DIY weekend - thermostat and fuel filter advice needed
Thread Starter
Senior Member
Joined: Dec 2001
Posts: 280
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From: Illinois
'04 Mars Red C230K 6 sp.
DIY weekend - thermostat and fuel filter advice needed
This weekend, if all goes well, I am replacing:
- spark plugs
- air and fuel filters
- thermostat
- possibly the turn signal switch, which doesn't "catch" when signaling for a right turn.
I would greatly appreciate any input from anyone who has done these.
- spark plugs
- air and fuel filters
- thermostat
- possibly the turn signal switch, which doesn't "catch" when signaling for a right turn.
I would greatly appreciate any input from anyone who has done these.
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Let me know how easy the fuel filter is, I want to replace mine soon.
Spark plugs I did this morning, piece of cake.
- pop engine cover off
- remove 8 screws on coil-packs
- disconnect and remove coilpacks (requires moving a couple cables and parts)
- remove and replace spark plugs
Air filter is easy too, remove the top of the airbox (6 screws) and the air filter slides out.
Thermostat requires a coolant flush from what I know. Its inside one of the hoses at the front top of the engine bay...??? thus you have to flush the system, or coolant will leak out everywhere.
Spark plugs I did this morning, piece of cake.
- pop engine cover off
- remove 8 screws on coil-packs
- disconnect and remove coilpacks (requires moving a couple cables and parts)
- remove and replace spark plugs
Air filter is easy too, remove the top of the airbox (6 screws) and the air filter slides out.
Thermostat requires a coolant flush from what I know. Its inside one of the hoses at the front top of the engine bay...??? thus you have to flush the system, or coolant will leak out everywhere.
MBWorld Fanatic!
Joined: Dec 2003
Posts: 3,275
Likes: 236
From: BC, Canada
2003 C230K Coupe Orion Blue
I had the exact same problem with the turn signal stalk. Had it replaced under warranty. Those things are loose eh? The new one is way tighter. Let me know which part # you got as a result 
MBWorld Fanatic!
Joined: Jan 2006
Posts: 3,212
Likes: 8
From: Pasadena, CA
2002 C230K, 2013 BMW 328, 2015 BMW X5
Do it one at a time, and work quickly.
Air filter, are you really asking?
Thermo, like you I thought to replace it as part of PM, but I understand it sticks in the open position, not closed.
Stalk, don't have that problem.
Have fun.
E
Thread Starter
Senior Member
Joined: Dec 2001
Posts: 280
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From: Illinois
'04 Mars Red C230K 6 sp.
Thanks, guys - I have not bought the turn signal switch yet. The thermostat is kicking on the Check Engine light.
I am assuming that the thermostat is where the uper radiator hose meets th block. Yes?
I am assuming that the thermostat is where the uper radiator hose meets th block. Yes?
Thread Starter
Senior Member
Joined: Dec 2001
Posts: 280
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From: Illinois
'04 Mars Red C230K 6 sp.
Ok, I did wiper blades, oil change, spark plugs, thermostat, cabin air, and air filters. The fuel filter will have to wait for another day.
It looks like I need a new cold air intake hose, as mine is coming uncoiled.
My engine cover was also stuck and I had to break one of the mounting posts to get it off.
Other than that, my car is unscathed and I saved a couple hunded dollars from what the dealer would have charged.
It looks like I need a new cold air intake hose, as mine is coming uncoiled.
My engine cover was also stuck and I had to break one of the mounting posts to get it off.
Other than that, my car is unscathed and I saved a couple hunded dollars from what the dealer would have charged.
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Ok, I did wiper blades, oil change, spark plugs, thermostat, cabin air, and air filters. The fuel filter will have to wait for another day.
It looks like I need a new cold air intake hose, as mine is coming uncoiled.
My engine cover was also stuck and I had to break one of the mounting posts to get it off.
It looks like I need a new cold air intake hose, as mine is coming uncoiled.
My engine cover was also stuck and I had to break one of the mounting posts to get it off.
I replaced the hose with 2 3.5" silicon couplers and 12" long 3.5" stainless intake pipe. It was a little difficult fit, yet looks and functions way better.
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Thread Starter
Senior Member
Joined: Dec 2001
Posts: 280
Likes: 0
From: Illinois
'04 Mars Red C230K 6 sp.
Yes, the thermostat was where we expected. Two bolts - pretty easy! Only a few drops of coolant leaked out - I was parked slightly uphill! 
I may have to fabricate a cold air tube.
I may have to fabricate a cold air tube.
