79 Bronco Headach
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,355
Likes: 0
From: I live in Mustang, OK
79 Bronco Headach
Ok, Here we go. I've been on here for a few yrs. Started out a few yrs back with a 50 f1. Hence the log in name. But now I have a 79 Bronco with a 351m in it that is worn out. I found a rebuilt 400 and bought it. Now here comes the problem. The 351 has a rear oil sump pump. The 400 has a front sump oil pump. I don't have the 351 pulled out yet. But I pulled the pan off the 400 and it looks like the oil pump will still hang down to far for the 351 pan to work. I was told that all I had to do is take the pickup tube off the 351 and put it on the 400 oil pump and put the oil pan off the 351 on the 400 and it would be alright. Mind you I'm not much of a mechanic when it comes to engines what will or will not work. But there has to be a way to make it work because the 78 and 79 Bronco came out with the 351 and the 400. Am I right or is this just another bind that I've gotten my self into and spent money on an engine that I can't use..... Please HELP..........
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,355
Likes: 0
From: I live in Mustang, OK
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,355
Likes: 0
From: I live in Mustang, OK
Senior User
Joined: Jul 2014
Posts: 435
Likes: 2
From: Bloomfield, NM
I agree. did the same thing to a friends truck when he made the same change. gotta watch the valve guides on a used motor. just a little heads up. might be good to get em looked at before you have the motor in the truck. weird angle of the valve tends to wollow out the guide and cause oil leaks.
Elder User
Joined: Jan 2012
Posts: 954
Likes: 0
From: Viva Las Vegas
When you prime the oil system be sure the drill is in reverse, you may know that already but just a reminder.
Did you get the receipts for the engine build? The only way to tell the difference between a 351m and a 400 is the casting numbers on the crank, you will want to verify that it actually is a 400.
Did you get the receipts for the engine build? The only way to tell the difference between a 351m and a 400 is the casting numbers on the crank, you will want to verify that it actually is a 400.
Trending Topics
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,355
Likes: 0
From: I live in Mustang, OK
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
Elder User
Joined: Jan 2012
Posts: 954
Likes: 0
From: Viva Las Vegas
Priming is easy, you need to pull the distributer (make sure to note the direction of the rotor before pulling, it needs to go back in the same position if you don't want to have to reset the timing) and use a drill with a 8-10" extension and 5/16" socket. Run the drill in reverse for several minutes to make sure all the bearings and moving parts get lubricated BEFORE starting the engine. Never start an engine that has been recently built or has sat for an extended period of time with out doing this.
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,150
Likes: 5,785
From: S/W Missouri, Polk county
Tape the socket to the extension.. 
...and come distributor reinstall time use a tab of grease to hold the oil pump shaft straight so the distributor goes on without a hitch.
...and come distributor reinstall time use a tab of grease to hold the oil pump shaft straight so the distributor goes on without a hitch.
Thread
Thread Starter
Forum
Replies
Last Post
dobber97
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
3
Nov 5, 2008 08:34 PM
tbspks
1948 - 1956 F1, F100 & Larger F-Series Trucks
10
Jul 20, 2005 08:58 PM
f-4x4
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
10
Jan 6, 2005 10:52 PM