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Is Walnut Blasting as important on non-turbo N52 as the N54??
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| 09-17-2015, 04:17 PM | #1 |
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Is Walnut Blasting as important on non-turbo N52 as the N54??
I know the Turbo direct injection N54 engine builds up a fair amount of crud... I'm sure same crud builds up a bit on the N52 (my car is the 2006 330i) but is it to the same levels and needs??
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| 09-17-2015, 04:36 PM | #2 |
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The N52 engine in E90 BMWs is port injection, so our valves are "cleaned" off with each injection of gasoline. However, eventually any valve will probably get some carbon build-up especially with variable timing and sub-optimal conditions as the engine ages. It just happens a lot faster with direct injection since the fuel isn't sprayed on the back. I wouldn't imagine it being much of a concern for our N52s though.
http://www.underhoodservice.com/dire...rbon-deposits/
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| 09-17-2015, 05:17 PM | #3 |
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No need to walnut blast a port injection engine. The fuel cleans the valves, I'd bet they're near spotless.
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| 09-18-2015, 09:36 AM | #4 |
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As said above, not necessary on the NA engines!
 This was what the intake ports on my 330i looked like when I replaced the DISA actuators and the intake was off:      
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| 09-18-2015, 10:53 PM | #6 | |
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Quote:
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| 09-21-2015, 03:12 AM | #7 |
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Your engine must surely be port injected. If it was DI, then it would be much worse (even if NA)...
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