How to free a stuck engine? UPDATED 10-20-08

[Enginerd]

I just got a 73 blazer with 350\TH350\NP203 that has been sitting out in the open uncovered for the last two years. I got it from a co-worker who stopped driving it due to fuel costs. At the time he had just bought a newer Toyota 4Runner and just parked the blazer.

To make a long story short, the engine is stuck. I pulled all the plugs and found a bit of rust on the plug from the No. 4 cylinder. Otherwise, all the plugs looked good, like the engine ran well when it wa sparked. I sprayed some WD-40 in all the cylinders and then put a few squirts of motor oil in each cylinder the next day and put the plugs back in. It has been sitting like this for the past two weeks. I tried to turn the engine with a wrench on the balancer bolt, and tried turning the flex plate, but there is not much leverage available. Anyone have any suggestions on chemicals or techniques I should try to get this engine broke free?

Thanks.....

 

[Jason4x4]

I've done it with a chain wrench around the crank pulley. back and forth, back and forth...

 

[wasted wages]

pull all the plugs,,,fill the cylinders with diesel fuel and let it sit over night.

use a pry bar to walk the flywheel a few teeth back and forth,,,
go in small steps,,,work more in one direction than the other,,

once you make a full revolution,,hit it with the starter with the plugs out.

if it spins free,,add a little more fuel and spin it again...you want to blow out any loose rust etc..( it's going to make a mess )

squirt in some oil into the plug holes,,,spin it over again.

screw in the plugs,,give it some fresh gas down the intake and fire it up ...
Yes it will smoke,,,bad,,,

 

[gone huntin]

A friend of mine that used to run a junkyard used brake fluid in the cylinders. He let it sit in it for a few days and it always freed them up.

 

[sweetk30]

pb blaster is super to use also.

 

[1980]

pb blaster is super to use also.

PB Blaster is a gift from GOD !!!

 

[chevyridinhigh79]

marvel mystery oil works wonders

 

[cegusman]

marvel mystery oil works wonders

Thats what I used to free up my 6.2 diesel that sat for 3 years

 

[wasted wages]

did you marvel over the mystery of how it worked ??

 

[Enginerd]

pull all the plugs,,,fill the cylinders with diesel fuel and let it sit over night.

use a pry bar to walk the flywheel a few teeth back and forth,,,
go in small steps,,,work more in one direction than the other,,

once you make a full revolution,,hit it with the starter with the plugs out.

if it spins free,,add a little more fuel and spin it again...you want to blow out any loose rust etc..( it's going to make a mess )

squirt in some oil into the plug holes,,,spin it over again.

screw in the plugs,,give it some fresh gas down the intake and fire it up ...
Yes it will smoke,,,bad,,,

This seems like the eay to go. I had been thinking of using MMO in the cylinders, but diesel or brake fluid would probably do a good job too.

Thanks for the replies!

 

[70jimmy]

Yep Marvel Mystery Oil. Unstuck several motors with that.

 

[chevy wrangler]

any pics of the blazer??

 

[chevyridinhigh79]

Thats what I used to free up my 6.2 diesel that sat for 3 years

im still wondering how it stuff works but then again who cares as long as it works

 

[Enginerd]

UPDATE!!! Its free!

I used a good penetrating oil in an aerosol can and used a small hose to get it to all the cylinders. It sat for two weeks(due to bad weather). When I went out saturday morning, I nudged the teeth on the flexplate with a prybar and it seemed to wiggle a bit. I made sure the battery was charged, then jumped in and turned the key. Nothing happened the first time. I thought "I will give it one more try". Second time I cranked it, the starter popped it loose. I think it was only stuck in one cylinder. So I changed the oil and filter, then turned it over a few times with the plugs out. (I checked all the vital fluids before trying to start it.) A lot of rusty junk came out of the #4 cylinder. I stuck all the plugs back in, primed the carb and cranked it. No dice. I tried once more and it started right up. I am so amazed that it was actually quiet, there was no smoke, and it had good oil pressure. I expected some valvetrain noise or something. Then I got really brave and tried the transmission(Fluid was full, red, and unburnt) Drove it with no insurance or plates to the neighboring subdivision and back. To my continued amazement......the tranny worked great. No sloppy shifts at all, and all three gears were there!

Next comes the tune-up to include setting the timing/points (yes points....how quaint ....) , plugs, wires and a wee bit of time with the Qjet.

Stay tuned....

any pics of the blazer??

No pics right now, but I will get some posted soon.

 

[wasted wages]

wow,,,points,,,I remember them......

good deal with getting it broke free !!!

 

[Mudstud]

Good deal. This was a good thread, learned a few things.