Question about 1997 Mitsubishi Montero Sport

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Water leak below intake in the valley - 1997 Mitsubishi Montero Sport

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Unless you are sure that the coolant isn't being blown from elsewhere, this typically comes from a failed water pump seal.

Posted on Oct 04, 2009

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Posted on Jan 02, 2017

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2 Answers

On a 1998 ford F150 is there such a thing as valley hose connected to the heater hose system yes or no?


Is you rotor a 4.6 if so Theres a bypass tube under the black nylon intake manifold it has a rubber hose on the end behind tell water pump you must remove the manifold to fix it

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Using antifreeze but no sign of leakage on 2006 sienna


After it warms up check exhaust for steam. Probably head gasket leaking into the exhaust.

Sep 14, 2014 | 2006 Toyota Sienna

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Water leak by the front of the transmision


I had the same symptom and it turned out to be the small metal tube ($5 part) off the back of the water pump that feeds the coolant line that lays in the valley under the intake plenum. When the valley fills with coolant/water it spills off the back of the motor down the front of the trans. To fix the problem you need to remove the entire intake, fuel rails and plenum (took me 2 days to R&R plus acquire the parts) to get to the problem. I suggest you replace the water pump at the same time while you're in there. Not a hard job just lots of bending over wrenching. The shop wanted $1500, I had $500 into parts including plugs, alternater, water pump, belts, coolant and hoses. Good luck.

Jan 26, 2013 | 2000 Ford Expedition

1 Answer

I cant locate the knock sensor where do i find it?


There are 2 knock sensors located below the upper intake manifold. With the intake removed follow wires to the middle of engine near the front and back. The sensors are recessed in the lower valley pan and covered by some type of insulating material. The rear sensor usually fails due to water working past the insulating material and filling the hole with water and covering the sensor, causing it to rust. Remember to replace the upper intake gaskets and injector o-rings. You dont want any other driveabiliy issues after this repair.

Mar 25, 2012 | 2001 Chevrolet Suburban

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Where are all the freeze plug located on 4.6 w/auto. is there one between the block & transmission


Yes, there are expansion plugs (freeze plugs) on both sides of the engine block and at the rear of the engine block between the engine and transmission. There are also a couple in the ends of the cylinder heads.

With all that said, I would like to add that many times with that engine, the heater tube and connecting hoses can leak and be mistaken for a rear expansion plug leaking. I would definately check this before pulling the transmission out.

There is a tube that runs from the back of the water pump under the intake manifold and out the rear of the engine where it hooks up to the heater hose/heater core. This tube has a small hose connecting it to the back of the water pump. There is also a hole in the back of the engine block that will allow antifreeze from under the intake manifold to leak into the transmission bell housing area. When this tube or hose leaks, it often gets mistaken for a leaking rear expansion plug.

It is very easy to check for this. Remove the serpentine belt and remove the alternator and look under the intake manifold down in the "valley" between the cylinder heads. If there is antifreeze in there, the hose or the tube is leaking. Look at the picture below. Item #3 is the tube and hose assembly I am talking about. Usually, just the hose is leaking. It should be replaced with a short piece of SILICONE heater hose. On some of the vehicles, there are 2 hose clamps. On others, the end of the hose that is attached to the tube has a crimped collar on it. If yours is like this, you can fix it by carefully cutting the crimp collar off and replacing the hose using band clamps. (screw-type)

Also look for antifreeze leaking into this area from the front intake manifold runner. They tend to leak on the front runner near where the thermostat housing is located. These will also leak into the valley area and run out the back of the engine. If the manifold is leaking, chances are it is warped. DORMAN makes a replacement intake manifold kit just for this purpose because it has been so common. It is also very easy to check for this with the alternator removed.
The DORMAN part number for your vehicle is 615-178 (See second picture below)


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Sep 21, 2011 | 1996 Ford Mustang

1 Answer

1995 Diamanti 3.0 dual overhead cams. I have a coolant leak in the valley underneath the intake manifold. I resealed the orings on the pipe from the waterpump to the thermostate housing but it is leaking...


i know you did the O rings,but did you also use a non setting head gasket sealer around the edges?as this makes sure they are waterproof....for good.(red hermatite in the uk)

Aug 20, 2010 | 1995 Mitsubishi Diamante

1 Answer

Radiator is leaking under the intake where the


you must have a 3.0 v6 engine,
if you do and you see coolant laying on the pan under the intake,best bets are the round pipe you see in between the pan and intake,there are rubber O rings on the pipe in the rear that get hard and crack and leak,

Nov 22, 2009 | 1995 Dodge Spirit

3 Answers

I OWN A 1990 TOYOTA CAMRY V6. MY QUESTION IS: WHY


If you are loosing coolant, but you have no leak, then there are not but 2 ways that can happen. #1 your coolant is getting into your oil. Check by taking off the oil fill cap, examine the color of the residue on the cap and inside the engine. If your oil has water in it, it will take on a milky appearance. You can also pull your dipstick and verify your findings on the end of the dipstick. #2. You can be loosing water in your exhaust. You may notice a vapor coming from your exhaust pipe, water may be dripping from its termination, and you should be able to hold your hand 3 or 4 inches from the exhaust and your hand will get water droplets forming on it. Both of these conditions can be caused by either a blown head gasket, or a crack in the head itself. Hope this helps! Good Luck.

Oct 18, 2009 | 1990 Toyota Camry

4 Answers

Water leak next to block behind water pump.


i have a 1999 ford explorer v8 5.0 and it is leaking right behind the waterpump. but not from the pump, about 5 inches behind the pump, like by the block, what is it?

Apr 25, 2009 | Ford F-150 Cars & Trucks

1 Answer

1996 lincoln towncar


If you have a pipe leaking you need to replace it. Only onei can think of thats close to intake is the In/out to heater matrix.

But if its leaking from waterpump it need a new gasket.


Oct 13, 2008 | 1996 Lincoln Town Car

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