What engine do I have?
Thread Starter
|
New User
Joined: Sep 2006
Posts: 10
Likes: 0
What engine do I have?
Hi, I have a 1986 F250 4X4 that has 5.8HO on the air cleaner. I was told it had a 351m in it by the former owner but from what I have learned on this forum it should have a 351w. The motor has never been changed the truck is all original. I don't know how to tell the differance in the motors but it looks like a big block? Is there a simple way someone could tell me how to tell what I have or somewhere to get the numbers off of it and look to see what I have.
Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
sombody might have changed the air cleaner lid.i did on one of my trucks.it was a double snorkel off and 80's mustang.it's hard to tell the diference between the 351w and the302w.different deck heights .if your sure the motor hasn't been changed it should tell you on the sticker one rad support5.0 or5.8 litre with all the tune up info.hope this helps
Senior User
Joined: Jun 2007
Posts: 103
Likes: 0
Originally Posted by 86bigred
sombody might have changed the air cleaner lid.i did on one of my trucks.it was a double snorkel off and 80's mustang.it's hard to tell the diference between the 351w and the302w.different deck heights .if your sure the motor hasn't been changed it should tell you on the sticker one rad support5.0 or5.8 litre with all the tune up info.hope this helps
You can tell a 351W from a 351C/M by looking at where the thermostat housing bolts to the engine. If it bolts to the intake manifold, it is a W. If it bolts to the block, it is a C or M. The C/M doesn't have any water jackets in the intake, but the W does.
The easiest way to tell a 302 from a 351W is to check the width of the intake manifold. An outstretched hand across the intake should be able to touch both cylinder heads on a 302, but there will be a space of about an inch and a half on the 351W.
Hope that helps,
Dan Harriman 84 F150 lwb
Orange, Texas
Junior User
Joined: Nov 2006
Posts: 57
Likes: 0
From: Temple, TX
Chances are you've got a 351W. Somebody please correct me if I'm wrong but I believe that Ford did make some High Output 351W's for those trucks. I actually saw one once in a junkyard that had 351 H.O. on the air cleaner lid.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
351M/400 used in F100/350 from 1977 thru 1982
Bronco = 1978/82
Econoline = 1980/82
======================================
351W used in F100/350 & Bronco beginning in 1980
351W = 1975 and later on Econolines
Bronco = 1978/82
Econoline = 1980/82
======================================
351W used in F100/350 & Bronco beginning in 1980
351W = 1975 and later on Econolines
Last edited by NumberDummy; Jul 10, 2007 at 03:17 AM.
Trending Topics
New User
Joined: Feb 2007
Posts: 4
Likes: 0
Originally Posted by outlaw219
Chances are you've got a 351W. Somebody please correct me if I'm wrong but I believe that Ford did make some High Output 351W's for those trucks. I actually saw one once in a junkyard that had 351 H.O. on the air cleaner lid.
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
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
sombody might have changed the air cleaner lid.i did on one of my trucks.it was a double snorkel off and 80's mustang.
Fleet Mechanic
Joined: May 2005
Posts: 1,575
Likes: 11
From: Puyallup, WA
Unless someone changed the engine, you have a 351w.
You do not have a 302 as they were only available fuel injected starting mid year 85' ALL 86 models are EFI
The 351m was no longer offered in 1986, so that leaves just the 351w, at least in stock form.
If you are looking for any origional 1986 specs, I have the full set of manuals and origional sales brochures. I would be happy to pass along anything that you would like to know.
David
You do not have a 302 as they were only available fuel injected starting mid year 85' ALL 86 models are EFI
The 351m was no longer offered in 1986, so that leaves just the 351w, at least in stock form.
If you are looking for any origional 1986 specs, I have the full set of manuals and origional sales brochures. I would be happy to pass along anything that you would like to know.
David
Thanks for help