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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wash, Wax, Detailing and Cosmetic protection/repairs > Right way of cleaning 335i engine....



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      04-12-2010, 05:46 PM   #1
LCIr
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Right way of cleaning 335i engine....

Any thoughts and help???

Thanks!
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      04-12-2010, 05:52 PM   #2
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Here is what I do. Squirt some Simple Green or one of the citrus based cleaners all over the engine bay with a cool engine. Scrub lightly on any particularly gubby spots. Rinse off with water from the hose without a nozzle (no high pressure). Then blow off excess water with a leaf blower. Apply some 303 Aerospace Protectant to plastic bits then wipe it down.
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      04-14-2010, 11:29 PM   #3
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Here is what I do. Squirt some Simple Green or one of the citrus based cleaners all over the engine bay with a cool engine. Scrub lightly on any particularly gubby spots. Rinse off with water from the hose without a nozzle (no high pressure). Then blow off excess water with a leaf blower. Apply some 303 Aerospace Protectant to plastic bits then wipe it down.
Yep. I just did that the other day. Works great.
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      12-09-2010, 03:57 PM   #4
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This still what everyone would suggest?

I have the cone intake in my car, so rather than the stock intake filtering all the crap, it's being blown everywhere, so it's really dirty. i'm going to put the stock intake back in, any other suggestions on how to clean it? Could I take it somewhere that knows what they're doing?
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      12-09-2010, 04:25 PM   #5
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That above method works fine for me. As long as you don't hose down electrical connections with a 3000psi pressure washer it is hard to do any damage.

This might help:
http://guidetodetailing.com/detailin...g-your-engine/
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      12-10-2010, 12:13 PM   #6
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Thanks Krells
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      12-10-2010, 03:54 PM   #7
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I use the same basic method. I use CG Grime Reaper but any multi purpose APC will work, read the instructions for the dilution level. I use disposal paint brushes to clean the cracks and crevices as they are cheap at Lowes/HD and work as well as detail brushes for the engine. I toss them out once I'm done. Cover the cone with a grocery bag, thats what I do. Never clean a hot engine. Oh and I dress with CG Bare bones(metal and hoses) and 303 for the plastic bits that show(shroud, engine cover, air box).
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      12-11-2010, 01:34 PM   #8
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Be careful with Simple Green. While it works great it may damage the finish on anything aluminum if not rinsed well right away.
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      12-11-2010, 01:59 PM   #9
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Make sure you get rid of all the water somehow. I cleaned my engine one day and figured the heat would evaporate the water but I got a bunch of misfires when I accelerated until the engine warmed up.
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      12-12-2010, 11:19 AM   #10
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Make sure you get rid of all the water somehow. I cleaned my engine one day and figured the heat would evaporate the water but I got a bunch of misfires when I accelerated until the engine warmed up.
I use a leaf blower to blow all the water off. Works well.
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      12-13-2010, 10:55 PM   #11
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What about the under body plastic tray? Does all the water collect there under the engine or does it drain out?
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      12-14-2010, 07:05 AM   #12
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Quote:
Originally Posted by Weaselboy View Post
Here is what I do. Squirt some Simple Green or one of the citrus based cleaners all over the engine bay with a cool engine. Scrub lightly on any particularly gubby spots. Rinse off with water from the hose without a nozzle (no high pressure). Then blow off excess water with a leaf blower. Apply some 303 Aerospace Protectant to plastic bits then wipe it down.
Everyone says what you are, so I'm not contesting it...but, I always feel a physical aversion from putting water in the engine bay. I always feel like the electronics--or some other item like a fuel injector, blah blah etc--will get messed up. Therefore, I've never actually done it. Is this not really a problem?
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      12-14-2010, 03:55 PM   #13
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What about the under body plastic tray? Does all the water collect there under the engine or does it drain out?
It just runs out. No problem.
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      12-15-2010, 01:55 AM   #14
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p21s, detail brush, 303, fade 2 black.
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      12-15-2010, 02:14 AM   #15
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Quote:
Originally Posted by corb View Post
Everyone says what you are, so I'm not contesting it...but, I always feel a physical aversion from putting water in the engine bay. I always feel like the electronics--or some other item like a fuel injector, blah blah etc--will get messed up. Therefore, I've never actually done it. Is this not really a problem?
I feel the same way. How do you know you're not going to get water on the ECU or that it won't seep into all kinds of nasty places? I'd be paranoid about water collecting in the spark plugs or shorting one of the coils or something. Lots of people seem to be comfortable with it, provided that you're not shooting it with 500 psi water, but I'm still too scared to spray water in the engine bay.

I have always just done a spot clean, using a microfiber towel along with some 303/P21S and what not. Of course, I can't get it nearly as clean as hosing it down.
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      12-15-2010, 02:20 AM   #16
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as long as you arent spraying excessive water and directing it in places that you shouldn't be and cover intake, etc. you have NOTHING to worry about.
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      07-24-2014, 10:11 PM   #17
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i just purchased a steam cleaner. link below.
http://dupray.ca/steam-cleaners/tosca-steam-cleaner

can i use this to clean the engine bay without any cleaning solutions. the psi is around 70psi or less but temperature of steam is 316 farenhiet.
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      07-25-2014, 06:58 PM   #18
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Quote:
Originally Posted by LCIr View Post
Any thoughts and help???

Thanks!
Greetings,

Here is a previous post (of mine) regarding how to clean engine and compartment...good luck.

Semper Fi


http://www.e90post.com/forums/showthread.php?t=987144
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      07-25-2014, 07:02 PM   #19
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i wouldn't touch the engine with water, jmho

use a micro fibre towel, cleaning spray (something light that won't leave residue or wax behind), light brush and a can of compressed air... you can clean it up pretty good without water
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      07-28-2014, 07:10 PM   #20
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i leave my car and clients cars running, spray plastic safe degreaser all over and hot water power wash at 1500-1600psi, about 24-36 inches away from surface, then let it air dry somewhat, then wipe down, then touch up anything missed, then apply protectant to all plastic/rubber. Works well no issues, done over 6000 vehicles in 10 years and never had any issue.
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      07-28-2014, 07:13 PM   #21
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Heres one that only a 2000psi hot water/degreaser could tackle lol:



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      07-31-2014, 09:15 AM   #22
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Here is good process for cleaning the engine.

http://www.autogeekonline.net/forum/...fessional.html
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