How to carry out replacement: Thermostat 280 SL 2.8 (107.042) Mercedes R107
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Change Mercedes R107 450 SL 4.5 (107.044) Thermostat yourself – manuals and video tutorials

How to change engine thermostat on MERCEDES-BENZ SL (R107) – replacement guide

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Download your free tutorial and fix MERCEDES-BENZ SL (R107) 280 SL 2.8 (107.042) problems yourself Download for free 1.4 MB Thermostat for Mercedes R107 Shop now
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When to replace the Thermostat on your MERCEDES-BENZ SL
Recommended replacement interval for the part category Engine thermostat : 50000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ SL (R107) 280 SL (107.042), MERCEDES-BENZ SL (R107) 300 SL (107.041), MERCEDES-BENZ SL (R107) 300 SL (107.041) … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Thermostat for SL (R107) and other MERCEDES-BENZ models
How to change Engine thermostat on Mercedes R107 280 SL 2.8 (107.042) – step-by-step instructions for straightforward car repair Engine thermostat
How to change Engine thermostat on SL Convertible (R107) – tips for proper car maintenance
Engine thermostat for SL Convertible (R107) Petrol (185 hp)
Simple DIY car repair steps – Replacing Engine thermostat on SL Convertible (R107)
Engine thermostat for SL Convertible (R107) Petrol (180 hp)
Easy tricks to help you to replace Engine thermostat on SL Convertible (R107)
Engine thermostat for SL Convertible (R107) Petrol (188 hp)
Tools
Replacement: engine thermostat – MERCEDES-BENZ SL (R107). Tools you might need:
Wire brush
All-purpose cleaning spray
Torque wrench
Combination spanner #10
Drive socket # 7
Drive socket # 8
Drive socket # 10
Ratchet wrench
Long nose pliers
Funnel
Fluid container
Fender cover
Buy tools
Replacement: engine thermostat – MERCEDES-BENZ SL (R107). AUTODOC recommends:
  • Check the condition of the coolant every time you replace the thermostat. Change the coolant if necessary.
  • Please note: all work on the car – MERCEDES-BENZ SL (R107) – should be done with the engine switched off.
Carry out replacement in the following order:
  1. Step 1
    Open the bonnet.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    Unscrew the coolant reservoir cap.
    Step 4
    Lift the car using a jack or place it over an inspection pit.
    Step 5
    Prepare a container for fluids.
    Step 6
    How to change Thermostat on Mercedes R107 1971 - free PDF and video manuals
    Open the coolant drain tap.
  2. Step 7
    How to replace MERCEDES-BENZ SL (R107) 280 SL 2.8 (107.042) 1972 Thermostat - step-by-step manuals and video guides
    Drain the coolant from the engine.
    Replacement: engine thermostat – MERCEDES-BENZ SL (R107). AUTODOC experts recommend:
    All work should be done with the engine stopped.Wait until the coolant has completely flowed out of the drain hole.
  3. Step 8
    Close the coolant drain tap.
    Step 9
    Mercedes R107 450 SL 4.5 (107.044) 1973 Thermostat replacement: free workshop manuals
    Loosen the clamp of the expansion tank hose. Use a drive socket #7. Use a ratchet wrench.
  4. Step 10
    Changing Thermostat on MERCEDES-BENZ SL (R107) 560 SL 5.6 (107.048) 1974 by yourself
    Detach the expansion tank hose from the thermostat housing.
  5. Step 11
    How to remove MERCEDES-BENZ SL 350 SL 3.5 (107.043) 1975 Thermostat - online easy-to-follow instructions
    Detach the coolant hose.
  6. Step 12
    How to replace Thermostat on MERCEDES-BENZ SL (R107) 1976: download PDF manuals and video instructions
    Unscrew the thermostat housing fasteners. Use a drive socket #10. Use a ratchet wrench.
  7. Step 13
    How hard is it to do yourself: Thermostat replacement on Mercedes R107 300 SL 3.0 (107.041) 1977 - download illustrated guide
    Remove the fastening bolts.
  8. Step 14
    Need to know how to renew Thermostat on MERCEDES-BENZ SL 1978? This free workshop manual will help you to do it yourself
    Remove the thermostat together with the housing.
    Replacement: engine thermostat – MERCEDES-BENZ SL (R107). Professionals recommend:
    Caution! Coolant may leak out of the coolant lines and thermostat housing.
  9. Step 15
    Changing of Thermostat on Mercedes R107 1979 won't be an issue if you follow this illustrated step-by-step guide
    Clean the thermostat housing mounting seat. Use all-purpose cleaning spray.
  10. Step 16
    Clean the thermostat mounting seat. Use a wire brush. Use all-purpose cleaning spray.
    Step 17
    MERCEDES-BENZ SL 450 SL 4.5 (107.044) Thermostat replacement: online guides and video tutorials
    Install a new thermostat.
  11. Step 18
    Replacing Thermostat on Mercedes R107 1981 280 SL 2.8 (107.042) by yourself
    Install the thermostat housing.
    Replacement: engine thermostat – MERCEDES-BENZ SL (R107). Tip from AUTODOC experts:
    Be sure to use a new O-ring when installing the sensor.
  12. Step 19
    SL (R107) 350 SL 3.5 (107.043) 1982 Thermostat DIY replacement workshop manual
    Install the fastening bolts.
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DIY MERCEDES-BENZ SL (R107) Thermostat replacement - online guide
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