The Random E46/ZHP Question Thread

[ELCID86]

I'm planning on swapping out my front seats today for the M3 seats I picked up this weekend. I plan to use this DIY:

http://forum.e46fanatics.com/showthread.php?t=657042

Is there anything else I need to do or should be worried about? I plan to disconnect the battery as my first step so I don't forget.

Be sure to get them into a good position (mostly forward?) before you disconnect.


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"ZHP is a garbage option anyway- just some cosmetic upgrades with a different cam and diff to claw back some of the performance lost fitting those hideous and heavy wheels. Any 330 with a 3.46 diff will smoke a ZHP every time. The whole Mafia thing reeks of childish behavior." - an e46fanatic

[BMWCurves]

Good idea, thanks!

[TigerTater]

If I were to install O2 spacers (spark plug non-foulers) to get rid of a CEL with aftermarket headers it wouldn't have any affect on performance and airflow correct?

Plug non foulers don't really work on our cars. Much too smart. Only way to run headers and be obd2 compliant is to run a wide band controller to trick computer into seeing the rear o2 sensors are intact and functional

[stephenkirsh]

Hey, I went to my local non-dealer shop for a coolant flush. He says he pressure tested and spotted a leak at the water pump, wants $400 for the job, but NOTED that at least this includes the coolant flush as part of the job.

This all seem reasonable? It's not one of those "you're a dummy" things like a hose clamp that just needs tightening or similar, right?

You should really be replacing the entire cooling system. Search around for info. Parts and labor will be $700-1000 depending.

[UWISHU1]

I've been hearing and reading a lot about the cooling system reboot, so I plan to do it soon. Will the car start running hot and I'll be able to see it on the temp gauge with at least a little notice before a problem? I generally watch my temp gauge religiously.

[johnrando]

Question on O2 sensors that maybe someone can save me some lookup trouble. What is the recommended mileage to change them at?

[fredo]

I know the e90's interval to replace O2 sensors is 100,000 miles. This is based on miles, not years of use. However, I don't know about the e46. GL.

[BMWCurves]

I've been hearing and reading a lot about the cooling system reboot, so I plan to do it soon. Will the car start running hot and I'll be able to see it on the temp gauge with at least a little notice before a problem? I generally watch my temp gauge religiously.

If things start going south on your cooling system you'll probably see the temp gauge go up. That said, you'll want to shut your car down immediately if it starts to climb. I'd wager you might also see a bunch of steam if there's catastrophic failure (burst hose or something), but not much visual evidence if there's a steady leak.

Question on O2 sensors that maybe someone can save me some lookup trouble. What is the recommended mileage to change them at?

Someone said something recently regarding coils and O2 sensors, I think they said around 125k or earlier for the sensors.

[UWISHU1]

If things start going south on your cooling system you'll probably see the temp gauge go up. That said, you'll want to shut your car down immediately if it starts to climb. I'd wager you might also see a bunch of steam if there's catastrophic failure (burst hose or something), but not much visual evidence if there's a steady leak.

Noted. Thx man.

[johnrando]

Just remember our temp gauges have a wide range of "flux" in them so by the time you see it really going up, it's almost too late and you have to shut down immediately.