Walnut shell blasting before/after, with pics // (New noise

NYHoustonman · 08-29-2014, 11:49 AM

Update: The cause of this was carbon deposits, which I just had cleaned out. See below for before/after pics - first two are before, second two are after. This was on a car with 58k miles, and the difference is huge. The engine runs much more smoothly and the hesitation/afterfiring seems to be gone. Very happy with the results

.

***

I'm experiencing something new in recent weeks with my lightly modified 135i. On upshifts during hard acceleration, I'm more frequently hearing backfire-like noises - not the burble/popping on deceleration that we all love, but full-on louder single pops. No hesitation during driving, but I've also noticed a slightly rougher idle on cold start.

My car has the 6-speed automatic with Alpina B3 transmission software (so faster upshifts in manual mode).

Is this something a lot of you are seeing, or should I be concerned?

Overpar56 · 08-30-2014, 02:24 PM

No codes being thrown?

NYHoustonman · 08-30-2014, 09:53 PM

No codes, no hesitation.

NYHoustonman · 09-18-2014, 04:12 PM

Update - fixed!

Ed P · 09-18-2014, 04:17 PM

Great news, and thanks for reporting back!

edisapimp · 09-18-2014, 04:37 PM

Can't wait to get this done.. I just have to get my behind down to oceanside.

rps · 09-19-2014, 09:27 AM

I had that done at the dealer on my previous 135i. The result was that piston 6 disintegrated and they had to replace the engine. I can't say the blasting caused it but, I will never try it again. The blown engine was the reason I traded the car, if it had happened 4 months later, the cost would have been ~$20k.

NYHoustonman · 09-19-2014, 10:35 AM

Quote:

Originally Posted by rps

I had that done at the dealer on my previous 135i. The result was that piston 6 disintegrated and they had to replace the engine. I can't say the blasting caused it but, I will never try it again. The blown engine was the reason I traded the car, if it had happened 4 months later, the cost would have been ~$20k.

Ouch, that sucks. From what I have read, this is a recommended service for those of us with N54 (and maybe N55) engines, as long as it's done right... But I've never heard of that happening before

.

MuNkY6913 · 09-19-2014, 08:56 PM

This is what mine looked like when I did it myself with wire brushes and brake kleen. It seemed like It ran better. But I was chasing a misfire and it ended up being o2 sensors so I wasn't really paying attention to performance. Just wanted the misfire gone.

Valve cleaning http://www.1addicts.com/forums/showthread.php?t=885774

delta-9-ginseng · 09-20-2014, 03:27 AM

how much did it run you?

MuNkY6913 · 09-20-2014, 07:59 AM

Quote:

Originally Posted by delta-9-ginseng

how much did it run you?

8 hours and 6 cans of break Kleen, $5 gun cleaning set. Hahaha.

delta-9-ginseng · 09-20-2014, 06:57 PM

Quote:

Originally Posted by MuNkY6913

8 hours and 6 cans of break Kleen, $5 gun cleaning set. Hahaha.

HAHAH

NYHoustonman · 09-21-2014, 12:59 AM

Quote:

Originally Posted by delta-9-ginseng

how much did it run you?

