Hose from waterpump passing under intake manifold

sam1drake · #1 04-26-2007, 04:19 PM

The hose just blew at the point where it attaches to the back of the water pump. It disappears out of sight going toward the rear under the intake manifold. I assume this is a heater hose. But how do you change it? Where does it come out at the back of the engine. Can it be changed without removing the intake manifold? My haynes manuel is useless on this.

way2old · #2 04-26-2007, 05:40 PM

Yes you can change it without removing the intake. It comes out on the passenger side rear of the motor. The hose is bolted to the head with a bracket. There is not a lot of room to get the hose out or in, but it can be done. Or you can remove the bolt from the head, pull the metal pipe up as far as you can get it and cut the pipe. Then cut a piece of heater hose to connect the pipe to the water pump. You just have to be careful the long piece of heater hose does not rub the hot block and cause another leak. Removing the wiper module housing will give a little more room to wiggle the hose in and out. Good luck.

sam1drake · #3 04-26-2007, 06:02 PM

Thanks way2old. that would be a good handle for me. I am way too old for this job but it is necessary. Now that I have found the bracket (with your help) on the rear I maybe can get the tube forward enough to be able to cut it and get a new piece of hose on there with a good clamp.

But it still looks to be a challenge. Do you see anything wrong with just bypassing all that metal tube by snaking a long hose straight up in the front ( might need a 90 degree elbo to avoid kinking and then a coupling to a long straight hose) and over the top along the valve cover back to the firewall heater hose connection and just bypass the hose. It won't look particularly nice but I don't care how it looks if it will be servicable. I will have to put the generator back in to see if there is enough clearance for a hose to come up out of there.

sheebeehuh · #4 04-26-2007, 06:06 PM

The 3rd pic down at the link below shows the hose (with the intake manifold removed of course)...

http://www.autoclinix.com/Manifold5.htm

It can indeed be replaced without removing the intake. It's a PITA but it can be done. There are some instructions here...

http://www.lincolnsonline.com/tech/00028.html

...

way2old · #5 04-26-2007, 07:52 PM

You can bypass the entire metal pipe with a rubber hose. You just have to be careful where it will lay against the block. That could cause the new repair to eventually leak. If you wanna borrow parts of the moniker way2old, it is ok by me. Just leave mine intact.

Good post sheebeehuh

sam1drake · #6 04-26-2007, 08:02 PM

I just learned from the local Mercury dealer that the complete assembly is not available. Their fix is to cut the tube at the hose crimp and use a cut length of 3/4" hose with clamps. BTW my car is a 96 grand Marquis. I suspect there is a source for the tube but I am persuing the "cut the crimp and put on new hose" method. So far it definitly is a PITA. I now have everything lose at the back hoping to pull the tube forward enough to make it easier to cut but it doesn't seem to have any room to wiggle forward. Perhaps if I bend the mounting tabs a certain way i can get it forward. I need another inch or so in order to be able to get to it without removing the intake manifold. The struggle continues but thanks for all the input. I couldn't have begun without help from you. The picture in the manifold removal link perhaps will aid me in figuring out how to wiggle things.

I may still try to just feed a hose out the front and over the top to the rear. this whole thing will have to be done again someday so I would rather have it be simply to remove the alternator replace the hose and reinstall the alternator. I will do at least one more post just to let anyone interested how this job turned out.

sam1drake · #7 04-26-2007, 08:16 PM

With regard to bypassing the metal tubing, I can see that the new hose would probably spring a leak down there in that hot tunnel where it rubs on the block. What do you think of the idea of providing a protective sheath by running the hose through a larger hose? I did that with a troublesome diesel fuel line once and it solved the problem. In this case it would require perhaps as much as 1.25" dia hose. There may not be room enough for that. Any one know? any other thoughts on how to make this thing more servicable?

auto trainy · #8 04-27-2007, 07:42 PM

I think your idea of bringing it up from the front is good and you could probably find a 3/4 " preformed heater hose to come out clean and then get an inline nipple and continue to the rear with a length of 3/4" hose,good luck

sam1drake · #9 04-28-2007, 01:17 AM

Auto trainy, you are right. I had already done all the work to loosen the tube mounting at the rear of the engine so I finished up by putting some Gates greenstripe hose over the existing tube after cutting off the crimped on hose at the front end with a dremel. But I was curious so I did a quick test hookup with a hose doing as you suggested with the elbo and coupling. It had plenty of room to exit behind the alternator. BTW the hose is 5/8" and not 3/4" as the Mercury dealer stated after looking it up in his books.

But it was all a loss I guess. The car is getting water in one of the cylinders. Something happened to the head or the head gasket when she overheated as a result of the hose failing. If it is a head gasket I guess I will try replacing it. But if it is the head I may have to give up on this car.

Any quick tips on taking a head on and off. I have already changed a manifold on one of these cars. The valve cover and head is next after i figure out which one is messed up.

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