I have a pontiac motor that is stuck pretty good supposedly from sitting for 6or7 years. I have the plugs out now and I put transmittion fluid and a bunch of marvels mystery oil in the cylinders because that is what alot of people around here have told me to try. I can click the key and make the starter turn it just a teeny bit but I don't want to burn the starter up trying to get it to turn over. I tried with a breakover bar on the balancer bolt but I can't really get it to do much. Is there any tricks that anyone knows or anything else I can put on top of the pistons to make it break free faster. I've been trying for three days now. If not does anyone near arkansas have or know where to find a 350,400,or 455 pontiac motor that runs for sale or trade? I have a 400 that a buddy of mine traded me out of an old demolition derby car but I haven't looked at it to see what shape it is in. Also how hard would it be to find a four barrel intake for it so I have an easier time getting a good carb. The car is a 70 pontiac lemans for those who don't know. I really appreciate any input anyone has on the subject.
Hey Kust....if it turns a little, have patience and keep soaking down the cylinders...don't rush it or you could brake a piston ring or even a piston. Squirt.....wait.....squirt....wait...try to turn it over with all the spark plugs out. Go back in the house and let it soak overnight...try again tomorrow. Last one I did was an old Morris Minor motor...took 3 days of soaking in a mix of atf, crc and just a touch of lacquer thinner to make the mix really thin....after 3 days it busted loose... No, the LAST one I tried never busted loose after 4 months of fucking around...hadda bust the pistons out. At least yours moves a little....it'll be ok with a little patience...
Take off the inspection plate off the trans.Then you can use a large screwdriver or prybar to move the flywheel.You can get a lot more torque on it that way.
So do I need something thinner than tranny fluid? I thought about using some stuff I have for removing rusty bolts its called PB blaster it works great on bolts but I don't know about engines. used to use wd 40 on dirt bike motors that I messed with before I could drive but I would usually take the head off also to help get it unstuck. Is there anyway other than tearing the motor down to check maybe if its a bearing problem? The motor was full of oil also. I thought maybe it could have a stacked bearing or something but I'm going to keep on trying by soaking it. If the cylinders are very bad rusty I bet when I do get it unstuck it'll smoke like a frieght train. I already have the dust cover off of the tranny cause I thought the starter was messed up originally. I guess I'm getting to impatient as I get older or to much crap going on at once anymore. I own 15 cars all in different stages of life. Its like my own wrecking yard. Good thing I live in the country now.
there was a neat tech post about finding the top dead center, or near to it, and adapting a grease fitting to a spark plug housing to use hydraulic pressure from grease to bust it loose.look for that maybe.
I had posted this some time back.I haven't personally tried it but the person who told me is someone not given to bullshit. He recommends using heated olive oil down each cylinder.Says it works wonders. I had a 389 that hadn't run since 1979(17 years at the time)and I used WD-40 and P-B Blaster and let it set for a week or two.Put a fresh battery in it,hit the starter and it broke free on the second kick.Drained the oil out(all 12 quarts or so;an oil/antifreeze.water mix)and put in fresh oil and filter,put fresh gas and a new electric pump(rebuilt the AFB)and lit it off!It ran pretty decent except the oil pressure gauge was acting like a vacuum gauge and it sounded like a bunch of psychotic woodpeckers inside a 55 gallon drum but it ran!Drove it about 50 miles and it was running pretty good when I finally shut it down and pulled it out for replacement.I'm going to pull it down one day to see what it looks like inside. Ray
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