4.0 pushrod coolant leak

[EB4X]

OLD THREAD .....DPDISXR4Ti was inquiring about swapping out a 2.9 for a 4.0 and coolant / intake setups.
(P.S. I had another 4.0 ohv (Ranger) which I slightly overheated and didn't harm / affect heads or h. gaskets what so ever.... sold it running great just shy of 258,000 without ever needing to take engine apart for anything - only sold it to get my current 4.0 ohv 4WD....these engines are not cracking heads left and right)

 

[fast_dave]

I don't currently have a vehicle with the 4.0 OHV engine, but rather it's predecessor, the 2.9, which does not have coolant routed through the intake manifold. I'm considering a 4L swap, but in the interest of plumbing simplification and reliability, I'd want to continue with a "dry" intake. I can't find anywhere that this has been discussed. Is it possible? Has anyone actually done it?

@DPDISXR4Ti

This is a re-hash of what you already know, but for anyone else; The 4.0 OHV lower aluminum intake takes the thermostat on the front, and uses the front two water passages on the lower aluminum intake to interconnect with the heads. The two rear water passages are blocked off.

This/Yours is the first question I've ever read concerning this "backwards" swap to putting a 2.9 lower intake on a 4.0

Although we have a huge braintrust here, the only guys I think of that can possibly help you out are over at The Ranger Station website.

They do all sorts of crazy mods to the Cologne Germany OHV V-6, the 3.0 and 4.0 AND they do have a 2.9 Forum (LINK BELOW).

LINK: 2.9 Liter Forum

Hope that helps & good luck!

 

[DPDISXR4Ti]

@DPDISXR4Ti
Although we have a huge braintrust here, the only guys I think of that can possibly help you out are over at The Ranger Station website.

Yep, already on there, but thanks. I'm finding it's probably best to just stick with the 4.0 stuff overall and not get too crazy creating a FrankenCologne.

 

[fast_dave]

@DPDISXR4Ti

Yeah, a lot have water has gone under the bridge since the introduction of these engines, and if you haven't seen a write-up or YouTube video on the subject, there's probably a reason

You know, for sheets & giggles, you could always try and contact Tom Moran @ Moran Motorsports | Professional Drag Racing Products and Services and ask him if it's been tried.

Let us know if you find anything out!