Washing the engine? - Jeep Commander Forums: Jeep Commander Forum
Regular Service / Maintenance This section contains discussion about regular service and maintenance (upkeep) of your Jeep Commander

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post #1 of 38 (permalink) Old 09-15-2008, 02:47 AM Thread Starter
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Washing the engine?

Just wondering if any does this, or has, washed out the engine. I know of people who do this on vehicles. I personally have never done this, but did over the weekend wipe it all down a with a damp cloth, since it had plenty of dust and dirt collected from some of my last offroad outings where i had water up in to the motor area. I know there are people in the forum that work at dealer ships and others that may know how the used car dealers take a motor and make it look new again by cleaning it out. I know there are few tricks to doing this, but not sure what they all are with the commander, covering parts ,etc.....
searched but couldnt find any threads on this. Just wondering any thoughts on washing out the engine, good idea, bad idea, otherwise, how to advice advice, etc.

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post #2 of 38 (permalink) Old 09-15-2008, 08:39 AM
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i use the pressure washer at the car wash. they have a spray for the engine, i use that first, let it sit. then i spray it off. keep the sprayer further back so you don't damage anything. don't spray water up your intake. i also like to keep the motor running while i'm spraying it off.
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post #3 of 38 (permalink) Old 09-15-2008, 10:03 AM
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Use a citrus based cleaner (not the old "engine cleaners" that foam up). This will clean the engine nicely, but not damage anything.

pressure washers are nice, but they can blast lose connectors so be careful.
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post #4 of 38 (permalink) Old 09-15-2008, 10:07 AM
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I would avoid Simple Green as a detergent. I used it once to clean my engine on an older car and it turned all the black rubber hoses white. Looked pretty funky, but it didn't actually harm anything.
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post #5 of 38 (permalink) Old 09-15-2008, 10:17 AM
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I use to clean my engine with the old can cleaners - the ones where you heat the engine up, then spray on, they foam and you hose off. These were really harsh, and would remove the dirt nicely, but would make all the plastics look bad. I'd then spray armor all on the hoses, and just let them dry. The engine looked fantastic until I drove around, and dirt would stick instantly to all the armor all I had sprayed on the engine!

Just squirt some citrus cleaner on the engine, then kind that is available at your local auto parts store, then hose it off. use a gentle brush for some hard dirt.
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post #6 of 38 (permalink) Old 09-15-2008, 02:00 PM
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After couple of off-road trip in sand, I used to wash the engine by water get at car wash and trying to avoid the fuse boxes at the right side and concentrate more at the front of the engine where the sand hit more.

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post #7 of 38 (permalink) Old 09-16-2008, 02:10 AM Thread Starter
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I wondered if leaving it run would be a good option. do you think it would be hard on the altenator

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post #8 of 38 (permalink) Old 09-16-2008, 04:53 AM
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I always keep the engine off and try to avoid washing the engine when its warm.

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post #9 of 38 (permalink) Old 09-16-2008, 06:24 AM
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Quote:
Originally Posted by ped4599 View Post
I wondered if leaving it run would be a good option. do you think it would be hard on the altenator
Believe it or not, alternators are basically waterproof. They are designed to survive in a wet environment, as are all components under your hood. If you get mud in your alternator, that can cause problems. Just ask the Ford Escape guys who drive offroad through mud and muddy puddles. Unfortunately for them, their alternators sit very low and are suspectible to damage caused by that type of "mud" driving. I remember reading their a post on their forum a couple of years ago where six or seven of them followed each other on a off-road trail and every one of them had alternator failure after driving through one particular muddy water hole.
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post #10 of 38 (permalink) Old 09-27-2008, 11:44 PM
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Temperature Change

In college, I worked at a car wash/detail shop - and we were always told by the management to NEVER under any circumstances power spray an engine that was currently running, or was still hot.

Their stance on it was that the change in temperature from the cold water, hitting the hot block/engine parts could lead in cracking and damage. Which, if your know your physics is possible but I'm unsure how likely.

I wouldn't risk what was stated above. They make some pretty decent cleaners that you can apply in the driveway after the car has been sitting, and spray them off.
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