Pulling pistons

[cracked head]

I was just wondering.

If I need to pull the piston out the top of the block, how do I do that when I can't grip anything??

I know someone out there has a real simple answer, I just can't think of one myself.

[rallyruss]

simple answer. they dont come out the top of the block.

 

long answer. you pull the 14mm allen plugs and take the wrist pin clips and pins out, split case open. push out pistons.

[toybuilder]

They most certainly will come out the top of the block.

 

http://www.ultimatesubaru.org/forum/showthread.php?t=21829

 

simple answer. they dont come out the top of the block.

 

long answer. you pull the 14mm allen plugs and take the wrist pin clips and pins out, split case open. push out pistons.

[rallyruss]

ok I suppose its possible but is definatly not the intended way to tear down a motor. it would alow the rods to dragup and down the cyl bore(not good) and why would you really be pulling pistons without doing the rest of the lower end?

 

so I stand corrected... kind of..

 

I would still pull the case apart and do it right.

[RavenTBK]

Yep.. the method described in that thread is the preferred method thats described in the HKYSA book. So it most certainly can be done.

[cracked head]

ok I suppose its possible but is definatly not the intended way to tear down a motor. it would alow the rods to dragup and down the cyl bore(not good) and why would you really be pulling pistons without doing the rest of the lower end?

 

so I stand corrected... kind of..

 

I would still pull the case apart and do it right.

Thanks, I was going to split the case as well, but thought I read somewhere that the pistons had to come out the top. Toybuilder's trick is kinda what I was originally looking for though. Thanks for putting me straight.

[RavenTBK]

The pistons DO come out the top. The debate is how to get them out. Either by splitting the case to knock them out, or to just do the pin trick and push them out without going to the trouble of splitting the case open.

[cracked head]

The pistons DO come out the top. The debate is how to get them out. Either by splitting the case to knock them out, or to just do the pin trick and push them out without going to the trouble of splitting the case open.

Thanks again!!

[rallyruss]

I suppose I was a bit vauge there. sorry.

 

due to the baffles and othor supporst in the center section of case you cannot just split case and drop the crank,rods,andpistons out the middle.

old vws did come appart more like that.

 

I was only trying to state that just pushing the pistons out the top with the lower end assembled is not the proper way to do it. It may work for some and thats fine. I just dont think its a good method to recomend as a general practice.

[toybuilder]

I just answered the question that was asked. I did not offer my opinion about the matter.

 

 

 

I suppose I was a bit vauge there. sorry.

 

due to the baffles and othor supporst in the center section of case you cannot just split case and drop the crank,rods,andpistons out the middle.

old vws did come appart more like that.

 

I was only trying to state that just pushing the pistons out the top with the lower end assembled is not the proper way to do it. It may work for some and thats fine. I just dont think its a good method to recomend as a general practice.

[rallyruss]

I just answered the question that was asked. I did not offer my opinion about the matter.

fair enough. no hard feelings. like I said I did a poor job answering the question in the begining.

 

as for opinons they are like... well you know.

[toybuilder]

:drunk: Definately no hard feelings.

 

yeah, I know...

 

 

fair enough. no hard feelings. like I said I did a poor job answering the question in the begining.

 

as for opinons they are like... well you know.

[LPGsuperchargedBrumby]

i found the easyst way to get pistons out without spliting the cases is to take the pin out then hook a compressor on to the oil filler pipe after blocking off both head breather lines, i used a spraygun type pressure regulator and just slowly turned up the pressure the piston started to move @7psi or so and popped out neat as

[jlgreen8]

I just answered the question that was asked. I did not offer my opinion about the matter.

 

So how do you pull the pin after the circlip is removed? Don't tell me a magnet, or pliers, cause it ain't gonna happen that way.

[cracked head]

I made a hook out of a sturdy piece of thick wire and went inside the pin to the other end and hooked it and kinda yanked and pulled until it came out. It's not pretty, but it works just fine.

Good luck!

[4x4_Welder]

I used a large nail, gripped it with vise grips, and pulled the pin.

If the engine has to be re-ringed, you might as well split the case to clean all the gunk out. Plus, then you can replace the o ring for the coolant passage and not worry about that leaking.