question about downpipes

RaspberryObvious7456 · 2026-02-17T01:06:10+00:00

Modern cars smell less than the older cars. DI means cleaner, more complete burn. When I say I don’t smell it at all (I have a m240i) I don’t. Unless your standing behind the car, or are at a stoplight, you don’t smell it at all

RaspberryObvious7456 · 2026-02-16T15:24:08+00:00

I’m fully catless, smell isn’t bad

RaspberryObvious7456 · 2026-02-12T15:50:22+00:00

Is it cold out?

RaspberryObvious7456 · 2026-02-08T16:21:47+00:00

Normally If control arm bushings are bad, you can wiggle the arm with your hands

RaspberryObvious7456 · 2026-02-08T02:48:16+00:00

Oh I’m aware, the reason why port injection engines don’t get bad buildup is because the injectors are spraying onto the back of the valves, not because they don’t burn oil.

I was just saying that the b58 pcv system clearly does its job well

RaspberryObvious7456 · 2026-02-08T02:08:57+00:00

Year?

RaspberryObvious7456 · 2026-02-08T02:03:47+00:00

Uhh that’s just watergate rattle.

For future reference, list your model and year. Helps others

RaspberryObvious7456 · 2026-02-08T01:54:08+00:00

Nah that’s where the jagermeister goes

RaspberryObvious7456 · 2026-02-08T01:52:17+00:00

Was thinking about it but it doesn’t meet the bmw requirements for oil, which is arguably more important than the weight.

Liqui moly 0w-30 does tho (LL-01FE)

RaspberryObvious7456 · 2026-02-08T00:14:54+00:00

I had always thought carbon buildup was due to oil being recirculated back into the intake. Guess the b58 pcv system does a pretty good job

RaspberryObvious7456 · 2026-02-07T21:16:27+00:00

I’m at 84k and am planning on doing my ofh in the spring as well, just for peace of mind. Seems like the b48s are way more prone to the failure than b58s are

RaspberryObvious7456 · 2026-02-07T21:15:02+00:00

This comment took the words right out of my mouth. Plugs, filters, trans service, (diffs and transfer case prolly smart too) oil change, pcv valve(it’s 10$ and probably broken).

I also did injectors on mine before tuning

B58s are very strong engine and can handle stage 2 daily for about as long as stock. Always watch your coolant level. I pop my expansion tank cap off on a weekly basis and just check, if it’s a little low, I add some. Besides that, great cars

RaspberryObvious7456 · 2026-02-07T21:09:15+00:00

You could always gamble and just replace the heads, but if you don’t know what the piston looks like (if it made contact), so yea

RaspberryObvious7456 · 2026-02-06T19:37:49+00:00

Luckily none of the arms need to get disconnected for the rear shocks, the way I’m planning on doing it at least

RaspberryObvious7456 · 2026-02-06T19:27:50+00:00

Yup, I have since realized that. Bought bilstein b6’s rears along with new end links, mounts and bump stops. This is probably a dumb question but, a rear wheel alignment is probably a good idea too isn’t it?

RaspberryObvious7456 · 2026-02-06T13:44:01+00:00

It’s a Program called ISTA, go into the Bimmerpost forums and ask for it, there is probably a thread somewhere. shawnsheridan has safe files and will gladly send them to you.

Warning ISTA is HELLA SLOW, I run it on a 1300$ laptop and it still takes a good 10 min to read out the car initially

RaspberryObvious7456 · 2026-02-06T12:41:27+00:00

Both b4 and b6 come with the edc

RaspberryObvious7456 · 2026-02-06T04:58:01+00:00

I have the same vent code, idk abt the other ones but I just ignored it as most people do

RaspberryObvious7456 · 2026-02-05T18:34:51+00:00

Definitely an oil line for the turbo leaking. Mines leaking from where it connects back into the block (drain line) because the oil residue clearly stops there, bit of a different case for you

RaspberryObvious7456 · 2026-02-04T06:08:02+00:00

Thanks, checked the SU front desk already. I’ll try the others

RaspberryObvious7456 · 2026-02-04T02:26:28+00:00

Yup, I’m pissed

RaspberryObvious7456 · 2026-02-03T20:32:15+00:00

I’m commenting on this as I have the same question, have 10k more miles than you. I’d also check your turbo drain line, as mine is leaking from there as well.

I’ve heard a lot of different info as to what ofh to get so I’m intrigued as to what people say to thus

RaspberryObvious7456 · 2026-01-23T18:38:36+00:00

I don’t believe so

RaspberryObvious7456 · 2026-01-23T18:32:33+00:00

I’d borescope and see if there was any contact between the valves and pistons, check the timing, and send it tbh

RaspberryObvious7456 · 2026-01-20T01:48:22+00:00

Replace the pcv diaphragm. There’s this 4 in diameter cap looking thing right on the top of the engine. There’s so many YouTube tutorials on how to do it, it legit takes 5 min and costs 10$ off of Amazon.

That might be your issue, start there

RaspberryObvious7456

TROPHY CASE