4.0 sohc explorer engine

Pesce Nero · 02-23-2009, 06:18 PM

truck belongs to girl i work with. her boyfriend tried changing timing chain and tensioner. he put it back together. wont start or run.

they asked my advise, i asked if they have valve timing correct. i dont think they do. went and looked at this mess today and i would like to know how you figure out where valve timing is in relation to the crank. there is a shaft that runs thru the engine and somehow, if you take the bolt out of the cam sprocket(not really cam sproket but shaft sprocket i guess) it will free wheel.

i figure your supposed to set the engine on TDC before you start this job and everything turns out fine but if that didnt happen, then what?

guess i can spin the valve gear till both valves are closed on the 1 cylinder but is there a more precise way of getting valve timing correct?

does it even sound like i sorta know what i'm trying to ask here?

clubracergt1 · 02-23-2009, 07:34 PM

What year Exploder? Get me your email addy and I will see what I can get you.

Pesce Nero · 02-23-2009, 08:02 PM

Quote:

Originally Posted by clubracergt1

What year Exploder? Get me your email addy and I will see what I can get you.

about to send you a pm

Darryl Buckner · 02-24-2009, 10:42 AM

I was under the understanding that the over head cam Ford motors like that were interference motors. So if they turned it over and the timing wasn't fairly close, there are probably some bent valves. Not familiar with the 4.0, but the 4.6 32 and 16 valve motors, you will bend valves if they are not correct. You might want to send Gerald a PM, he timed the 32 valve motor when Jeff rebuilt it for the mach 1...

clubracergt1 · 02-24-2009, 12:06 PM

You are correct, Darryl. The 4.0 SUCK is a valve bender. You usually know right away, though, if that happened. Worked at a shop where somebody got it way wrong, once.

KRYPTONITE · 02-24-2009, 01:24 PM

Quote:

Originally Posted by SIXPACKGUT

truck belongs to girl i work with. her boyfriend tried changing timing chain and tensioner. he put it back together. wont start or run.

they asked my advise, i asked if they have valve timing correct. i dont think they do. went and looked at this mess today and i would like to know how you figure out where valve timing is in relation to the crank. there is a shaft that runs thru the engine and somehow, if you take the bolt out of the cam sprocket(not really cam sproket but shaft sprocket i guess) it will free wheel.

i figure your supposed to set the engine on TDC before you start this job and everything turns out fine but if that didnt happen, then what?

guess i can spin the valve gear till both valves are closed on the 1 cylinder but is there a more precise way of getting valve timing correct?

does it even sound like i sorta know what i'm trying to ask here?

I would do a compression test first before anything

KRYPTONITE · 02-24-2009, 01:29 PM

Quote:

Originally Posted by SIXPACKGUT

truck belongs to girl i work with. her boyfriend tried changing timing chain and tensioner. he put it back together. wont start or run.

they asked my advise, i asked if they have valve timing correct. i dont think they do. went and looked at this mess today and i would like to know how you figure out where valve timing is in relation to the crank. there is a shaft that runs thru the engine and somehow, if you take the bolt out of the cam sprocket(not really cam sproket but shaft sprocket i guess) it will free wheel.

i figure your supposed to set the engine on TDC before you start this job and everything turns out fine but if that didnt happen, then what?

guess i can spin the valve gear till both valves are closed on the 1 cylinder but is there a more precise way of getting valve timing correct?

does it even sound like i sorta know what i'm trying to ask here?

