When running, my truck has a constant ticking noise. Its especially noticeable at idle. At first I thought my exhaust might be a little loose, but i checked it and it seems tight, so what do i do next? Where is it coming from?? Could it be the valves or lift pump?

 

My brother's did the same thing, you could really hear it back by where the bed and cab met. Crawl underneth with something you can put up to the fuel lines and your ear (screwdriver comes to mind), if you hear it tapping in the fuel lines, the most likely thing it could be is the lift pump then after that the overflow valve.

 

wow mine is doing the same thing....

 

mine too seems to be coming from the front on the engine

 

Lift pmps are high on the probability list. Take an old heater hose about 2 feet long and hold one end to the pump and the other end to your ear (the clean end). If it is making the noise you will hear it loud and clear. If not keep going around the eng until you locate it.

 

After a new lift pump and two new overflow valves it still ticks. I have just grown to deal with it.

 

Well that makes me feel good

 

Read some of my past posts on "ticking". Most of the guys that have been driving these 94 and up 12V's since 94 tend to have the same idea about it. They all tick now and then, sometimes it is worse than other times.

 

Mine ticks too, espes. around 1500rpms, valve adj. did nothing for it, so i guess its the lift pump

 

Mine was ticking yesterday at about 1500 rpms and today its not ticking at all.

 

The only time mine had a tick was a few days before the lift pump failed. I have around 40,000 miles on the new eng without any ticking. Gotta be somethig in the check valves inside the pump. I put a carter pump on mine. maybe they have a different style check valve or seat.

 

Every time mine ticks it's been the overflow valve.
I got my last one from Piers.
It's ben holding up well since I've been changing my fuel filter more often.

SFB
Keep you fuel filter changed !