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      01-26-2018, 03:31 PM   #1
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Unhappy Delete thread

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Last edited by DG20; 01-31-2018 at 12:20 PM..
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      01-26-2018, 08:00 PM   #2
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This is a difficult and unfortunate one. Because there IS a non-OEM modification present (and close to the engine), BMW has the freedom to consider this claim to their benefit. Keep us updated! Good luck.
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      01-26-2018, 08:06 PM   #3
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Really sorry to hear about this. I wonder if a contributing factor may have been the downpipe flowing significantly more air and thus leaning out your A/F ratio. DME fuel trims can only do so much. I'd think JB4 would be a prerequisite if you wanted to run downpipe / go FBO.

You may consider getting your car out of there, swapping in your stock downpipe, and testing your luck with a different dealer. Good luck and keep us posted.
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      01-27-2018, 02:51 AM   #4
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If the car is at the BMW dealership everything is already documented.
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      01-27-2018, 05:35 AM   #5
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I can't see how a catted dp can cause this issue, does not add up to me. Motor sounds like it was factory defective. There is a thread on these motors having mysterious coolant leaks.
They will have to prove that dp caused the issue before they just claim it's the fault of the dp. To me it does not make sense. It is a very popular mod . Don't let them easily convince you your at fault for something that was probably and more likely a factory defect. Sounds like a defective head gasket issue for sure.

Please review this thread especially the last few pages
http://f30.bimmerpost.com/forums/sho....php?t=1292652
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      01-27-2018, 05:39 AM   #6
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Quote:
Originally Posted by blckz06 View Post
Really sorry to hear about this. I wonder if a contributing factor may have been the downpipe flowing significantly more air and thus leaning out your A/F ratio. DME fuel trims can only do so much. I'd think JB4 would be a prerequisite if you wanted to run downpipe / go FBO.

You may consider getting your car out of there, swapping in your stock downpipe, and testing your luck with a different dealer. Good luck and keep us posted.
The dme would adjust plus he never went catless. Yes I would take the car to another dealer .
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      01-27-2018, 06:21 AM   #7
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If your SA is being nice enough to have u remove the downpipe, I'd do it before the engineers show up. Tow it to a shop to have them install the oem DP and tow it back to the dealer. My 2cents

And hope that your SA or the TECH didn't flag your car for warranty claims yet.
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      01-27-2018, 06:45 AM   #8
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What other mods were you running with DP? JB4?
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      01-27-2018, 06:50 AM   #9
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So moral of the story is avoid dp. JB4 appears to be safer as any problems are easily solved by removing jb4 with no permanent damage. Check engine light will clear itself after a couple driving cycles, or simply turn off jb4 and set back to factory defaults. Much like coding a vehicle. SAs won't bother if you leave jb4 in vehicle but car runs normally at time of service.
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      01-27-2018, 06:54 AM   #10
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did you notice white smoke first?
did you notice your temps going up?
did all these symptoms appear all at once?
were there any engine codes that indicated superknock
what likely happened is engine malfunc (likely too lean) of some kind which lead to your block cracking/damage w/coolant leaks into your exhaust and overheating
hopefully it wasnt the block cracking but the coolant in the exhaust is not a good sign

sorry to hear that
well ya cant turn back time but if you wanted xtra power I'd have just put a light piggyback tune on instead of a performance catted dp
what brand catted DP was it BTW
did you have any tunes on at all?
what octane were you running?

obviously in light of the ridiculous high cost of an engine replacement, it'd be worth it to visit all possibilities to try and squirm out of this
you could tow it to another dealer (w/oem dp of course) but the info is already in the system for your car so all dealers should be able to see.. but you could try
you could roll the dice to find a good indep shop for a second opinion and see if you can avoid the $$$ of an engine replacement and fingers crossed the block isnt cracked
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      01-27-2018, 09:12 AM   #11
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Off topic......but I can't figure why some of the forum members here mod OEM engines that are still under warranty ?

When something like this happens it seems it would have been cheaper over the long run to buy an OEM car/engine that is designed and delivered from the factory for the performance one seeks.
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      01-27-2018, 09:41 AM   #12
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Quote:
Originally Posted by BillD1953 View Post
Off topic......but I can't figure why some of the forum members here mod OEM engines that are still under warranty ?

