351W buildup
Thread Starter
|
New User
Joined: Feb 2005
Posts: 11
Likes: 0
351W buildup
I'm putting together this motor that I just got back from the machine shop, and when I torque down any of the rods, the damn thing won't turn. It's like it's seized up. The plastigage shows my tolerances are right at .0015, I'm torqueing it down to 40 ft/lbs.. Anyone got a suggestion for me?
Senior User
Joined: Oct 2005
Posts: 484
Likes: 0
Do you mean it won't turn by hand or? You'd have to strong to turn it easily by hand without lube. For that matter, is everything really lubed up? Be generous if not. Putting a generous amount of assembly lube should make a huge difference.
Thread Starter
|
New User
Joined: Feb 2005
Posts: 11
Likes: 0
Trending Topics
Fleet Mechanic
Joined: Mar 2004
Posts: 1,529
Likes: 35
From: Kansas
Originally Posted by 85ORD
Just got a 79 block back from the machine shop. Had the crank ground .010. When I put it together with the .010 rod bearings, the engine won't turn over. I'm using plenty of assembly lube and have 40 ft/lbs on the rod caps. Any suggestions would be great, thanks.
First off, you need to use some Plastigage to check your clearances. Do one at a time. Check the clearance of one rod, take the plastigage out, lube your bearings and them assemble your rod bearing. After ONE rod bearing is assembled, give it a couple of turns by hand. If it feels good, go on to the next one after you have checked your clearance with the Plastigage.
You either have one (or several) bearing(s) too tight or your rod is out of round or your caps have been switched 180 degrees or switched with another rod.
You did put the caps back on exactly the same way you took them off, didn't you???.......
BTW, Plastigage is available at any auto parts store and it's pretty cheap, too. If you don't know, have the parts man explain how it works.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
New User
Joined: Feb 2005
Posts: 11
Likes: 0
All, Thanks for the info. I called the machine shop that I did the work. We pulled a rod bearing and double checked the part supplier. Come to find out, the bearings are for a 351C, not a 351W. I'm going underway for a few days, will post the outcome by the weekend. Thanks again.
Thread
Thread Starter
Forum
Replies
Last Post
notyettoday
Ford Inline Six, 200, 250, 4.9L / 300
2
Jul 22, 2006 08:10 AM