

[paragonbuilder]

I'd like to add a tip to that if you don't mind.
I've noticed grit falling off the very edge of the sandpaper while on the mandrel which leaves a tiny lip or step at the edge of the squish band. I made a chisel to scrape the little step away so the fine grit can finish it off. I'll actually use the chisel to cut the band and use the sanding mandrel to finish. View attachment 42855 View attachment 42856

Excellent