29 replies to this topic

[Fliboi]

Got a '62 suzuki MA50 here, been sitting for like 20 years and the piston is pretty stuck now.

what are the best ways to free it up?

[Poo]

if the piston is near tdc........or near bdc. (obviously you wouldnt want it at precisely tdc or bdc)
smash the ceramic out of a spark plug and weld a grease nipple on it.
then pump some grease in there.

[Testament]

auto trans fuild + acetone is supposed to make boss penetrating oil never tried it though.

if the heads off used the head bolts to bolt some angle or channel down with a hole in the middle with the big nut welded on and wind a bit bolt in to force piston down and free it up if you ar lucky.

[Borgweiser]

coca cola, true story
or warmed up diesel has never not worked for me

[k-trips]

Sit bore vertical and make a puddle of on top of the piston with CRC and kerosene - soak 24 hours - try to move - repeat.

Will most probably break the rings and it may have pitted the bore but nothing will turn back the hands of time (barring a Delorean)

[Poo]

Yeah, coke and crc didnt work for me. Hence the need for grease nipple action

[Seedy Al]

warm diesel??
Be cooking that shit in the microwave.
nothing like a warm glass of diesel before bed

[Spencer]

auto trans fuild + acetone is supposed to make boss penetrating oil never tried it though.
.

This shit is magic always have some mixed up, if you can get it MEK is better than Acetone, doesnt evaporate as quickly. A few cycles of heat and this shit has worked well for me

[Fliboi]

currently have a mix of diesel and crc soaking in there now.

ive heard the grease trick can crack heads and cylinders so that would be a very very last resort.

[Yowzer]

Your piston would have to be pretty solid if the head gives out 1st.

[Ned]

Your mums pretty solid and she gives out head all the time...

[tortron]

if its super stuck

fill with diesel, light on fire

grease would probably work, iv used it to pop various small pistons out (brakes)

top tip for removing a stuck head (but pistons move) stuff a rag down the sparkplug hole and crank over by hand


edit* I have also set up some blocks of wood and a hub puller to get a stuck piston out. Take care in setting this up as if you do it wrong you will break fins

[Seedy Al]

to me, this thread is what old school is all about
how to fix old shit

[Fliboi]

i like the idea of using the head studs to make a pusher, its not likely to damage the studs? and i understand ill need to spread the load over the piston.

also setting the diesel on fire? that seems very simple, how effective is it? do you know how it works?

[slacker.cam]

I presume that lighting the diesel on fire is simply to get some diesel down around the tops of the rings and then adding heat to get the contraction/expansion going on to help it come free. I wouldn't be surprised if that technique came about from someone soaking the bore with diesel (like you're doing now) and it not working. Probably set it alight as a last resort due to it not working haha.

[tortron]

that comes straight from model A, 4 banger tuner uperer's

i think i saw it originally on the HAMB

but heres one i found just now
http://www.smokstak....ead.php?t=37566

[Fliboi]

looks like people have had stunning success with fire! leaving it to cool over night seems like a crucial step and like you say, it seems to alow the oil to penetrate.

[felixx]

make a video

[Fliboi]

actually, not a bad idea. will do,

potential series? 'how to swear at and light old shit on fire, expecting miracles'

[felixx]

actually, not a bad idea. will do,

potential series? 'how to swear at and light old shit on fire, expecting miracles'

with a bonus episode by Joan of Arc?