wrist pin removal

[ferenza]

Does anybody know how to remove the wristpins from the pistons?I have replacement tops but i dont have a press to take them out.Is there any other method?
Thanks

[oyajicool]

I think I've read some place that if you heat up the assembly, it would be easy to remove the pin.

[RyanD]

they dont float? i thought they move around in the cylinder

[badfish82]

There should be circlips in there. theres a small divot in the piston where the wrist pin gos in use a pic and pull both sides out. Heat will help remove the pin after the clips are out but most times i use a punch the same size as the pin and by hand push it out. With out heat that is.

If your replacing the piston you can put it in a vice with the con rod loose and facing upwards and tap the pin out with a hammer, be very careful if you go that route not too damage the rod, tap tap tappy.

[oyajicool]

http://www.hondaautomotiveparts.com/...SHAFT+-+PISTON

I don't see circlip listed on IPC above.

[Jarrett]

There aren't circlips on the F22A pistons. They're pressed in. The same applies to most of the OBD1 F/H engines but has nothing to do with on-board diagnostics. The later engines like the F23A1 or H22A4 have circlips because they use a floating style pin that would likely work its way out if not for the clips.

[ferenza]

Thanks everybody for responding

So i am able to just tap them out? i have a small torch but i doubt it would do much

Would putting the asseembly in the freezer chill and shrink the metal enough that it would slip out?

[oyajicool]

I just assumed that the OP has an F22Ax engine.

Place the assembly in a oven or something. I wouldn't use torch.

Chilling for removal won't work.

Chilling pins and heating the rest for install would work.

[badfish82]

There aren't circlips on the F22A pistons. They're pressed in. The same applies to most of the OBD1 F/H engines but has nothing to do with on-board diagnostics. The later engines like the F23A1 or H22A4 have circlips because they use a floating style pin that would likely work its way out if not for the clips.

Well eff me running...I did not know that.

[ferenza]

I just assumed that the OP has an F22Ax engine.

Place the assembly in a oven or something. I wouldn't use torch.

Chilling for removal won't work.

Chilling pins and heating the rest for install would work.

Ok. I give it a try.
I have a f22b1 block with a f22a1 head. I pulled this motor from my friends car since he went h22. He bought the car with this setup

[silver91]

Thanks everybody for responding

So i am able to just tap them out? i have a small torch but i doubt it would do much

Would putting the asseembly in the freezer chill and shrink the metal enough that it would slip out?

You'll be money & time ahead if you take them to a competent machine shop & have them remove the old & press on the new. It is an interference fit so, it will take considerably more than a tap. While the rods & pistons are at the shop the large end should also be checked for roundness, - if any or them would happen to be out of round the large ends should be re-sized. Of course this is only my two cents. It's good that you're wanting to jump in & do this work!

[ferenza]

okay. I think ill do that since im sending the crank in anyway. I wanted to clean them good before i started my measuring process.

So far, my head is done. I took it apart, cleaned , measured and resealed .


The bottom end cleared


And also , i know the f22a blocks have a little block off plug on top of the oil pressure switch and when i i took it apart, this one did have it

Do i need thay little plug? Or is it going to be fine without it?

[oyajicool]

That must be an orifice which controls amount of oil going into the head so there will be appropriate amount of oil and pressure down below, ie, crankshaft, rods and such.

I would keep it there.

[Jarrett]

It's an oil control orifice that non-VTEC engines use and VTEC engines do not. I would buy one from the dealer and install it to ensure you always have correct oil pressure. If you had an F22B2 or any F22A block you would already have it.

[ferenza]

Thanks for clearing that up because i was gonna finish this motor up and wouldnt have thought about it again.im gonna head to the dealer to nab one.