Volkswagen Golf Service & Repair Manual: Checking cooling system for leaks
| Special tools and workshop equipment
required |
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| Cooling system tester -V.A.G 1274 B- |
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| Adapter for cooling system tester -V.A.G 1274/8- |
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| Adapter for cooling system tester -V.A.G 1274/9- |
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Open cap -arrow- on coolant
expansion tank. |
| Engine at operating temperature. |
The cooling system is under pressure when the engine is hot. Hot
steam/hot coolant can escape - risk of scalding. Risk of scalding to
skin and body parts.Wear protective gloves.Wear eye protection.Release
pressure by covering cap of coolant expansion tank with a cloth and
opening it carefully. |
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Fit cooling system tester -V.A.G 1274 B- with adapter -V.A.G 1274/8-
on coolant expansion tank. |
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Using hand pump on tester, build up a pressure of approx.
1.0 bar. |
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If this pressure is not maintained, locate and rectify
leaks. |
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| Checking pressure relief valve in filler cap |
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Place cooling system tester -V.A.G 1274 B- with adapter -V.A.G 1274/9-
on filler cap. |
| – |
Build up pressure using hand pump of cooling system tester. |
| The pressure relief valve must open at a pressure of
1.6…1.8 bar. |
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Special tools and workshop equipment required
Refractometer -T10007 A-
Drip tray for workshop hoist -VAS 6208-
Hose clip pliers -VAS 634 ...
Other materials:
Checking auxiliary air heater element -Z35- with auxiliary air heater
control unit -J604-, LHD vehicles
Checking
Special tools and workshop equipment
required
Vehicle diagnostic tester with current probe 100 A -VAS
5051B/7-
Test conditions
Intake temperature less th ...
Removing and installing rear lid seal
In the factory a sealant is applied to the rear lid seal, the seal is fitted
to the body flange and then rolled on.
Note
When the seal is removed, the sealant on the inside of the seal will
be spread and the flanks will be bent out slightly. If the seal is then
refitted, sealing and fir ...
Gaskets, seals
After removing gaskets and seals, always inspect contact
surface of housing or shaft for burrs resulting from removal or
for other signs of damage.
Before installing seals, lightly oil outer diameter and
half-fill space between sea ...
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Draining and filling coolant