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pic for carrepair


Things You'll Need:

Radiator-pressure test kit
Stop-leak additive
Soldering iron or epoxy gun
Engine coolant.

1. Look for signs of coolant
leakage on the garage floor,
driveway or ground under
your vehicle.

2. Check the level of coolant in
the overflow reservoir or
inside the radiator by
removing the radiator cap.
The engine must be cool
before the radiator cap can
be safely removed. If the
coolant level in the overflow
reservoir or radiator is
unusually low, odds are good
that you have a leaky car

3. Inspect the radiator to find
where it is leaking. There
may be an obvious hole or
other defect that is easy to
spot, such as deposits of
coolant and an orange or
green discoloration.

4. Remove the radiator for
further testing if the leak
cannot be found.

5. Use a radiator pressure test
kit to fill the radiator with
the amount of air specified
by the radiator cap.
Submerge the radiator in a
tank of water and watch for
escaping air bubbles. The
source of these bubbles is
the leak that must be

6. Pour the stop-leak additive
into the radiator to fix small
leaks, following the
instructions on the product

7. Use a soldering iron to patch
larger defects in radiators
made of copper and brass,
which are frequently found in
older models. An epoxy gun
may do the trick for the
aluminum radiators in newer

8. Refill the vehicle's cooling
system after the radiator
leak is repaired.


Some motorists keep a jug
of water and a jar of black
pepper in their vehicle for
stop-gap repairs of leaky
radiators. Pepper expands in
water and may temporarily
plug a small hole in a radiator.
This should only be done in an

Consult a mechanic who is
familiar with cooling systems
before trying to repair a
radiator leak.

Never drive a vehicle if you
know it has a leaky radiator.
Overheating can occur
rapidly and lead to severe
engine damage.

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