Engine/Transmission (1994 - 1998) overflow spring

[RBratby]

how long is the over flow spring in the pump? im going to check mine to see if i need a new one. i am also going to put a new lift pump on the truck. the reason i ask is because i was sitting next to a truck yesterday and i have a small ticking noise. i have change my fuel filter and cleaned the screen in the lift pump. the screen was clean. nothing at all was in there. if it is not that what could it be. thanks

 

[HoleshotHolset]

The ticking noise is usually (traditionally) attributed to the lift pump itself being worn out, etc.



The spring should be about . 50" or so... give or take an ounce. It's better to err on the safe side - a little longer than . 5" won't hurt.



The ticking noise was still there on my '94 after I did the lift pump... but it wasn't as bad. My '98 ticks pretty good, though. I don't want to say that too loud... it's out in the parking lot and might hear me.



Matt

 

[RBratby]

thats funny i will check it out though. is there anything special i need to do? what about the banjo bolt. i was told that there was a replaceable spring and a nonreplaceable spring is this true. can you take out the stock banjo bolt and strech the spring and put in the same banjo or will i have to buy a new banjo? thanks

 

[HoleshotHolset]

Well - the overflow valve is the banjo bolt... or vice-versa.



You'll know right away if your overflow valve is the type that you can take apart and stretch the spring. Just be careful that you don't loose the little ball valve in there when you take out the screw. And don't loose any of the 'gaskets'...



The older trucks had overflow valves that couldn't be taken apart unless you're into drilling it, etc.



Keep in mind that in some trucks you have to grind the cylinder head a bit to get the bolt out... make sure you get rid of all the filings before you crack the banjo bolt/overflow valve. You do NOT want filings/CHiPs near your fuel system... even if it is on the return side.



Matt

 

[RBratby]

i have a 95 ctd. i am assuming that you cant strech the spring. you said early ones could not unless you drill them. i have an early one. thanks for your help.

 

[HoleshotHolset]

Did you look at your overflow valve?



9 times out of 10 you can stretch 'em...



Matt

 

[ndurbin]

my 94 ya couldnt stretch it.

 

[Cooker]

I personally would not use the length of the spring to determine if your fuel pressure is correct. It might get you close but the best and more accurate way would be to check the fuel pressure.



As far as the ticking, both my truck and my fathers used to tick at times. Ever since I fixed the vaccume in the fuel tank, on both, neither have ticked since.

 

[HoleshotHolset]

Ryan's right - you should check your fuel pressure at some point. Just be thankful that you're not dealing with a 24-valve... they have fuel pressure problems right from the factory. Poor guys...



What's the fix for vacuum in the tank? (DeWalt cordless drill?)



Matt

 

[Cooker]

To fix the vaccume I replaced the roll-over valve on the top of the fuel tank. It seems that is gets clogged with junk as the miles accumlate on the truck. It is a relatively inexpensive part, under $20, so that is why I decided to replace it in search for fixing the vaccume in my tank and it worked. I had the same vaccume on my pops truck and a new roll-over valve fixed the problem there too.