A couple more efi 5.8 questions

[4x4man514]

R guest3, I was looking to get those same valve covers you have, did the filler neck have that small port on it or did you have to modify them? I was looking at the pics on the summit site and I couldn't see that nipple on it.

 

[rguest3]

Other than being painted, those valve covers are not modified at all.

 

[4x4man514]

Thanks. One more question. Are you running roller rockers? Do you know if they clear with those vcs?

 

[rguest3]

Full roller will not. Roller tip magnum rollers will. 1442-16 if I remember correctly.

 

[4x4man514]

Great. I run into one issue after another. At least I found out before I bought some. I really liked the way those looked too. Anyone have any suggestions for efi and full roller rockers?

 

[4x4man514]

R guest Do you think they would fit with the baffle plates removed?

 

[rguest3]

Maybe. But I did not want to remove them.

 

[4x4man514]

Right I understand. I wouldn't either. But so far I have not found one set that would fit roller rockers and have the fill cap in the right place. I can't believe this is such a rare thing! It's ridiculous.

If the oil cap was sealed shut and there was no breather would it really matter if there was a baffle there or not?

 

[mattt]

It depends which roller rockers you plan to run. I am using the same cast aluminum, finned valve covers and they fit over my Harland Sharp shaft mounted roller rockers.

4x4man....do you have rockers and valve covers already? Have you test fit them? As for the vacuum ports, hoses, etc...the only ones you must have are for PCV and the fuel regulator. I saw in another thread, you are trying to decide which fuel rails to go with. I can tell you this....in order for the upper manifold to clear the fuel pressure regulator, the throttle body and fuel pressure regulator MUST be on the same side, unless you're willing to run an intake manifold spacer between upper and lower.

As far as I know, ALL 351 5.8L factory fuel rails have drivers side mounted fuel pressure regulator....at least everyone I've ever seen does. You can run with throttle body facing drivers side, but it is not the conventional way to do it. I did it that way, but it's a tight fit. The only fuel rail I've seen with passenger side regulator are 5.0's so you have to lengthen the cross over hoses on the fuel rail to use on a 5.8. Your best bet is to collect all the parts you will need and then start test fitting everything together that you'd like to use. The problems will become apparent and that is how you start working thru them. Ask me how I know......

 

[4x4man514]

Thanks Matt. Yea I'm figuring out what your talking about now. I am going to put the Tb on the passenger side . And I recently learned what you are saying about the regulator. So I was gonna find an explorer fuel rail and find some way to lengthen the hoses connecting the rails. As for pcv ,from everything I've read, I was going to run the pcv in from the intake port in the rear of the intake. Connected to the two ports on the upper.

It was at this point I realized my oil filler neck was conflicting with my upper and needed new valve covers.right now I have the bronco script valve covers and they clear the rocker arms fine but the oil neck and breather holes are all wrong. I have crowder roller rockers I'm guessing not much different from your Harland sharps clearance wise. I have a 1 inch spacer on the upper so there shouldn't be an issue there.

And I haven't even gotten to the throttle body brackets yet!

 

[4x4man514]

Ok guys. So now I have some different valve covers on the way , and some heater tubes. I got my explorer lines in and now realize this crossover coolant line is in the way . How important is this? One issue after the next! Lol.

 

[Viperwolf1]

Ok guys. So now I have some different valve covers on the way , and some heater tubes. I got my explorer lines in and now realize this crossover coolant line is in the way . How important is this? One issue after the next! Lol.

It's a good thing to keep if you're using the ECT sensor in the heater tube. It circulates coolant through the tubes even when the heater valve is turned off. That lets the sensor get a more accurate estimate of the temp.

 

[mattt]

crossover coolant line? Are you talking about an added hose from one back corner of the intake manifold to the other side back corner?

Not seeing how that would circulate coolant thru the tubes with the heater off?

 

[4x4man514]

It is
From one back corner to another

 

[Viperwolf1]

crossover coolant line? Are you talking about an added hose from one back corner of the intake manifold to the other side back corner?

Not seeing how that would circulate coolant thru the tubes with the heater off?

I might be mistaken but I thought he was asking about the short section of rubber hose between the heater tubes on the '96-'97 explorer.

Ok. Nevermind. Not very important. I tried it for a while and it didn't make any measurable difference.

 

[4x4man514]

I can prolly keep it Easy enough as long as there is no shortage of room between the firewall and the motor.

 

[4x4man514]

Man thank you guys so much. I'm am leRning a ton and I couldn't do it without you.

 

[4x4man514]

Forgive me guys. These late night posts seem to involve me drinking as well. Lol! The back two corners of the manifold is what I was referring to.

 

[4x4man514]

So y'all are saying I don't need that rear hose? I just need to plug the holes? Sorry for the confusion last night.

 

[DirtDonk]

Have we seen a pic of this hose yet?
While a coolant crossover might not be a requirement in all cases, I'd say if it's already there, to leave it if you can.
The stock older, and most newer 5.8's don't seem to have the same trouble with overheating due to steam pockets in the back of the heads that the modified older engines did, but that doesn't mean you should not take advantage of an old racers trick to let the coolant flow to those areas more efficiently.

At least I'm guessing this is what you all are talking about. If not, then ignore what I just said. But if that's what it is, and your engine has been bored out at all, then I'd at least attempt to keep the crossover tube in the build if you can.
Seems like cheap insurance...

Paul