On the 4.0l it takes a special procedure, and also a special tool to line everything up, this is a cridical procedure if not really mech. inclined probally bent some valves, call me and i will get you the procedure if you want

Robert Holton · 02-24-2009, 01:43 PM

Quote:

Originally Posted by KRYPTONITE

On the 4.0l it takes a special procedure, and also a special tool to line everything up, this is a cridical procedure if not really mech. inclined probally bent some valves, call me and i will get you the procedure if you want

who signed on under marcus's screen name, i know marcus didnt say sumthing that actually made since

KRYPTONITE · 02-24-2009, 01:48 PM

Quote:

Originally Posted by SupermanMotorsports

who signed on under marcus's screen name, i know marcus didnt say sumthing that actually made since

done a few here and there but,not to hurt your feelings but ford didnt make the best motors and they are a pain to work on,

Robert Holton · 02-24-2009, 02:38 PM

Quote:

Originally Posted by KRYPTONITE

done a few here and there but,not to hurt your feelings but ford didnt make the best motors and they are a pain to work on,

not hurting my feelings, i agree 100%

clubracergt1 · 02-24-2009, 03:09 PM

Already sent him the procedure, this morning. May need help locating the tools, though.

Darryl Buckner · 02-24-2009, 03:47 PM

If they are the same tools, I have the Ford cam tools for the 32 and 16 valve 4.6...

Pesce Nero · 02-24-2009, 07:45 PM

thanks guys, but i didnt mess it up so i'm not going to worry about it

02-23-2009, 06:18 PM	#1
Pesce Nero Senior Member Join Date: Jul 2008 Posts: 2,680	4.0 sohc explorer engine truck belongs to girl i work with. her boyfriend tried changing timing chain and tensioner. he put it back together. wont start or run. they asked my advise, i asked if they have valve timing correct. i dont think they do. went and looked at this mess today and i would like to know how you figure out where valve timing is in relation to the crank. there is a shaft that runs thru the engine and somehow, if you take the bolt out of the cam sprocket(not really cam sproket but shaft sprocket i guess) it will free wheel. i figure your supposed to set the engine on TDC before you start this job and everything turns out fine but if that didnt happen, then what? guess i can spin the valve gear till both valves are closed on the 1 cylinder but is there a more precise way of getting valve timing correct? does it even sound like i sorta know what i'm trying to ask here?

02-23-2009, 07:34 PM	#2
clubracergt1 Senior Member Join Date: Feb 2007 Location: The Great, white North (Chicagoland) Posts: 2,483	What year Exploder? Get me your email addy and I will see what I can get you. __________________ This space for rent

02-24-2009, 10:42 AM	#4
Darryl Buckner The Top Dog Join Date: Dec 2007 Posts: 2,318	I was under the understanding that the over head cam Ford motors like that were interference motors. So if they turned it over and the timing wasn't fairly close, there are probably some bent valves. Not familiar with the 4.0, but the 4.6 32 and 16 valve motors, you will bend valves if they are not correct. You might want to send Gerald a PM, he timed the 32 valve motor when Jeff rebuilt it for the mach 1... __________________ When the people fear the government, there is tyranny. When the government fears the people, there is liberty. Thomas Jefferson

02-24-2009, 12:06 PM	#5
clubracergt1 Senior Member Join Date: Feb 2007 Location: The Great, white North (Chicagoland) Posts: 2,483	You are correct, Darryl. The 4.0 SUCK is a valve bender. You usually know right away, though, if that happened. Worked at a shop where somebody got it way wrong, once. __________________ This space for rent

02-24-2009, 03:09 PM	#11
clubracergt1 Senior Member Join Date: Feb 2007 Location: The Great, white North (Chicagoland) Posts: 2,483	Already sent him the procedure, this morning. May need help locating the tools, though. __________________ This space for rent

02-24-2009, 03:47 PM	#12
Darryl Buckner The Top Dog Join Date: Dec 2007 Posts: 2,318	If they are the same tools, I have the Ford cam tools for the 32 and 16 valve 4.6... __________________ When the people fear the government, there is tyranny. When the government fears the people, there is liberty. Thomas Jefferson

02-24-2009, 07:45 PM	#13
Pesce Nero Senior Member Join Date: Jul 2008 Posts: 2,680	thanks guys, but i didnt mess it up so i'm not going to worry about it