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Old 03-04-2015, 08:10 AM   #1
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Fuel Tank Rollover Valves??

A source has suggested that a problem with fuel tank rollover valves in some CC's may be the source of my intermittent check engine lights along with the low fuel pressure error codes.

What are fuel tank rollover valves and has anyone else with a CC had them replaced? Are these simply check valves in the supply and return lines?
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Old 03-04-2015, 10:07 AM   #2
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Fuel tank rollover valve? Never heard of that one. Best to get hold of Kevin or Butch
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Old 03-04-2015, 11:25 AM   #3
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Fuel tank rollover valve? Never heard of that one. Best to get hold of Kevin or Butch
Butch referred me to Kevin.... waiting for his response.
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Old 03-04-2015, 11:39 AM   #4
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Fuel roll over valve

Hi,

Roll over valve is an installed valve on top of the fuel tank. In case the vehicle gets involved in a accident where the vehicle will roll over and land upside-down, the "roll over valve" will shut down the fuel system so that fuel will not spill out of the fuel tank. This is protection against a potential fire in cases like this. If the check engine light comes ON because of this valve being defective, the best advice is to have the valve replaced.
Not sure there is one on my coach, or any coach for that matter.

Luck,

Bob
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Old 03-04-2015, 12:54 PM   #5
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I can say with certainty that my Country Coach does not have a rollover valve.
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Old 03-05-2015, 09:50 AM   #6
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In your box of manualls, you should find some literature on the fuel tank. Give them a call and see what they say
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Old 03-10-2015, 07:45 AM   #7
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Well according to CC, I do have rollover valves on the fuel tank vents. However, they say issues with some valves were in earlier model years....2002-2003.

I'd rather be beat with a big stick than to have to take the bedroom apart again so Cummins can access the top of the engine, but I guess if I am going to find the issue for the fuel delivery problem, I'm going to have to take the coach back there.

At this point, I'm missing my old CAT 3126E which was never in the shop for anything other than routine maintenance in 8 years of ownership.
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Old 03-10-2015, 11:05 AM   #8
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Before going back and spending big $$$, why don't you get a spare fuel cap and drill a hole in it to vent the tank?

Just a thought
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Old 03-10-2015, 04:43 PM   #9
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Before going back and spending big $$$, why don't you get a spare fuel cap and drill a hole in it to vent the tank?

Just a thought
Now that is a Great idea!

I'll file it in one of my ever decreasing memory banks.

Hope it is the solution to a stuck check valve.
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Old 03-10-2015, 09:51 PM   #10
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Since I have fuel fills on both sides of the coach, I would think there is a vent on both and rollover valves on both. Hard to image both valves might be sticking.

Regarding the idea of drilling a hole in a fill cap, CC Tech Support warned me that a loose filler cap might cause a check engine light. Would drilling the cap produce the same result as a loose cap?
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Old 03-10-2015, 10:51 PM   #11
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What codes are you seeing for the Check Engine light?
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Old 03-10-2015, 11:13 PM   #12
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Since I have fuel fills on both sides of the coach, I would think there is a vent on both and rollover valves on both. Hard to image both valves might be sticking.

Regarding the idea of drilling a hole in a fill cap, CC Tech Support warned me that a loose filler cap might cause a check engine light. Would drilling the cap produce the same result as a loose cap?
How the heck do I know!!
You are assuming that the "roll over" valves are sticking causing your light. Do you really think that both valves would stick at the same time??

Would not a loose fuel cap give the same indication as a roll over valve?? Both would be open until a situation that would shut the valve.

If you relieve any vacuum, which might be caused by stuck roll over valves, by drilling a hole in the fuel cap, that will eliminate any issue of a vacuum caused by these rare chinchilla "roll over valves".

At this point, I think CC is blowing some smoke up someone's shorts
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Old 03-11-2015, 06:48 AM   #13
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What codes are you seeing for the Check Engine light?
Silverleaf code 157 (same as Cummins 559) which is a generic low fuel pressure code. Cummins said it can be anything related to fuel delivery and diagnostics is extensive, especially if the codes are intermittent. I have loss of power whenever this happens. Based on the Silverleaf history, this error code has appeared many, many times but I've only had the check engine light and engine de-rate about four times. In all cases, it cleared with no intervention other than letting the coach sit for a few hours.
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Old 03-11-2015, 12:52 PM   #14
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Silverleaf code 157 (same as Cummins 559) which is a generic low fuel pressure code. Cummins said it can be anything related to fuel delivery and diagnostics is extensive, especially if the codes are intermittent. I have loss of power whenever this happens. Based on the Silverleaf history, this error code has appeared many, many times but I've only had the check engine light and engine de-rate about four times. In all cases, it cleared with no intervention other than letting the coach sit for a few hours.
I have been fighting a similar P0440 code on my Lexus. Fuel system problem with lots of possible cures. New gas cap didn't help and checked all suggested hoses ,etc.

Last thing I did was clean the edges of the hole really good where you stick the gas nozzle in and coated it and the gas cap O ring with silicon spray. Seems to have cleared it up so far.
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