Engine Running Hot in Traffic
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- Bostn635csi
- Posts: 56
- Joined: Thu Jun 19, 2014 11:40 pm
- Location: Boston
Engine Running Hot in Traffic
Hello, the engine is running hot in traffic. Coolant level is full. As soon as I get some fresh air and out of traffic needle goes back to normal range. Any type of stop and go traffic the engine is running hot. Any ideas?
Kevin
1988 BMW 635csi, 5-speed
Lachsilber
1988 BMW 635csi, 5-speed
Lachsilber
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- Platinum Member
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- Joined: Thu Apr 08, 2004 3:24 pm
- Location: Gilroy (SF Bay Area) CA
Re: Engine Running Hot in Traffic
Sounds like the fan clutch to me
There is a way to test it with a rolled up newspaper, never tried it as it sounds like you may make a mess
But try to stop the fan with the engine idling and warmed up, if you can stop the fan, the clutch is shot
There is a way to test it with a rolled up newspaper, never tried it as it sounds like you may make a mess
But try to stop the fan with the engine idling and warmed up, if you can stop the fan, the clutch is shot
Bobbo
1980 633 CSi Cypress Green/Pearl Beige
2017 X5 M Sport Xdrive 35i Carbon Black/Ivory White
2005 330 Ci ZHP Cabrio Imola Red/Bone/Black
- hornhospital
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Re: Engine Running Hot in Traffic
+1 on it being the fan clutch. Classic symptoms.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann"; '95 M3 "Ashlyn"
- Bostn635csi
- Posts: 56
- Joined: Thu Jun 19, 2014 11:40 pm
- Location: Boston
Re: Engine Running Hot in Traffic
That's what I figured. Thanks for the help.
Kevin
1988 BMW 635csi, 5-speed
Lachsilber
1988 BMW 635csi, 5-speed
Lachsilber
Re: Engine Running Hot in Traffic
Hello
Clutch on fan,
They gum up, cleaned a couple with non chlorinated brake cleaner, the last on my Son's e32, used a piece of brake line tubing, bent a u shape on one end, was able to slide on a straw on other end, the one that comes with the can, sprayed front off fan clutch, was able to use same tubing with blowgun to hit area with com pressed air, repeated couple times, clutch fan was operable again
Franke
Clutch on fan,
They gum up, cleaned a couple with non chlorinated brake cleaner, the last on my Son's e32, used a piece of brake line tubing, bent a u shape on one end, was able to slide on a straw on other end, the one that comes with the can, sprayed front off fan clutch, was able to use same tubing with blowgun to hit area with com pressed air, repeated couple times, clutch fan was operable again
Franke
- Bostn635csi
- Posts: 56
- Joined: Thu Jun 19, 2014 11:40 pm
- Location: Boston
Re: Engine Running Hot in Traffic
Sorry for the delay in response. Below is what was done to resolve the issue.
Leaking Thermostat replaced
Ignition coil replaced
Replaced defective fan speed resistor
Replaced coolant thermostat
Replaced radiator viscous fan clutch
Replaced Crank position Sensor
Leaking Thermostat replaced
Ignition coil replaced
Replaced defective fan speed resistor
Replaced coolant thermostat
Replaced radiator viscous fan clutch
Replaced Crank position Sensor
Kevin
1988 BMW 635csi, 5-speed
Lachsilber
1988 BMW 635csi, 5-speed
Lachsilber