Notices

Compression for a 400?

Thread Tools
 
Search this Thread
 
Old May 23, 2009 | 10:59 AM
  #1  
fordjeep's Avatar
fordjeep
Thread Starter
|
5th Wheeling
Joined: Feb 2005
Posts: 43
Likes: 0
Compression for a 400?

I'm looking at buying a used 400. What should the compression be and is there anything else I should look at/consider?
 
Reply
Old May 24, 2009 | 07:54 PM
  #2  
Mud Rat's Avatar
Mud Rat
Senior User
Joined: Apr 2004
Posts: 259
Likes: 0
From: Eastern Ohio
Make sure it's a 400 and not a 351M.
 
Reply
Old May 24, 2009 | 09:22 PM
  #3  
fordjeep's Avatar
fordjeep
Thread Starter
|
5th Wheeling
Joined: Feb 2005
Posts: 43
Likes: 0
Originally Posted by Mud Rat
Make sure it's a 400 and not a 351M.
and how would I go about doing that? I know the only difference is the stroke, right? How can I measure that without tearing it down?
 
Reply
Old May 29, 2009 | 01:32 AM
  #4  
Winder's Avatar
Winder
Junior User
Joined: Jul 2007
Posts: 71
Likes: 0
pull the oil pan off and look at the casting on the crank.
 
Reply
Old May 29, 2009 | 11:51 AM
  #5  
mustang81's Avatar
mustang81
Laughing Gas
15 Year Member
Liked
Loved
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
400 crank casting number are 5M, 5MA or 5MAB. 400 crank also have a small ridge at the front of the first counterweight, about one inch from the bottom of the counterweight witch 351m don't have. 351m casting is 1K.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Tadashi
6.0L Power Stroke Diesel
56
Oct 10, 2011 08:31 PM
alstieg
1999 - 2003 7.3L Power Stroke Diesel
5
Oct 31, 2009 04:29 PM
clawhammer
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
1
May 23, 2008 05:57 PM
TMI
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
25
Feb 2, 2006 09:33 AM
1bad400
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
4
Oct 12, 2002 11:58 PM




All times are GMT -5. The time now is 07:21 PM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE