Loss of coolant, possibilities?

[PrestigeWorldwide]

Are you sure you got the right intake replacement? If the old one is identical, which I doubt, something's got to hold them on the other side. Is it possible you've got a different Year engine in your SUV?


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I didn't replace the intake, it had previously been replaced before I acquired the truck.

On the manifold it gives me the part # for the replacement gasket set, comes with no orings. But if I look up the manifold itself, the pictures show 1 small oring.

 

[PrestigeWorldwide]

Here is the back passenger side of the head. The small circle behind the water passage.

 

[PrestigeWorldwide]

Now here is the intake side. Unless the previous owner had the wrong one installed, or I'm a moron (which is entirely possible), I don't see anywhere for an oring to go.

 

[1955moose]

Sorry I read again and saw that. I'm wondering if that's why your having these issues with your cooling system. How long has that manifold been on there. I'm not there to see it, but it would make sense if o rings are part of the sealing process, they would have to be there, or their would be a leak. You might want to look into finding the right manifold. I'm sure one of the others will comment.


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[PrestigeWorldwide]

Sorry I read again and saw that. I'm wondering if that's why your having these issues with your cooling system. How long has that manifold been on there. I'm not there to see it, but it would make sense if o rings are part of the sealing process, they would have to be there, or their would be a leak. You might want to look into finding the right manifold. I'm sure one of the others will comment.


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It's been on the truck well before I had it. I've double and triple checked the part number for the manifold, it's correct for my truck. When I set the manifold in place, it doesn't even cover that hole.

 

[1955moose]

Again I'm not there, you might want to pick the brains of your local shops, and maybe the dealer. Ask them. Would be great if dealer had one to look at, or maybe they or one of the shops has one apart to look at. Anybody else want to comment.


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[PrestigeWorldwide]

Ok. Got it figured out after talking with some guys that used to put these motors together for Ford. The 5.4 heads are technically a "one size fits all," meaning that each side is interchangeable with the other. So if I were to swap the passenger side head with the drivers side, that port that's not being covered would be under the thermostat housing. The only difference being it would not have been drilled completely through. They only used one casting for the 5.4 heads. So that hole in the back of the passenger head is just unused and not drilled through.

 

[1955moose]

Good, glad you figured it out. Guess you got to get a single o ring for the thermostat housing. Maybe that's the one in the picture you were talking about.


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[PrestigeWorldwide]

Good, glad you figured it out. Guess you got to get a single o ring for the thermostat housing. Maybe that's the one in the picture you were talking about.


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But I don't think that oring was supposed to be there. The manifold gasket already seals that. I think that extra o ring may have been part of the problem.

 

[1955moose]

Could be. If it was meant to have a o ring, the part would be notched out for it. Sounds like the past owner, or mechanic did a no no. Well you'll find out soon enough.


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[docraymund]

Could have been your engine block was made in a different plant. There are 2, Windsor and Romeo. There are minor differences between them even with the same model year.

 

[1955moose]

Would be nice for those like our op, if they printed something on package stating heads are reversible, don't use passages on this side, or leave empty. That would be too easy.


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[PrestigeWorldwide]

Would be nice for those like our op, if they printed something on package stating heads are reversible, don't use passages on this side, or leave empty. That would be too easy.


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Would seem like the most sensible thing to do.

 

[hartsemperfi]

Did you ever find your leak? The actual crack or bad part of the gasket? I removed my intake had a pool of antifreeze in the V but hadnt quite found the absolute issue. Do the bypass pipe go bad?

 

[1955moose]

His might have been the o ring that was put in under the thermostat housing that didn't belong there.


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[PrestigeWorldwide]

Did you ever find your leak? The actual crack or bad part of the gasket? I removed my intake had a pool of antifreeze in the V but hadnt quite found the absolute issue. Do the bypass pipe go bad?

I didn't see anything out of the ordinary other than the oring inside the normal gasket. I had coolant pooling up on cylinder 1 along with a cylinder 1 random miss. However, I broke my intake torquing it down today even though I was at the low threshold of the torque value. So no results or news as of yet unfortunately.

Does yours still have the plastic crossover?

 

[1955moose]

Got to love that made anywhere but U.S. Quality. It's like your tv and every thing else we own, replace it don't fix it, arg!


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[1955moose]

I know this might be a stupid question, but you did torque it from inside to out?


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[PrestigeWorldwide]

Got to love that made anywhere but U.S. Quality. It's like your tv and every thing else we own, replace it don't fix it, arg!


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Actually according to Dorman they are made in America. Or at least that's what's stamped on the intake.

I know this might be a stupid question, but you did torque it from inside to out?


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I did. Followed the torque sequence, starting with the middle, and moving cross cross to the outside. The only issue I can think of, is that you have to use an extension on the torque wrench, which I would think may throw the torque value off. Just a theory though. Or maybe the Dorman intake used a different sequence, since it has integrated gaskets for each port, not 2 solid gaskets for each side, but I couldn't locate any literature on this.

 

[1955moose]

How tight did you tighten intake bolts? The ones from intake to the head, should be 18 foot lbs, done in at least 3 steps. The intake manifold plenum to intake manifold is 8.3 foot pounds, or 100 inch pounds. Using an extension on the end of the 1/2 inch square of your torque wrench, actually decreases the torque being applied to the socket. The only way you increase torque, would be if you lengthened the bar itself, by adding a pipe or similar to it. If your torque wrench is fairly accurate and you had it set at 18 foot pounds, you did nothing wrong.


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