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Old 04-06-2012, 07:38 AM   #1
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Power washing engine starts fire!

Never heard of this before. Of course I'm so new at this I learn something new every day! From the Tiffin board.

"Seems that Dazzling Detail was washing the coach, while using the high pressure to wash the engine compartment they soom how caused a fuel leak. There was a short/spark and started the fire. Had to have a service man come out to disconect the fuel line to stop the leak."
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Old 04-06-2012, 11:28 AM   #2
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I can think of a couple of ways that could happen....

True story.. No fire.. Some years ago I had some work done, they did an oil change as part of the work,, Well to put the oil in they pulled on a fuel line, A mile or so out of the shop the line popped out where steel met rubber going to the carb and sprayed gasoline all over my just barley warmed engine,,,, I got it shut down (Safely) repaired the break (Put it back together) and let it air out well before Re-starting (Let the gasoline evaporate and dissapate)

A high pressure washer COULD hit that same hose with enough pressure to pop the fitting. I mean.. it will etch concrete.
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Old 04-06-2012, 12:45 PM   #3
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Never heard of this before. Of course I'm so new at this I learn something new every day! From the Tiffin board.

"Seems that Dazzling Detail was washing the coach, while using the high pressure to wash the engine compartment they soom how caused a fuel leak. There was a short/spark and started the fire. Had to have a service man come out to disconect the fuel line to stop the leak."
Gas or diesel?
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Old 04-06-2012, 12:51 PM   #4
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NEVER use high pressure to wash down an engine... Never, never, never... Theres a reason the 'engine soak' setting at the local car wash is basically just a trickle....
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Old 04-06-2012, 12:57 PM   #5
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NEVER use high pressure to wash down an engine... Never, never, never... Theres a reason the 'engine soak' setting at the local car wash is basically just a trickle....
Good advice. In fact, I never use a power washer on the MH. If not very careful, it can do some damage.
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Old 04-06-2012, 02:02 PM   #6
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It's a Diesel. 2010 or so Tiffin staying at Riverbend RV Park in FL.
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Old 04-26-2012, 06:09 AM   #7
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Anyone ever see diesel fuel ignite with a spark ? Can't happen, flash point much to high, lowest flash for diesel 100 F, Gasoline -45 F a spark did not start this problem. Washing a cold Diesel Engine with a pressure washer is done every day in the construction trade.
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Old 04-26-2012, 06:39 AM   #8
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NEVER use high pressure to wash down an engine... Never, never, never... Theres a reason the 'engine soak' setting at the local car wash is basically just a trickle....
Somebody needs to tell this to the OTR truck washes that power wash diesel engines all day everyday.
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Old 04-26-2012, 06:39 AM   #9
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It depends on the diesel. I have a couple Ford 6.9 and 7.3 diesels and there is a valley pan at the top of the engine that drains directly into the oil sump.
Putting water on the engine is the same as pouring it into the oil filler neck.
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Old 04-26-2012, 10:24 AM   #10
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Quote:
Originally Posted by Full.Monte
It depends on the diesel. I have a couple Ford 6.9 and 7.3 diesels and there is a valley pan at the top of the engine that drains directly into the oil sump.
Putting water on the engine is the same as pouring it into the oil filler neck.
So if you end up going through a puddle that is deeper than expected, you have to check your oil to verify that it did not get water in it?
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Old 04-26-2012, 12:23 PM   #11
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A power washer is never used on my vehicles. Too much chance of damage.

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Old 04-26-2012, 12:51 PM   #12
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Interesting
Been using pressure washers to clean engines and engine compartments for over 40 years, both gas and diesel, but then I do know how and how not to use a pressure washer.
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Old 04-26-2012, 01:40 PM   #13
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Car wash engine degreaser is applied at low pressure around 10 to 15 PSI, then sprayed off at a must higher PSI. What would the front of your car ( fenders, hood, windshield ) look like with the degreaser cycle set on high pressure. Only thing is this coach was not sprayed with degreaser, it was washed with clean rinse water at 1,250 PSI held a few feet away from a ice cold Diesel Engine to clean road dust. Also owner was sitting at back of coach, not that it makes any difference. Fire didn't start for 5 to 10 minutes after Engine was washed. The company that was washing this coach has washed somewhere around 10,000 coaches in 17 years with one Engine Fire = .0001 percent. The fellow with the Ford truck better not drive in the rain, or change oil a lot. The fire investigator will be at Coach in the next week or so, maybe then the real reason will be discovered. It won't be from water on Engine. My 2 cents and that all its worth, it will be electrical with the water shorting something out.
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Old 04-26-2012, 02:26 PM   #14
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If a high pressure wash caused a problem on that diesel engine I would think there was a problem there that would of shown up regardless. Like maybe a bad fuel line or such. I have power washed otr truck engines and pickup and car engines for years with no problems. The gas engines you got to watch out for the distributor, and basicly use some common sense where you are spraying and how close you get the nozzle.
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