Put your CR Pressure Relief Valves back in! - Page 2 - Dodge Diesel - Diesel Truck Resource Forums

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Put your CR Pressure Relief Valves back in!

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Old 12-02-2009, 12:32 PM
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Do these pressure relief value only go south on big horsepower trucks?
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Old 12-03-2009, 07:30 AM
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Originally Posted by AlCorr View Post
Maybe I'm the idiot, I've got no idea what a pressure is, what it does or where it goes. So I did a search on line. Is this a pressure relief value? And is this a good price?

http://www.thoroughbreddiesel.com/dr...ief-valves.htm

Did I mess-up big time posting a add from someone that's not a sponsor, sorry, I'd like to apology to all the sponsor's, sorry.
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Old 12-03-2009, 05:35 PM
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Originally Posted by AlCorr View Post
Did I mess-up big time posting a add from someone that's not a sponsor, sorry, I'd like to apology to all the sponsor's, sorry.
that PRV from Dr Performance is a Block Off. (Rail Cap)
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Old 12-03-2009, 05:46 PM
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What Doug said above, that is precisely what you want to avoid. Oh and no you did nothing wrong
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Old 12-10-2009, 01:15 AM
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I wish someone made a quality valve that didn't wear out so fast. Imagine if wastegates failed as quick as these valves do. Air and Fuel are two different things especially when talking about these extreme rail pressures. But how wonderful if you could get a valve meant to open 1000's and 1000's of times before ever wearing out and be tuneable like a wastegate. What a solution to our problem. Set it at your max desirable rail pressure and forget it. Then just keep your cruising RP below 20K and your injectors would love you.
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Old 12-10-2009, 10:45 PM
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i agree suposedly we can put men on the moon but nobody can build a reliable rpv.
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Old 12-11-2009, 03:45 PM
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Its Friday afternoon and this weeks count of cracked injector bodies stands at 8. Thats 8 sets with one cracked injector each this time. Counting downtime, lost revenue, repair costs, etc you have quite a bit of cash there.
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Old 12-12-2009, 04:31 PM
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What if one has a dual feed line, shouldn't the pressure backfeed a little and spare the injectors?
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Old 12-19-2009, 01:17 PM
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i have dual feed line and i can say when i lift the truck surges and i think its because the pressure is feeding back down but i am not for sure. where exactly is the relief valve on the rail? is it uder where that line feeds back to the fuel canister? If so i migth be in trouble as that line split and cracked open so we took it off and blocked the hole and now there is no line going back towards the fuel canister.
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Old 12-19-2009, 01:24 PM
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Originally Posted by SMOKIN-U View Post
i have dual feed line and i can say when i lift the truck surges and i think its because the pressure is feeding back down but i am not for sure. where exactly is the relief valve on the rail? is it uder where that line feeds back to the fuel canister? If so i migth be in trouble as that line split and cracked open so we took it off and blocked the hole and now there is no line going back towards the fuel canister.
It's right next to the pressure sensor.

And I'm glad I don't have to worry about such a high relief. You guys and your dual pumps and large injectors. Hope you like wasting all you money.
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Old 12-20-2009, 10:41 PM
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This is some good advice it sounds like
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Old 12-23-2009, 12:04 PM
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Well Don, I'm glad you said something, as i was just about to get one for mine. Thanks, I think I'll just replace my relief valve with a new one.
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Old 01-07-2010, 11:59 AM
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Hope everyone who disagreed with me about the wisdom of rail caps takes note of this.
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Old 01-07-2010, 03:34 PM
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Originally Posted by XLR8R View Post
Hope everyone who disagreed with me about the wisdom of rail caps takes note of this.
We are only talking about rail caps(in place of the PRV) aren't we, not dual feed lines??? I can see capping a rail being a bad idea, but dual lines can at least back flow right? I'm asking the same thing again here as above.
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Old 01-07-2010, 04:21 PM
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Since dual feed lines that use the PRV port on the rail eliminate the PRV by design, the high-pressure side of the system still has no relief - and I wouldn't rely on diesel's compressibility to cushion pressure spikes from hurting the injector solenoids or tips.

Back flow to where?... it's still the same circuit.
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