Removing and installing actuator for engine temperature regulation N493 — VW
Removing and installing actuator for engine temperature regulation N493 on VW: factory workshop procedure for engines CHHA, CHHB, CJSA, CJSB.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
🔧 Engine codes this applies to
📋 Procedure
Removing and installing
actuator for engine temperature regulation
N493
Special tools and workshop equipment required
Hose clamps up to 25 mm
3094
Hose clip pliers
VAS 6362
Drip tray for workshop hoist
VAS 6208
Removing
actuator for engine temperature regulation
N493
:
Open filler cap
arrow
on coolant expansion tank.
WARNING
When the engine is warm, the cooling system is under pressure.
Hot steam/hot coolant can escape - risk of scalding.
Cover filler cap on expansion tank with a cloth and open carefully to dissipate pressure.
Remove noise insulation
General body repairs, exterior
Rep. gr.
66
Noise insulation; Assembly overview - noise insulation
.
Release and unplug electrical connector
4
.
Note
Place a cloth underneath to absorb escaping coolant.
Set
drip tray for workshop hoist
VAS 6208
underneath.
Clamp off coolant hoses
5
with
hose clips up to 25 mm
3094
.
Release hose clips
arrows
and detach coolant hoses.
Unbolt
actuator for engine temperature regulation
N493
from bracket
Item
.
Removing
actuator for engine temperature regulation
N493
together with bracket from longitudinal member:
Note
This work step is required if the
actuator for engine temperature regulation
N493
must be removed in order to free some space.
Remove noise insulation
General body repairs, exterior
Rep. gr.
66
Noise insulation; Assembly overview - noise insulation
.
Release and unplug electrical connector
4
.
Remove nuts
3
.
Remove
actuator for engine temperature regulation
N493
1
together with bracket
2
.
Tie up
actuator for engine temperature regulation
N493
together with bracket on the side.
Installing
Install in reverse order. In the process, note the following:
Note
Secure all hose connections with hose clips meeting production standard
Electronic Parts Catalogue
.
Check coolant level
Anchor
.
Specified torques
Chapter
“
Assembly overview -
actuator for engine temperature regulation
N493
”
General body repairs, exterior
Rep. gr.
66
Noise insulation; 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.