Forum Discussion
TKMJ
Sep 19, 2007Explorer
professor95 wrote:
On the flip side, some components in gasoline will actually begin to boil at 50 degrees C (120 degrees F, sea level, no pressure). This chacteristic once produced vapor lock in older carbureted engines.
IMHO, I would exercise caution at those temps. Any thing you can do to keep the gas tank cooler would be smart.
Professor95,
You are correct in your take on gasoline. Last year I lost the tail pipe on my class C. The pipe broke behind the front tank but ahead of the rear tank. When the pipe broke, I stopped and removed it and left it at the dumpster at the rest area. I didn't want to leave it on the side of the road. Because the muffler was still intact, I proceeded on my trip. When driving at night, we didn't have any fuel problems because of the cool nights. However during the day, the rear tank fuel lines would vaporlock because the exhaust heat would build up under the coach. The front tank would run just fine because the end of the pipe was behind the front tank. The reason I know this is because when I ran out of gas in the rear tank, (at 1/2 tank) I took a look under the coach to see if the tank valve failed or one of my fuel filters was plugged. I found the glass filter for the rear tank empty while the glass filter for the front tank was full. I also noted how hot the fuel lines were behind the exhaust. They were so hot, I could not touch them without a glove.
Ken
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