Washing The Engine - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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#1 (permalink) Old 05-24-2005, 11:59 AM
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I wanted to do like an engine degreaser under the hood, i've got a 95 325is, do i have to cover anything up, before washing it or do not wash it at all, any advice, just want it to look a little clean under the hood, thanks
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#2 (permalink) Old 05-24-2005, 05:55 PM
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I use Greased Lightning, let it sit for a little bit then hose it off (no nozzle) with a slow easy steam of water from the hose, finish off with some Armor All on the hard plastic. Only place I'm really careful with is around the fuse box and around the throttle housing area since there seems to be some exposure there. Also be easy with the water above where the coils are. The cover should protect them but just be easy with the water there.

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#3 (permalink) Old 05-24-2005, 06:07 PM
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Quote:
Originally posted by fredo328@May 24 2005, 03:55 PM
I use Greased Lightning, let it sit for a little bit then hose it off (no nozzle) with a slow easy steam of water from the hose, finish off with some Armor All on the hard plastic. Only place I'm really careful with is around the fuse box and around the throttle housing area since there seems to be some exposure there. Also be easy with the water above where the coils are. The cover should protect them but just be easy with the water there.
[snapback]347555[/snapback]

Sounds like good advice to me. Even if you don't use the degreaser every time (I don't - it can attack some plastics - read the label), I use the Armor All everytime. Drives me nuts when I lift the hood and see a peanut field where the engine should be. Most of the conections that I've seen under the hood of a BMW were protected with high-end connectors that were highly water resistant. Should be no problem.
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#4 (permalink) Old 05-25-2005, 01:23 AM
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Quote:
Originally posted by RDRAIDR+May 24 2005, 04:07 PM--><div class='quotetop'>QUOTE(RDRAIDR @ May 24 2005, 04:07 PM)</div><div class='quotemain'><!--QuoteBegin-fredo328@May 24 2005, 03:55 PM
I use Greased Lightning, let it sit for a little bit then hose it off (no nozzle) with a slow easy steam of water from the hose, finish off with some Armor All on the hard plastic. Only place I'm really careful with is around the fuse box and around the throttle housing area since there seems to be some exposure there. Also be easy with the water above where the coils are. The cover should protect them but just be easy with the water there.
[snapback]347555[/snapback]

Sounds like good advice to me. Even if you don't use the degreaser every time (I don't - it can attack some plastics - read the label), I use the Armor All everytime. Drives me nuts when I lift the hood and see a peanut field where the engine should be. Most of the conections that I've seen under the hood of a BMW were protected with high-end connectors that were highly water resistant. Should be no problem.
[snapback]347559[/snapback]
[/b][/quote]

What about a 318i M42 engine?
I've heard stories about protecting the alternator as well on my car that seems to be exposed alot...also what about the spark plug block...that is dusty on my car is that hose-able?

thanks

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#5 (permalink) Old 05-25-2005, 01:42 AM
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Yes, on the 318i's M42 and M44 engine, be careful with water and that alternator, I read that in my Bentley Manual I think... well it's exposed so be careful.

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#6 (permalink) Old 05-25-2005, 10:34 AM
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As others have suggested, be careful arond the Throttlebody, fusebox, and the ignition coils.

When I did the cleaning recently, I removed the air box I used ziplock bag to cover up the exposed intake boot. I used "Simple Green" concentrated solution. It is amazing. I used the power washer with the nozzle as far away from the engine bay as possible.

As for covering the alternator, I didn't. My reasoning is that my alternator gets wet when I drive during rain because it is located almost at the bottom and there is no plastic covering underneath ('97 328i). So, if driving through rain doesn't hurt it, then my washing can't hurt it.

good luck
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#7 (permalink) Old 05-25-2005, 03:36 PM
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Quote:
Originally posted by pcy@May 25 2005, 08:34 AM
As others have suggested, be careful arond the Throttlebody, fusebox, and the ignition coils.

When I did the cleaning recently, I removed the air box I used ziplock bag to cover up the exposed intake boot. I used "Simple Green" concentrated solution. It is amazing. I used the power washer with the nozzle as far away from the engine bay as possible.

