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Old 12-02-2016, 01:04 PM   #1
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Engine Cleaning

Can anyone who has cleaned their diesel engine offer any recommendations and procedures?
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Old 12-02-2016, 01:10 PM   #2
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Engine Cleaning

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Old 12-02-2016, 01:39 PM   #3
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Other than backing into the river, it's no different than washing the engine in your car. Pressure washer or car wash, your choice.
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Old 12-02-2016, 01:43 PM   #4
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Sorry couldn't resist😊.
some people will do anything to get a waterfront site......
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Old 12-02-2016, 06:58 PM   #5
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I've been told by more than a couple mechanics to NOT pressure wash your car/truck engine - too easy to get water into things that aren't supposed to have water in/near them, especially under pressure.
I have a 2006 Tundra (since new) and the engine is a little dusty but I have resisted washing it - no problems since purchase.
I now own a DP Coach and am not sure what I am looking at when looking at this diesel engine but before I stick a pressure washer in there I want some advise from a mechanic.
My $.02
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Old 12-02-2016, 07:06 PM   #6
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Engine Cleaning

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Originally Posted by RKins View Post
I've been told by more than a couple mechanics to NOT pressure wash your car/truck engine - too easy to get water into things that aren't supposed to have water in/near them, especially under pressure.
I have a 2006 Tundra (since new) and the engine is a little dusty but I have resisted washing it - no problems since purchase.
I now own a DP Coach and am not sure what I am looking at when looking at this diesel engine but before I stick a pressure washer in there I want some advise from a mechanic.
My $.02

I am a licensed mechanic since 1968. Pressure wash your engine and if you wish, take an air hose and blow the water away from any electrical connectors. Your choice. Automotive systems are designed to withstand almost anything you can throw at them.
In the old days of open ignition systems you would maybe remove the distributor cap and blow the moisture out but in today's world, start it up and drive it away. My .02$ worth.
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Old 12-02-2016, 07:17 PM   #7
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I've been spraying the engine bay down with simple green and pressure washing for years on all my vehicles including our recently acquired DP. Never had an issue. However, I do run them right after to dry them out a bit. I don't think I'd wash it down and let it sit, I had a set of alternator bearings lock up on a truck that sat hoodless for a couple weeks once.
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Old 12-02-2016, 07:36 PM   #8
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The rear engines in diesel pushers get blasted with water, rocks, sand, and other road debris from the wheels every time you drive. The air intake and exhaust are piped to the outside of the vehicle so it is impossible to get water into those from the engine compartment. I wash my engine as needed and never had a problem over many, many (40+ ) years. As suggested by others, I start the engine immediately and drive/run the engine till the engine is dry.

If you have a rear radiator engine (I hope not as they are a problem), you will eventually need to clean the radiator from the top of the engine because the aforementioned road debris will clog the radiator and cause overheating on long pulls. When you try to clean this you need to cover everything in the room above the engine as the blowback will cover everything including the operator. For this reason, I let my mechanic do this task.

This brings up the caution that if you clean the engine from the bottom, take care not to directly spray the hatch seal. These are notoriously leaky and you might cover the room above in spray.

Have fun with your clean engine. By the way diesel engines seldom NEED cleaning. I clean mine to make it easier to work on and keep the turbine linkage clear.
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Old 12-02-2016, 07:58 PM   #9
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By the way diesel engines seldom NEED cleaning. I clean mine to make it easier to work on and keep the turbine linkage clear.
Just finished a trip out west......lots of dust.....i cleaned the top pretty good with a shop vac and brush......flushed the rear rad from inside the bedroom and outside from the back...... the lower part of the engine isn't too bad but could use some attention....I'm fiddling with the idea of an engine wash----not sure I'm committed to it yet.

Just had the engine, genset, and chassis serviced today at cummins power-south in west palm......

thanks for all the responses

rich
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