Thanks for responding. With n55, the intake mani is an extra pain since the DME is mounted on its underside, so there's all those harnesses to deal with. I've never had it off so maybe it's not that bad, but probably more than I'd want to chew off just to take a look. If I look myself, I'd probably pick up a cheap boroscope and try to go through the throttlebody take take a look. I'll most likely be paying, as I'm super slow on first-time DIY's, and I just can't see making the time to do this in the near future.
N55 / 8HP is a great daily driver. A toaster - put bread in, push lever, wait 60 seconds, out comes toast. It is what I recommend to normies when I get questions on BMW's to buy. I've gotten two friends into N55/8HP X5's, my oldest son just got an N55/8HP X3, my middle son in an N55/8HP F10, my youngest son is the smartest, in an N52 E90 (German Honda) as a daily driver.
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Frankly for a driver, that's not bad advice - pay once to have the intake off/blasted, spend the next walnut blast's money on port injection ... double win ... never go back in again.
Yeah, that is a huge upside to port injection. Just not crazy about the extra parts and controller. If I ever went this route, I think this would be the reason why.
I almost wonder if those cars had some undiagnosed mechanical issue going on contributing to the excess build up?
Even the concept of cooling the DME with charge air... I guess that works well for stock (obviously that's what they designed for) and as long as the charge air temp isn't above any DME component operating temp all the flow through the intake will still pull alot of heat out. Heat will shorten any components life, but this strategy doesn't seem to cause any problems for n55.
The n55s I've blasted were around the 100k mark . And they didn't look to bad but they did have some buildup that the blasting removed. I know a couple people running port injection on their n55s and there intake runners and valves look brand newYeah, that is a huge upside to port injection. Just not crazy about the extra parts and controller. If I ever went this route, I think this would be the reason why.
What have you seen as far as carbon build up on n55's you've torn into? I've seen some people comment they walnut blasted at 60k and the valves looked totally fine when they got in there and didn't need it. Most comments seem to be from people getting it done only to discover they didn't need it yet. There are exceptions that look pretty bad already at that point, but from my searching those cars seem more rare
I'm going to have to make some time poke around a bit and see what's going on.
Yeah, I'm annoyed with that... It was $800 for the blast. Kinda high, but i've seen some people post they've been quoted up to $1000 so it could have been worse. I originally made the appointment to refresh my transmission fluid/pan/mechatronic sleeve for preventative maintenance, so I decided to do the blast as well to save a trip.Dang thats no good that there's a new leak. How much did they charge for a n55 blast ?
