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I recently replaced a my upper & lower radiator hoses, heater hoses, thermostat and fan switch in an effort to stop random leaks... no dice is the current leak seems to be coming from under the intake manifold is there a coolant line under there or between the intake manifold and block some where I dunno and I cant keep coolant in my car at all. please help!!
 

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There is a bypass hose that comes from under the intake to the thermo. housing. It was a bitch to access without pulling the upper intake. I got lucky and where the hose was bad it was kinda easy to repair. I used a flared length of brake line to bridge the hoses where the leak was. I did mine over 5 years ago and no issues. To determine location of leak, remove the intake tube and run hand along and under intake; you'll find it. But it can be a PITA to do. Also check condition of the hoses that run to the oil cooler and heater core.
 

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Did you replace the the hose that goes to the oil cooler in the back? Mine blew on me last year. If you jack the car up and crawl underneath, you can see what's going on if look at it from the back.
 

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On the1.9L engines the intake manifold doesnt have any coolant flowing through it, but in the engine head there are two openings into the water jacket - that the intake manifold gasket (backed up by the manifold) close off. One of the openings is between the 2nd and 3rd intake pipes. The other one is under the throttle body end of the manifold.
With a 12mm or 13mm socket on an extension you can undo that manifold, and slide it back a little bit. At least enough to have it pivot up a little, so you can clean off the surface of the head and the manifold, and install a new intake manifold gasket. If its been leaking for a while there will be enough crud from the process that it will take some time to get the surfaces (of the head around the openings into the water jacket, and the opposing surfaces of the intkae manifold) cleaned up and flat enough.
I like to put a thin smear of a gasket maker (RTV silicone stuff) around those two openings on the engine head, to help seal any leaks.

Also there are two places that can leak in the engine block itself. Below the intake manifold there are two core plugs. These may begin to leak after enough time - especially if the coolant never gets changed. They seldom seem to leak in Escorts, so hopefully that wont be the leakage. (With the engine in the car, the core plugs are tricky to get removed and new ones installed - though Im sure it is possible.)

And of course the lower radiator hose - where it fits onto the front inlet of the water pump - is tough to reach. I wind up taking off the serp. belt tensioner to get to that hose. Sometimes I have to remove the alternator and p.s. pump to get a new hose pushed on properly.
 

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theres a bgger hoes from block to heater core firewall area , theres 2 coolant hoses under the intake . its connected to the fast idle thermo valve , and theres a freeze plug in the back ... ill bet that its the thermo valve hoses they always pop . get really long needle nosed plyers
 

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I just had to replace the hose that runs from the back of the block to the oil cooler. major PITA. Instead of getting a molded hose that runs along the block, I just used bulk hose and went around the intake manifold/plenum brace. Should help the hose last longer as it's away from the block.
 

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I did the same, but mostly because I couldn't find anyone who made that molded hose. Are they out there? I agree about keeping it away from the block, plus it gives a little bit more capacity. I did say little.....
 

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At www.rockauto.com they show several molded hoses, if you go into the listing for the 1.8l engines - click on 'cooling system' and then on 'coolant hose'. You put in the make, year, and model of your car, then click on 'cooling system', then on 'coolant hose'. They show the radiator hoses of course and some 5/8" molded hoses. You can click on the tiny image of the part, and it enlarges. I have ordered a lot from them - rebuilt two 1.9l engines and an auto tranny with parts from them. They ship via Fedex and UPS - usually takes 3 to 5 days to arrive.
 

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denisond3 said:
On the1.9L engines the intake manifold doesnt have any coolant flowing through it, but in the engine head there are two openings into the water jacket - that the intake manifold gasket (backed up by the manifold) close off. One of the openings is between the 2nd and 3rd intake pipes. The other one is under the throttle body end of the manifold.
Ah, wrong section there buddy. This is the GT section.
 

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BOSS302man said:
That looks like something I should have!
It's one of those tools you don't use much, but sure is nice to have when you need it. I've been wanting one for a while, so I finally picked one up.
It's how I found out it was the water pump that was leaking.
 

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i think the only place to get the molded hose, is to get it straight from mazda.
 

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silverton said:
i think the only place to get the molded hose, is to get it straight from mazda.
+1 when i replaced it ford said it was discontinued. mazda still had it though :)
 

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Discussion Starter #17
I think I may have found the leak, it seems to be coming from the intake manifold it was strange I could hear coolant boiling in the overflow and the coolant just pouring out of the leaky area. could the head be cracked or would a failed intake manifold gasket cause the leak? :dumb:
 

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Check for a small dia. hose which runs from under intake to a metal tube to the thermo. housing. Like I posted before,... remove intake tube and inspect the area for leak.
 

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Discussion Starter #20
Well, I'd like to thank everyone for there helpful and swift response to my questions. black93lxe, you were right it was that little rinky-dink hose bleeding all over the place. I had no Idea that much coolant was going through there haha cost me a Buck to fix :lol:
 
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