When something like this happens it seems it would have been cheaper over the long run to buy an OEM car/engine that is designed and delivered from the factory for the performance one seeks.
I can understand what you are saying however certain mods should not affect the warranty like cat back exhaust,rims,airfilter,struts things like that. To me the replacing of a catted dp to a higher flowing catted DP should not either especially if it is a CARB certified upgrade. BMW allows Dinan to mod your car from day 1 of purchase and it has a warranty on top of the BMW warranty.

There are also folks that the OP can talk to in knowing how to handle this situation with the motor damage but I am sure the DP did not cause a head gasket to blow which seems to be the issue. The B58 issues are surely but slowly popping up and coolant leaks was certainly one of them.
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      01-27-2018, 11:32 AM   #13
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The less you say to the dealer the better. You do not have to mention any mods therefore giving them ammunition to screw you. But I will repeat the car sounds like it has a defective head gasket or coolant leak issue. Excessive knock can cause a head gasket to blow especially if the car has a defective knock sensor again not your fault. Don't play victim,be vigilant and tell them they have to fix your car man! You can call Dinan and ask them as well about the SW causing an issue but it is unlikely. Blown motors and transmissions in new cars happen daily man. BMW is not immune to that. People have posted it here on the forums.

Have you had any CEL's in the past?

I'm telling you your mods did not cause this issue.
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      01-27-2018, 11:34 AM   #14
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Quote:
Originally Posted by AW F30 View Post
Just a question for you all... can BMW deny an engine replacement because of my downpipe without showing any evidence that the downpipe caused it? My SA said that they will 9/10 not replace the engine (from what he has seen in the past), but he said that i might get lucky and have them replace it. He told me that they see how many times the car has been launched, ran on empty tank, redlined, etc. All of those are rare for me to do so im hoping they see that im not some racer or whatever just because I have a downpipe.
They have to show how the dp could have caused it! They will mostly check to see that you had proper engine maintenance done to the car. That will be the major key to them. Do not let them convince you that you are at fault if maintenance and all were done. Your SA does not have a clue!
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      01-27-2018, 11:42 AM   #15
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Anyone know how much a new engine (installed) from the dealer would cost? OP - did they mention an estimate?
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      01-27-2018, 12:13 PM   #16
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Quote:
Originally Posted by AW F30 View Post
And by the way, the CEL did not come on at all while these problems were occurring. Nothing. After i pulled over and restarted the car, the CEL came on and I got a drivetrain malfunction.
I've never had a CEL in the past as far as I can remember.
You 're good man! If they threaten your warranty you threaten that you will have to get counsel involved even if its just writing a letter.
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      01-27-2018, 12:14 PM   #17
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Quote:
Originally Posted by AW F30 View Post
Nope, we haven't gotten to that point yet. They're doing a leak down test now to figure out where the problem is coming from and from there, they tell BMW and it 99.9% of the time results in a new engine because BMW doesn't want to risk fixing individual parts.
This is 1000% true!! White smoke loss of power means engine failure in my books. If the car over heated or missfired cyl 6 and 1 almost surely means head gasket failure or bad injector. The white smkoe can mean head gasket or sometimes even crankcase ventilation failure.
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      01-27-2018, 12:15 PM   #18
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Quote:
Originally Posted by blckz06 View Post
Anyone know how much a new engine (installed) from the dealer would cost? OP - did they mention an estimate?
Thats not the OPs concern!! That's BMWs problem.
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      01-27-2018, 01:06 PM   #19
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Best of luck OP, I'm afraid you're going to need it.
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      01-27-2018, 02:52 PM   #20
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The fact that you were running the non-warrantied Dinan tune raises a red flag. Unfortunately, they can most likely see that. It's not the catted DP that's gonna screw you, but the Dinan sport tune. Best of luck OP.
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      01-27-2018, 02:57 PM   #21
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As some poster have stated no way can bmw reject the warranty over the cat as they could never prove in the courts that an exhaust cause a block failure but if they detect a tune then your screwed.
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      01-27-2018, 04:07 PM   #22
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Op just get the car fixed ,insist they fix the car,no need to mention the tune. Unless.the car was running super advanced timing which would have thrown a CEL first, I still say manufacturers defect . Keep us posted.
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