anyone had walnut blasting covered under cpo?

babbagandu · 03-31-2014, 09:52 AM

My 09 has 56k miles and after reading some of the great comments about walnut blasting I want to get it done. I just recently bought the car and put in a cobb stage 1 aggressive tune. I feel like the throttle response is iffy sometimes and also that the engine has random vibrations sometimes when idling (almost like a misfire that lasts a split second), and i feel like this is more noticeable after the tune. I'm thinking maybe it's time for a walnut blasting as I'm assuming the previous owner never had it done.

I'm wondering if you all think that walnut blasting may be the solution to this and if anyone knows if it's possible to get this done under CPO?

3dirty5 · 03-31-2014, 09:59 AM

hey babbagandu!, first of all congrats on the Cobb tune!, i guess thats an entry way drug into this mod world here! hahah.

well the answer really does depend on your dealer! If the dealer does notice the misfire and the rough idleing and really cant seem to fix it then yes they might consider the walnut blasting, ( had this done on my 750li), but regardless if they don't do it I highly recommend getting this done, however this is all IMO

The car will feel great after the walnut blasting and with over 50k miles on you N54 Its deff time to " get er done"! YMMV

techwhiz · 03-31-2014, 10:21 AM

They might, but only if there is a noticeable drivability issue.
Car has to be running rough with no apparent reason.
Typically heavy buildup will also cause intake valves not to fully close. This is where power loss comes from.

My car had a full upper rebuild do to leaky valve seals and buildup.

03-31-2014, 09:52 AM	#1
babbagandu New Member 3 Rep 21 Posts Drives: 335i coupe Join Date: Mar 2011 Location: USA iTrader: (0)	anyone had walnut blasting covered under cpo? My 09 has 56k miles and after reading some of the great comments about walnut blasting I want to get it done. I just recently bought the car and put in a cobb stage 1 aggressive tune. I feel like the throttle response is iffy sometimes and also that the engine has random vibrations sometimes when idling (almost like a misfire that lasts a split second), and i feel like this is more noticeable after the tune. I'm thinking maybe it's time for a walnut blasting as I'm assuming the previous owner never had it done. I'm wondering if you all think that walnut blasting may be the solution to this and if anyone knows if it's possible to get this done under CPO?
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03-31-2014, 09:59 AM	#2
3dirty5 New Member 1 Rep 8 Posts Drives: 2009 335 Join Date: Jul 2009 Location: VA iTrader: (0)	hey babbagandu!, first of all congrats on the Cobb tune!, i guess thats an entry way drug into this mod world here! hahah. well the answer really does depend on your dealer! If the dealer does notice the misfire and the rough idleing and really cant seem to fix it then yes they might consider the walnut blasting, ( had this done on my 750li), but regardless if they don't do it I highly recommend getting this done, however this is all IMO The car will feel great after the walnut blasting and with over 50k miles on you N54 Its deff time to " get er done"! YMMV
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03-31-2014, 10:21 AM	#3
techwhiz Colonel 454 Rep 2,973 Posts Drives: e90 335i Sedan - Arctic Join Date: Feb 2012 Location: Bay Area, Ca iTrader: (4)	They might, but only if there is a noticeable drivability issue. Car has to be running rough with no apparent reason. Typically heavy buildup will also cause intake valves not to fully close. This is where power loss comes from. My car had a full upper rebuild do to leaky valve seals and buildup. __________________ Arctic Metallic\CF Splitters, Spoiler, Mirror Covers\LED Tails\LSD\Tinted\Coded\Apex Square SM10-19"\LED Angel Eyes\Gloss Black Grill\Integrated V1 & Galaxy Tab\M-Performance Brakes\Cobb Tuned\xHP Flash\Resonator Removed and -> is your friend.
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