351 crank question - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 06-11-2005, 00:29   #1 (permalink)
Krazy Kyle
 
Bounty's Avatar
 
Join Date: Jun 2003
Location: In The Mount
Age: 29
Posts: 97
351 crank question

i just ripped apart my motor and was wondering how to tell if its a 351 or 302. i cant find 351 stamped on it anywhere, wondering where it is stamped if it is, how else i can work out if its a 351 and if aftermarket cranks have 351 stamped on them.

thanks
__________________
XF Ute. 351. LSD 9" 4wdics. Manual. Lowered. Tinted. All Elec. 16" mags. Huge "doof doof".
Bounty is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-11-2005, 00:53   #2 (permalink)
Registered User
 
Join Date: Sep 2004
Location: Country NSW
Posts: 268
Re: 351 crank question

The stroke of a 302 is 3", 351 is 3.5". Put a ruler beside crank measuring the offset between mains centre to a centre of a conrod main.

Otherwide if it is a factory motor; go off the rod centre to centre length. 302 =6.030" and 351 = 5.7"
silicon is offline   Reply With Quote
Old 06-11-2005, 01:19   #3 (permalink)
Registered User
 
TruBlu351's Avatar
 
Join Date: Apr 2003
Location: Newcastle
Posts: 2,398
Re: 351 crank question

If it has already been rebuilt, there's a possibility it's a 351 fitted with 302 rods with short deck pistons.

Just something else to check before making a snap.

Some poor bugger just posted that he found 7 x 351 rods and a 302 rod in his rebuilt motor!!

Give your crank a good degrease to possibly reveal the stamps.
__________________
XE Falcon
393 Tremec TKO 9"
TruBlu351 is offline   Reply With Quote
Old 06-11-2005, 01:35   #4 (permalink)
Registered User
 
Join Date: Sep 2004
Location: Gisborne, Victoria
Age: 53
Posts: 442
Re: 351 crank question

Quote:
Originally Posted by Bounty
i just ripped apart my motor and was wondering how to tell if its a 351 or 302. i cant find 351 stamped on it anywhere, wondering where it is stamped if it is, how else i can work out if its a 351 and if aftermarket cranks have 351 stamped on them.

thanks
All 302C cranks have "302" cast on them. US 351 cranks will have "4MA" or "4MAB" stamped on the front web. All Australian 351 cranks have "351" cast on them.

Hope this helps

Steve
__________________
Cosmic Blue XA GT Hardtop,
Tropical Gold Landau,
Neptune Blue XC 5.8 Fairmont Hardtop,
Pine N Lime XC 5.8 GS Fairmont Wagon,
Apollo Blue 75 ZG Fairlane 50th Anniversary.
Brooklands Green 83 Capri Mk3 2.8i
Green EL Fairmont Ghia (The wifes).
Black BA XR6 Ute
Fordson Super Major Tractor
Fordson Super Dexta Tractor
Ford D1211 tray truck
Yes, I like Fords.
jg66me is offline   Reply With Quote
Old 06-11-2005, 02:30   #5 (permalink)
Registered User
 
Join Date: Sep 2004
Location: Country NSW
Posts: 268
Re: 351 crank question

Quote:
Originally Posted by jg66me
All 302C cranks have "302" cast on them. US 351 cranks will have "4MA" or "4MAB" stamped on the front web. All Australian 351 cranks have "351" cast on them.

Hope this helps

Steve

My brother's crank has neither 351, 302 , 4MA or 4MB on it. It is a 351 crank.
silicon is offline   Reply With Quote
Old 06-11-2005, 02:52   #6 (permalink)
Approach with caution.
 
Join Date: Oct 2004
Age: 42
Posts: 1,043
Re: 351 crank question

Quote:
Originally Posted by silicon
My brother's crank has neither 351, 302 , 4MA or 4MB on it. It is a 351 crank.
it will be a late version american cleveland crank, they had no markings on them
__________________
F6: the fastest factory 4 door falcon in the world!
4Vman is offline   Reply With Quote
Old 06-11-2005, 02:57   #7 (permalink)
Registered User
 
Join Date: Sep 2004
Location: Country NSW
Posts: 268
Re: 351 crank question

Quote:
Originally Posted by 4Vman
it will be a late version american cleveland crank, they had no markings on them

It has some the same size as the 4MA stampings and in the same location. I haven't wrote down what they are though. Motor is in/from a XB.
silicon is offline   Reply With Quote
Old 06-11-2005, 23:06   #8 (permalink)
Registered User
 
Join Date: Mar 2005
Posts: 475
Re: 351 crank question

The 'better' US cranks were 4MA and 4MAB. Pretty sure the poverty packs had '2H' on them, but I can't be 100% on that.

Bottom line, if it has the capacity (302/351) it is Aus, if it has a code, it is US. Us never had a 302 clevo, so it will be a 351.
RPO-083 is offline   Reply With Quote
Old 06-19-2005, 02:29   #9 (permalink)
Registered User
 
landau37's Avatar
 
Join Date: Feb 2005
Location: wollongong
Posts: 197
Re: 351 crank question

Hi what is the difference between 4ma and 4mab, also i see there is a 4mab crank on ebay that started at $250. becouse its out of a gt phase 3 do the gt ones have a mark on them to say they are gt.
landau37 is offline   Reply With Quote
Old 06-19-2005, 02:52   #10 (permalink)
Registered User
 
xdclevo's Avatar
 
Join Date: Mar 2004
Location: Cairns
Posts: 1,946
Re: 351 crank question

Quote:
Originally Posted by landau37
Hi what is the difference between 4ma and 4mab, also i see there is a 4mab crank on ebay that started at $250. becouse its out of a gt phase 3 do the gt ones have a mark on them to say they are gt.
I personally think they are all the same, including the std cast one, with 351 cast into it. I think they will all handle the same power, but back to the question.
How i see it is there is the 4MA crank, and there is 4MB which is exactly the same thing that had a hardness test, maybe as quality control?
Could be all crap, but all 351 cranks are strong. Fact.
Use what ever you can get cheapest is good condition.
xdclevo is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 03:40.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.