Problems after MPACT: Downpipe? Turbo? Exhaust Manifold?

[1320racer]

Here's some background and have any of you experienced the following problem...

A Stage 1 Tune was installed just over a month ago and has been flawless. Yesterday, when driving home from the horribly managed Pocono East MPACT event, I may have damaged my engine, turbos and/or exhaust system.

After waiting to enter Pocono Raceway for 3+ hours (~11:30 AM to ~2:30 PM) I left extremely frustrated. After waiting in line for that long, I was still not even close enough to see the main entrance due to hundreds of butt hole drivers, who illegally drove past everyone who were waiting their turn and using proper etiquette.

...during my drive home from MPACT 2020, I should not have done so, but I pushed the car to ~150 mph multiple times as there were spots with absolutely no traffic.

I did not notice until the following morning when I drove with the windows down that:

• exhaust sounds like an old chevy with a leaking header gasket
• there's less power upon initial acceleration
• can smell exhaust when I opened the hood

I'm wondering if I melted the original cats causing a clog and then blew out the downpipe gaskets? Seems if there was an issue with an injector, spark plug, or coil, I would have a misfire code and/or drivetrain error. After the engine is cool, I will crawl underneath to see if I can determine the cause of the problem(s). Wish me luck and hopefully, it is nothing too expensive

Edit: added pics
Update: Seems O2 sensor on the US passenger side (top pic) failed or partially blew out. The US driverside (bottom pic) seems to have a clip and is seated into the hole correctly. It is still too hot to know for sure.

[Studentloan_f32]

Not too sure how to help but that mpact line was truly a disaster. Upper management basically politely told me to get lost after i complained about waiting for 4 hours at the entrance.

[1320racer]

Originally Posted by Studentloan_f32

Not too sure how to help but that mpact line was truly a disaster. Upper management basically politely told me to get lost after i complained about waiting for 4 hours at the entrance.

I'm sorry they were not helpful and showed no empathy.

You actually got in but waited four hours! Wow!

What time did you arrive?

Did you need to complete COVID-19 forms at the entry gate? That's what someone else posted on FB. If so, they should have set that up to be completed online and BEFORE THE EVENT! It was truly a horrible day for many who spent their hard-earned money and time driving to and from the event!

[cudakid03]

The pictures just show that the heat shield is a little out of place. It is just a metalic donut that can be pushed back in place. Nothing to do with the o2 sensor sealing.

[1320racer]

Originally Posted by cudakid03

The pictures just show that the heat shield is a little out of place. It is just a metalic donut that can be pushed back in place. Nothing to do with the o2 sensor sealing.

Thanks and you are correct. I tried to remove the 02 sensor without removing anything else and the sensor feels as if it is still solidly threaded into the downpipe.

Looks like I need to make a deeper dive and remove the DMEs and the aluminum bridge they are mounted to. Not sure how many bolts hold the aluminum cover over the downpipes—hoping it's not too difficult!

[cudakid03]

It's not too bad. I followed this thread to install downpipes:

http://f10.m5post.com/forums/showthread.php?t=1425383

It should help you with how things come apart to get to the downpipes.

[Studentloan_f32]

Originally Posted by 1320racer

I'm sorry they were not helpful and showed no empathy.

You actually got in! Four hours! Wow!

What time did you arrive?
Did you need to complete COVID-19 forms at the entry gate? That's what someone else posted on FB. If so, they should have set that up to be completed online and BEFORE THE EVENT! It was truly a horrible day for many who spent their hard-earned money and time driving to and from the event!

I got there 5 minutes before gate opened. It was absolutely ridiculous, i had to sign two forms at the entrance and then scanned and ticketed in at the second entrance. Absolutely no coordination with mpact this year. Took the money and ran

[1320racer]

Originally Posted by cudakid03

It's not too bad. I followed this thread to install downpipes:

http://f10.m5post.com/forums/showthread.php?t=1425383

It should help you with how things come apart to get to the downpipes.

Thanks for sharing this helpful link cudakid03.

[1320racer]

Engine bay sounds and smells like there's an exhaust leak. I purchased a Vehicle Service Plan (VSP) through Concord hoping it'd cover major repairs. After reviewing the top-tier Platinum plan that I purchased, it seems gaskets for the exhaust manifolds and/or turbos are covered only if there's an internal failure of the motor or turbo.

I want to go into this repair knowing all I can. What are the best resources providing mechanical 'exploded view' drawings?

[M6Roar]

Originally Posted by 1320racer

Engine bay sounds and smells like there’s an exhaust leak. I purchased a Vehicle Service Plan (VSP) through Concord hoping it’d cover major repairs. After reviewing the top-tier Platinum plan, it seems gaskets for the exhaust manifolds and/or turbos are covered only if there’s an internal failure of the motor or turbo.

I want to go into this repair knowing all I can. What are the best resources providing mechanical ‘expanded‘ drawings?

https://www.newtis.info/tisv2/a/en/

[1320racer]

Originally Posted by M6Roar

https://www.newtis.info/tisv2/a/en/

There’s a gold mine of info here. Thanks for sharing this very useful link!

[1320racer]

This is may be the problem.

I found this info regarding M5s and M6s with manifold leaks. The cause is the exhaust manifold attaching screws have come loose, causing an exhaust leak. Click Here or copy paste this link...https://static.nhtsa.gov/odi/tsbs/20...48251-9999.pdf

SUBJECT S63TU Engine: Leaking Exhaust Manifold

MODEL F10 (M5 Sedan)Produced to 5/14/2012 F12 (M6 Convertible)Produced to 5/14/2012 F13 (M6 Coupe)Produced to 5/14/2012

SITUATION Noise heard from the engine compartment while the engine is running. It is more pronounced when the engine is under load.

PROCEDURE Replace both exhaust manifold to cylinder head gaskets as per Repair Instruction 1814 10 and 18 14 20

Removing and installing/renewing left exhaust manifold
Removing and installing/renewing right exhaust manifold

WARRANTY INFORMATION Covered under the terms of the BMW New Vehicle/SAV Limited Warranty