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Radiator is leaking on the side of the valve - Cars & Trucks

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Sounds like the the radiator is cracked by the valve and you need to replace the Radiator and that should take care of the leak

Posted on Dec 01, 2016

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Posted on Jan 02, 2017

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Possibility of a cracked block. how can i be sure/


Vehicles: Any with the above symptoms

A cracked cylinder block will cause either:
(a) motor oil contamination of engine coolant
(b) coolant contamination of motor oil
(c) white exhaust smoke, due to coolant seeping into one or more cylinders.
(d) more than one of the above
(e) all of the above

Oil infiltrating into coolant is easy to see - drain some coolant out through the pepcock at the bottom of the radiator, and place it into a styrofoam coffee cup. Oil droplets floating on top of the green (or orange) coolant are easily seen. Or visualize oil by looking into the top of the radiator through the radiator cap.
Coolant infiltrating into and mixing with motor oil will permanently damage the engine (seizing it up through loss of lubrication), and must be prevented.
A leak from above the front suspension is, as physicians like to put it, "nonspecific", with the most likely cause a water pump seal or hose/hose connection.
A leak from near the fire wall will usually be a heater core hose, or hose connection.
A coolant leak on the same side of the engine as the water pump is a leaking water pump or water pump seal until proven otherwise.

To rule out everythng else, here's the 1999 Honda CR-V Troubleshooting Guide for Coolant Loss/Coolant Leaking:

Priority Action Part Type Cause
1 Inspect Water Pump - Worn, Cracked or Leaking Water Pump, or Water Pump gasket.
2 Inspect Head Gasket - Leaking Head Gasket.
3 Inspect Radiator - Leaking Radiator Hose(s).
4 Inspect Radiator Cap - Worn or Damaged Radiator Cap.
5 Inspect Radiator Hose - Ruptured, Cracked or Leaking Radiator Hose.
6 Inspect Freeze Plug - Leaking Freeze Plug(s).
7 Inspect Intake Manifold Gasket - Leaking, Worn, or Damaged Intake Manifold Gasket.
8 Inspect Water Outlet - Cracked, Leaking or Damaged Water Outlet.
9 Inspect Heater Control Valve - Leaking or Faulty Heater Control Valve.
10 Inspect Radiator Drain Pepcock - Loose, Damaged, or Faulty Radiator Drain Pepcock, or Pepcock O-ring.
11 Inspect Engine (DOMESTIC ONLY) - Cracked Cylinder Block Leaking Coolant into at least one Cylinder, causing white exhaust smoke.

Dec 03, 2011 | 1999 Honda CR-V

1 Answer

What would cause a 2004 Dodge Caravan to leak engine coolant from both sides of the radiator and causes smoke on the driver side near the coolant reservoir?


Hi,
Seems the smoke is the hot steam from the coolant. That escapes from your radiator. The culprit would be the radiator cap. The coolant when your engine is hot, goes to your coolant reservoir, and it( coolant ) should go back to the radiator when your engine cools down.
The coolant failed to go back to the radiator because the radiator rubber seal is already broken and suppose to **** the coolant from the reservoir. Coolant also escapes from the radiator, thats why you see some coolant from both sides of your radiator. The heat inside the radiator expands the coolant and the only course is through some crack seals.
Radiator cap have pressure rating that opens its valve in a certain pressure.
Hope that helps you out!
Thanks for seeking help from FixYa!

Jun 23, 2011 | 2004 Dodge Caravan

2 Answers

Overheating pontiac montana shooting out cold air from heater


Get the radiator and heater core, hoses and thermostat replaced. Also replace the mixing valve if needed. A radiator shop could give you an estimate and diagnose the problem better than I can online. I hope sincerly that this helps.

Mar 16, 2011 | 2003 Pontiac Montana

1 Answer

I have a 1998 mustang. After i drive it I have noticed smoke coming from under the hood on the passenger side What could be the problem


You could have condensation from the A/C lines, if the problem does not happen when the A/C is off, its a good bet. Look at where your exhaust parts are relative to the A/C lines.

Leaks of oil or antifreeze. The valve covers can loosen up over time. You should be able to observe staining on the exhaust manifold directly under the bottom lip of the valve covers. Lightly tighten the valve covers or replace the valve cover gaskets.

Antifreeze. A pressure gauge is made to test the Radiator, Radiator cap, and the overall system. You may be able to rent one or use one free from Autozone, Oreillys, Advance, or local parts stores. A radiator shop would definitely have one. A failing Radiator can seep and evaporate the Antifreeze with none falling on the ground. You could have a loose hose clamp or even a heater core leaking(its on the passenger side).

Check for any loose wires or vacuum hoses which may have dropped onto hot pipes. That's about all the possibilities. I hope my Solution is very helpful to you. There is just no one thing alone that is always the problem. You are going to have to check out all the things on my list to find the right one. Thanks for using Fixya.

Dec 04, 2010 | 1998 Ford Mustang

1 Answer

Leaking Radiator


you can try tightening it first but yes it just has an o ring around it that is easily purchased at any auto parts and easy to install but antifreeze will have to come out,or you also can buy a whole other drain plug and try to remove and replace it fast as not to loose much coolant with out having to drain the system. good luck hope this helps you.

Feb 02, 2010 | 2005 Dodge Grand Caravan

1 Answer

Oil and Coolant leak of about 11/2 quarts coolant - 1/2 quart oil per night Leak 1 (Coolant) Appears to be coming from the radiator bottom right corner. Leak 2 (oil) Appears to be coming from the engine...


The passenger right side of the car doesn't have any flanges for cooling system, if that's correct then your radiator has a leak or puncture.

The driver side of vehicle has both the in and out flanges for the radiator. Very common to see leak at the drain valve leaking (not closed tightly). In the same area would be bottom flange of radiator which the composite flange is degrading and causing the leak.

The middle part of the bottom engine compartment is where your oil/coolant cooler assembly just above the oil filter. A loose oil filter could be the cause 95% of the time and 5% would be a bad o-ring from the oil cooler to the oil filter flange.

Dec 16, 2009 | 2000 Volkswagen Beetle

1 Answer

I just replaced my radaiator in 1992 ford taurus 3.0 and if you are looking at the car the bottom right side is leaking, what can this be?


The drain valve is open. it is a "Tee" that can be turned by hand. It is on the "back side" at the bottom of the radiator sticking out towards the back.
Do not over-tighten (don't use pliers to tighten)

Not likely that the valve is missing. Look at the old radiator.

Sep 23, 2009 | 1992 Ford Taurus

3 Answers

Where is the valve located to let the water out of the radiator of a 99 chevy tahoe (lt) flacey@sbcglobal.net


facing the truck look under the right hand side where the radiator faces the engine you will see a small turn valve

Aug 26, 2009 | 1999 Chevrolet Tahoe

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