Unseize Technique
Thread Starter
|
Freshman User
Joined: Apr 2020
Posts: 26
Likes: 0
Unseize Technique
I’m working on trying to free up a 302 that has sat 10ish years. After reading online, I opted for the PB Blaster/Marvel Mystery Combo in each cylinder.
Immediately after oiling each cylinder I took a breaker bar to the crank bolt and got about an 1/8 of a turn applying minimal force. My question is should I go out each day and work the crank back and forth with the small amount of movement I’ve got, or wait a week before touching it again?
Immediately after oiling each cylinder I took a breaker bar to the crank bolt and got about an 1/8 of a turn applying minimal force. My question is should I go out each day and work the crank back and forth with the small amount of movement I’ve got, or wait a week before touching it again?
Thread Starter
|
Freshman User
Joined: Apr 2020
Posts: 26
Likes: 0
went out this morning and no apparent change in movement. Do I really need more oil or just wait to let the oil that is in the cylinder work? There is 3-4oz of Marvel in each cylinder plus PB blaster.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
I vote to wait, Marvel's and PB are both solvents with penetrating oil. The wintergreen oil in MMO isn't just there to smell good, it's one of the best penetrants there is. It's a synthetic, but it works. Is it still locked??
If it was stuck for 10 years what's another week or two? Be patient. Just keep spraying and rocking it. I remember using Liquid Wrench on some carb studs that wouldn't budge and after a few days of soaking and shocking them with a hammer they were basically finger tight. Kroil and Moovit are supposed to be good too.
If it was stuck for 10 years what's another week or two? Be patient. Just keep spraying and rocking it. I remember using Liquid Wrench on some carb studs that wouldn't budge and after a few days of soaking and shocking them with a hammer they were basically finger tight. Kroil and Moovit are supposed to be good too.
Thread Starter
|
Freshman User
Joined: Apr 2020
Posts: 26
Likes: 0
What is the physics of having only a small amount of movement? Piston at the bottom of the stroke has a rust line so it’s dipping just below before hitting it again?
no one mentioned oiling the valve train in all the reading I’ve done, just pull spark plugs and fill with MMO?
no chance I have the cam binding some how?
no one mentioned oiling the valve train in all the reading I’ve done, just pull spark plugs and fill with MMO?
no chance I have the cam binding some how?
Trending Topics
Thread Starter
|
Freshman User
Joined: Apr 2020
Posts: 26
Likes: 0
I suspect the passenger side rear cylinder is the rusty one as the spark plug had some rust on it.
the second from the front on the driver side is at the top of the stroke as all the oil cane pouring out when pumped in.
not sure if that puts that rear cylinder at the bottom of the stroke in a 302w.
the second from the front on the driver side is at the top of the stroke as all the oil cane pouring out when pumped in.
not sure if that puts that rear cylinder at the bottom of the stroke in a 302w.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
I had two 390's that sat for years and filled all cylinders with ATF, let em sit for an hour the put a breaker bar on the damper bolt. Both turned 2 full revolutions with no sticking after the first movement. 1/8 turn is half a stroke in the cylinder, so if it moved that far, I'd keep going. Rotate it two full revolutions, that's a full firing order on the dsitributor
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Thread Starter
|
Freshman User
Joined: Apr 2020
Posts: 26
Likes: 0
I've got it to turn about 1/3 now, but it locks up tight on both sides. Trying to put a little extra and the balancer nut starts to loosen. Going to stay after it but may try to flip the transmission into neutral for fun.
One thing I did notice, due to cylinder stroke and spark plug angle the two middle pistons on the passenger side had already let the MMO seep down into the oil pan while the cylinder in the rear still was full.
One thing I did notice, due to cylinder stroke and spark plug angle the two middle pistons on the passenger side had already let the MMO seep down into the oil pan while the cylinder in the rear still was full.
Fleet Owner
Joined: Apr 2008
Posts: 24,323
Likes: 5,133
From: 0,0,1
Logistics Pro
Joined: Aug 2014
Posts: 3,570
Likes: 854
I use SeaFoam spray, Moovit, and Mercury Marine Power Tune for eating rust.
For soaking, some have poured ATF in the cylinders, and if engine was out, put the whole thing in a 40gallon drum submerged in ATF.
For soaking, some have poured ATF in the cylinders, and if engine was out, put the whole thing in a 40gallon drum submerged in ATF.