As for covering the alternator, I didn't. My reasoning is that my alternator gets wet when I drive during rain because it is located almost at the bottom and there is no plastic covering underneath ('97 328i). So, if driving through rain doesn't hurt it, then my washing can't hurt it.

good luck
[snapback]347709[/snapback]
On the Alternator, I agree. In fact, seems to me that the dirtier you leave it, the worse it would be for the brushes, bearings, bushings - whatever. We're not talking spraying with salt spray nor would I recommend super high pressure washers. The simple green or other degreaser and a shower from the water hose should do. Don't forget to clean the radiator from those mounds of bugs - soak with water and degreaser, if you want, and use a soft nylon brush. Straighten the bent metal. A little care now could save big bucks later.
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#8 (permalink) Old 05-25-2005, 07:12 PM
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Quote:
Originally posted by RDRAIDR+May 25 2005, 11:36 AM--><div class='quotetop'>QUOTE(RDRAIDR @ May 25 2005, 11:36 AM)</div><div class='quotemain'><!--QuoteBegin-pcy@May 25 2005, 08:34 AM
As others have suggested, be careful arond the Throttlebody, fusebox, and the ignition coils.*

When I did the cleaning recently, I removed the air box I used ziplock bag to cover up the exposed intake boot.* I used "Simple Green" concentrated solution.* It is amazing.* I used the power washer with the nozzle as far away from the engine bay as possible.

As for covering the alternator, I didn't.* My reasoning is that my alternator gets wet when I drive during rain because it is located almost at the bottom and there is no plastic covering underneath ('97 328i).* So, if driving through rain doesn't hurt it, then my washing can't hurt it.*

good luck
[snapback]347709[/snapback]
On the Alternator, I agree. In fact, seems to me that the dirtier you leave it, the worse it would be for the brushes, bearings, bushings - whatever. We're not talking spraying with salt spray nor would I recommend super high pressure washers. The simple green or other degreaser and a shower from the water hose should do. Don't forget to clean the radiator from those mounds of bugs - soak with water and degreaser, if you want, and use a soft nylon brush. Straighten the bent metal. A little care now could save big bucks later.
[snapback]347778[/snapback]
[/b][/quote]

although it may be different in your vehicles, in my 89 325i when my expansion tank cracked and sprayed coolant over the alternator, the alt shorted out and had to be replaced.

water isnt good for an alt.. just be safe and put a plastic bag over it.. better safe then sorry?

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#9 (permalink) Old 05-25-2005, 08:29 PM
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water while there is a current going thru it probably had something to do with it. What ever you guys do just let the car sit for a while to air dry before driving it, that should minimize any possible damage from water getting where it shouldnt

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#10 (permalink) Old 05-25-2005, 10:30 PM
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cool, thanks everyone for the advice
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#11 (permalink) Old 05-25-2005, 11:41 PM
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i use a few tricks to get the engine clean, but you have to be mindfull of wiring and whatnot when doing it. use simple green to clean the engine, its enviro friendly and does a good job, than i do a detailing job, and yes i do use wd-40 (not too much , just a bit to give you a nice shine)

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#12 (permalink) Old 05-30-2005, 09:53 AM
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To finish it up after the cleaning job you can spray the rubber parts (even the metal parts) with silicon spray. It protects for dry out rubbers and there will be a shine on those parts too! I did use wd-40 before but it attracts sand and dirt.

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#13 (permalink) Old 05-30-2005, 10:35 AM
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Quote:
Originally posted by dutchbmw@May 30 2005, 07:53 AM
To finish it up after the cleaning job you can spray the rubber parts (even the metal parts) with silicon spray. It protects for dry out rubbers and there will be a shine on those parts too! I did use wd-40 before but it attracts sand and dirt.
[snapback]348810[/snapback]
What kind of silicon spray? I'll try that if I know what to get

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#14 (permalink) Old 05-30-2005, 11:38 AM
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Quote:
Originally posted by fredo328+May 30 2005, 04:35 PM--><div class='quotetop'>QUOTE(fredo328 @ May 30 2005, 04:35 PM)</div><div class='quotemain'><!--QuoteBegin-dutchbmw@May 30 2005, 07:53 AM
To finish it up after the cleaning job you can spray the rubber parts (even the metal parts) with silicon spray. It protects for dry out rubbers and there will be a shine on those parts too! I did use wd-40 before but it attracts sand and dirt.
[snapback]348810[/snapback]
What kind of silicon spray? I'll try that if I know what to get
[snapback]348819[/snapback]
[/b][/quote]

I didn't know of different kinds of silicon spray. The description on the spray can says it has lubricating properties, it protects for corrosion and disposes dirt.

Good luck!

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#15 (permalink) Old 05-31-2005, 01:34 PM
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Thanks

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