I'm trying to get my brand-x 350 running so I can sell it. Its been sitting a few years and one or more of the pistons has seized. Since running cars seem to go for more money, I need to free it up. The motor is still in the car and a breaker bar on the crank and the starter have failed so far. I used marvel mystery in the cylinders today but I dont expect any results for a few days. Anybody have any other tips that have worked for them? I dont want to have to pull the motor apart, if I do, then I'd rather just part it out and take the loss. Thanks.

 

Yer goin right... now lots and lots 'o patience . Try after 3-4 days... add more MMO, try again in a couple of days...I had the same problem withy another brand-x & I got it freed up after about 5 days... I used the bump with the starter method tho, It seems a better 'shock' to break it free, the breaker bar is more steady pressure.

 

You're gonna change the oil anyway, dump a little diesel in on top of the pistons it should give ya the desired result a little sooner.

 

do not use the starter to turn the motor
do it by hand

 

keep adding MMO to all the cylinders, let it sit, add some more, shake your fist at it, insult it a little, add some more MMO, let it sit a little longer and then try turning it by hand.

 

a little helper is too take the valve covers off and loosen the rockers so your only turning the bottom end not the whole rotating mass, then ounce the bottoms free, put them back together, you may be fighting stuck valves aswell as pistons. if you seperate then get the bottom free. it wont be as hard to get the valves free then . not as much resistance. not to involved, so your not really taking the motor all apart.

 

I dont have any diesel, but plenty of kerosene! Would that work?

 

sure, great parts cleaner.

 

Fine then....down the carby it goes! HaHa! I'll see what plug holes it runs out of and Ill know to fill the other cylinders with a hose and a funnel!

 

Still no progress today. It has till this weekend or it'll be parted out on craiglist! I hope it heard that! I need the $ and cant afford to be 'effin around any longer.

 

What kind of car is it? try tapping the bolt that holds the harmonic balancer a couple of times or between the water pump and balancer on the block

 

Its a 86 Z28 with a 355 4bolt main. I borrowed an oil pump priming driver from AZ today. Ill try spinning that for a while and hope something happens. Next step, the car is a stick [and for sale!] I might let it roll down the driveway and try popping the clutch a few times. I have the weekend off, so stay tooned!

 

Good luck just in case I have 50 cents.

 

Need more than that, every penny goes to FOC for my daughters braces! Wish I had an emoticon with crooked teeth! HaHa! Dont think I should pay for it anyway, MY familys teeth are straight! Its her moms side that has all the blown-out smiles. Dont insult the Z28, I was young then. and everytime you say something mean, God kills a kitten.

 

But it's only if it don't start

 

Thats TWO dead kittens mister!

 

You want me to send you 2 dead kittens?

 

after reading all of this Scott did you get it to turn over or did you parts it out

 

Its on Craigslist now. I gave up, need .

 

Don't give up just yet, Scott. If you weren't so far away I'd buy the little rascal but alas.........

I'd have shoved a gallon of diesel down 'er. It seems to work better than almost anything else. Shocking these engines with the starter gives you a chance of unseizing but also runs the risk of piston and ring damage. Worst case scenario? -probably rings in the sump.........
Seriously, a bit more patience and you might have some success. Since you have a stick shift it might be an idea to rock the car back and forth in gear a few times each day........................

 

With the plugs out, put penatrating oil (good stuff) not WD-40 in each cyl. Let it set 2-3 days adding a little more each day.
Hook on to it with a tow vehicle at 5-10 MPH and pop the clutch a few times.
If it won't free up, raise your price and then sell it AS IS for a reduced price.

 

Wellll???