2nd Gen Non-Engine/Transmission Rollover Valve on a '98

[CTD12V]

I read some posts on here about the rollover valve on top of the fuel tank becoming bad and causing excess suction in the fuel tank, and as a result placing more stress on the transfer pump, which in turn exacerbates the infamous ticking sound. It was supposed to be a relatively inexpensive part, so I figured I would check at the dealer to see how much a new rollover valve cost. Well, according to the parts counter man, the rollover valve is part of the whole fuel module on the 98 and newer trucks, and the whole unit costs something upwards of $400. Figures.



So, my question is, have any of you been able to troubleshoot/repair the 98 and newer style rollover valves without replacing the whole fuel module? Thanks in advance.



CTD12V

 

[Thomas]

... Well, according to the parts counter man, the rollover valve is part of the whole fuel module on the 98 and newer trucks...

See if your parts person can tell you what these are:

• P/N 52127666
• P/N 4002149

Don't buy a new module.

 

[sstefanini]

Yeah that's ruthless, they also want over a $140 for the 8" of rubber hose that connects the filler to the tank (made from an oddball or metric size that can't be purchased @ any auto parts store).

 

[CTD12V]

Thanks for the P/Ns. I figured there was more to the story. I'll check in to those.



Thanks,



CTD12V

 

[Thomas]

If you plug 52127666 into the search feature of this site you will get several hits.

 

[TPCDrafting]

Mine was sticking a year or two back. I had to replace the fuel sender and while I was under the bed, I squirted some brake clean in the little hole and I haven't had any suction problems since. It just got some dirt/debris buildup, not worth replacing.

 

[w gilmer]

Just Leave Filler Cap A Little Loose!! No More Problems With Pressure Or Vacume.

 

[Bart]

Am I correct in assuming that IF you have pressure at the cap while removing it, you have a problem?

 

[Thomas]

Am I correct in assuming that IF you have pressure at the cap while removing it, you have a problem?

Your assumption is correct.

 

[CTD12V]

Thanks for the tips guys. I have occasional suction at the the filler cap when I remove it to fill up, so I figured it wasn't venting correctly.

... I squirted some brake clean in the little hole and I haven't had any suction problems since.

TPCDrafting, did you have any issues with brake cleaner entering the fuel tank when you cleaned your rollover valve?

 

[TPCDrafting]

If I did, it was less than half a teaspoon amoungst many gallons of diesel

 

[CTD12V]

OK, thanks! I'll give that a try first before I go wrangle with the parts counter man.