Removing and installing rear coolant pipe for additional heater — VW
Removing and installing rear coolant pipe for additional heater on VW: factory workshop procedure for engines BJB, BLS, BSU.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📋 Procedure
ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.
Removing and installing rear coolant pipe for additional heater
Vehicles with four-wheel drive
Special tools and workshop equipment required
Refractometer
T10007 A
Drip tray
V.A.G 1306
or
drip tray
VAS 6208
Torque wrench 5-50 Nm
V.A.G 1331
Spring-type clip pliers
VAS 5024A
Adapter for cooling system tester
V.A.G 1274/8
Cooling system charge unit
VAS 6096
Hose clamps up to 25 mm
3094
Removing
Observe safety precautions
Chapter
.
Remove noise insulation
General body repairs, exterior
Rep. gr.
50
Body - front; Noise insulation
.
Remove front right wheel housing liner
General body repairs, exterior
Rep. gr.
66
Wheel housing liners; Front wheel housing liner
.
Remove propshaft
Rear axle and rear final drive
Rep. gr.
39
Propshaft; Removing and installing propshaft
.
Remove right drive shaft
Running gear, axles, steering
Rep. gr.
40
Drive shafts; Removing and installing drive shaft
.
Disconnect electrical connector from
oil level and oil temperature sender
G266
and unclip wire from subframe.
Caution
Risk of scalding.
When the engine is warm, the coolant temperature may be above 100 °C. The cooling system is pressurised.
Before carrying out repairs, release pressure and allow temperature to drop as necessary.
Clamp off coolant hoses to rear coolant pipe using
hose clamps, up to 25 mm in diameter
3094
.
Pull off coolant hoses.
Unbolt heat shield for right drive shaft from bevel box
arrows
.
Pull off coolant hoses for auxiliary heater on coolant pipe.
Unbolt and remove coolant pipe from sump.
Installing
Installation is carried out in the reverse order; note the following:
Install right drive shaft
Running gear, axles, steering
Rep. gr.
40
Drive shafts; Removing and installing drive shaft
.
Install propshaft
Rear axle and rear final drive
Rep. gr.
39
Propshaft; Removing and installing propshaft
.
Install front right wheel housing liner
General body repairs, exterior
Rep. gr.
66
Wheel housing liners; Front wheel housing liner
.
Install noise insulation
General body repairs, exterior
Rep. gr.
50
Body - front; Noise insulation
.
Replenish coolant
Chapter
.
Specified torques
Chapter
“
Assembly overview - coolant pump, thermostat
”
Drive shafts; Assembly overview - drive shafts
Rep. gr.
40
Assembly overview - drive shaft
.
Propshaft; Assembly overview - propshaft
Rep. gr.
39
Assembly overview - propshaft
Noise insulation; Assembly overview - noise insulation
Rep. gr.
50
Assembly overview - noise insulation
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.