$700. Or... That /\

08-29-2014, 11:49 AM	#1
NYHoustonman Private First Class 19 Rep 140 Posts Drives: 2009 135i Dinan S3 Join Date: Aug 2012 Location: San Jose, CA iTrader: (0)	Walnut shell blasting before/after, with pics // (New noise - backfire on upshifts) Update: The cause of this was carbon deposits, which I just had cleaned out. See below for before/after pics - first two are before, second two are after. This was on a car with 58k miles, and the difference is huge. The engine runs much more smoothly and the hesitation/afterfiring seems to be gone. Very happy with the results . *** I'm experiencing something new in recent weeks with my lightly modified 135i. On upshifts during hard acceleration, I'm more frequently hearing backfire-like noises - not the burble/popping on deceleration that we all love, but full-on louder single pops. No hesitation during driving, but I've also noticed a slightly rougher idle on cold start. My car has the 6-speed automatic with Alpina B3 transmission software (so faster upshifts in manual mode). Is this something a lot of you are seeing, or should I be concerned? Attached Images Last edited by NYHoustonman; 09-18-2014 at 04:11 PM..
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08-30-2014, 02:24 PM	#2
Overpar56 Proud AARP member in good standing 28 Rep 635 Posts Drives: Me nuts Join Date: Oct 2013 Location: Skyline, Chile iTrader: (0)	No codes being thrown? __________________ 2012 135i DCT, Lemans Blue/black leather, PPK1, PE, Stoptech Sport rotors and Sport pads, unhealthy crackles and burbles and an aging demonic driver.
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08-30-2014, 09:53 PM	#3
NYHoustonman Private First Class 19 Rep 140 Posts Drives: 2009 135i Dinan S3 Join Date: Aug 2012 Location: San Jose, CA iTrader: (0)	No codes, no hesitation.
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09-18-2014, 04:12 PM	#4
NYHoustonman Private First Class 19 Rep 140 Posts Drives: 2009 135i Dinan S3 Join Date: Aug 2012 Location: San Jose, CA iTrader: (0)	Update - fixed!
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09-18-2014, 04:17 PM	#5
Ed P Second Lieutenant 29 Rep 277 Posts Drives: 2016 Z4 Sdrive28i Join Date: Jul 2014 Location: St. Petersburg, FL iTrader: (0)	Great news, and thanks for reporting back! __________________ 2016 Z4 Sdrive 28i Black Sapphire Metallic over Black Kansas Leather ... gone but never forgotten ... 2013 135i M-Sport Mineral Gray over Oyster Boston Leather
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09-18-2014, 04:37 PM	#6
edisapimp Civil Rights Activist 115 Rep 949 Posts Drives: E46 Sedan, E88 Vert Join Date: Apr 2013 Location: Long Island iTrader: (0)	Can't wait to get this done.. I just have to get my behind down to oceanside. __________________ E88 Crimson Red Vert MSport 6MT - Listing your mods in your signature is lame. BMS DCI/MHD E30 Flash!!/AA Sport FMIC/VRSF CP w Tial BOV/VRSF 3" DPs/550i clutch w SPEC SMFW/Apex EC-7s/Whiteline RSFB/E92 M3 FCAs/Bilstein B12 Pro Kit/VRSF inlets
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09-19-2014, 09:27 AM	#7
rps Captain 35 Rep 609 Posts Drives: 2013 X1 Join Date: May 2009 Location: Pace, Fl iTrader: (11)	I had that done at the dealer on my previous 135i. The result was that piston 6 disintegrated and they had to replace the engine. I can't say the blasting caused it but, I will never try it again. The blown engine was the reason I traded the car, if it had happened 4 months later, the cost would have been ~$20k. __________________ NB8S Past Garage: Z4, 135i. Present Garage: 2013 X Drive X1 2.8i.
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09-19-2014, 08:56 PM	#9
MuNkY6913 The Crowing 111 Rep 2,005 Posts Drives: BMW 135i Join Date: Feb 2010 Location: State College, PA iTrader: (4) Garage List 2009 135i [8.00]	This is what mine looked like when I did it myself with wire brushes and brake kleen. It seemed like It ran better. But I was chasing a misfire and it ended up being o2 sensors so I wasn't really paying attention to performance. Just wanted the misfire gone. Valve cleaning http://www.1addicts.com/forums/showthread.php?t=885774 __________________ 2009 135i : BMS JB4 G5 ISO,CXRacing FMIC Kit,Injen Cold Air Intake,Evolution Raceworks Charge Pipe,Walboro Inline Fuel Pump, E85 BMS Backend Flash w/ 60% E85,BMS Meth injection (trunkmount),BMS dual meth nozzles,Spec stage 2+ clutch w/ steel SWFW,BMS Catless Downpipes,Berk Tech Race Axleback
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09-20-2014, 03:27 AM	#10
delta-9-ginseng OG Tray Deee 82 Rep 261 Posts Drives: BMW 135i & F36 435i Join Date: Jul 2011 Location: LA and SF iTrader: (0)	how much did it run you?
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