What is this noise?

Lumpskie · Post by **Lumpskie** » Sat Mar 28, 2015 7:32 am

Hey guys,

So I started the Wagoneer yesterday and it started making a loud ticking noise. I felt around under the hood and it seems like it's coming from an assembly related to emissions(?) located directly behind the power steering res. Long story short, when the rig warmed up, the noise went away.
Here's a video. Do any of you have any ideas what this it?

will e · Post by **will e** » Sat Mar 28, 2015 7:40 am

I would start by removing the belt to the A.I.R. Pump.

You can get a cheap automotive stethoscope for $10 at the local parts store. Yeah, hose works well too but not as good as a stethoscope.

Lumpskie · Post by **Lumpskie** » Sat Mar 28, 2015 9:53 am

Hey will e:

I can't get the ticking to come back like you hear in the video BUT:
I think you're right. I don't have a stethoscope but I can feel the pump "pulsing" quite a bit. Are these things known to make a tapping/ticking noise when the go bad? (it looks like a rotary/vane pump not a piston style pump... why would a vane pump tick?)

Thanks for the help,

Cheap Hobby · Post by **Cheap Hobby** » Sat Mar 28, 2015 4:35 pm

They start making noise because there is no lube. It is a straight wear system they will seize when they feel like it.even when you are at speed. They run hot when new and get worse with age. We replace new ones under warranty and others that where 15 years old I had 1 on a 69 rambler and put on an 80 wagoner and it ran till the 80 was junked for body rot. They have a life and mind of their own.

letank · Post by **letank** » Sun Mar 29, 2015 3:01 am

A large or long screwdriver, the handle on you ear, walk the blade around on any metal part, WATCH out for moving parts...

FSJ Guy · Post by **FSJ Guy** » Sun Mar 29, 2015 2:01 pm

If the AIR pump is really the culprit, IIRC, you can still get replacement pumps, but you will have to reuse your existing pulley. There are 3 and 4 bolt versions.

Cheap Hobby · Post by **Cheap Hobby** » Mon Mar 30, 2015 1:16 am

You can also by pass the diverted valve And see if that stops the noise. The valves not working will cause heat build up and kill the pump lucky split as well

Lumpskie · Post by **Lumpskie** » Mon Mar 30, 2015 7:51 am

Thanks for the info, you guys. I still can't get it to make any noise. It made a racket that day and has been quiet ever since. From the look of it, I can get a replacement pump from my local O'Reilly Auto Parts, or from TeamGrandWagoneer as well. Is the diverter valve the assembly that sits behind the pump on the drivers side? (the thing you see about 5 seconds in to my video above)

Also, is there any lubrication or maintenance I can do on my current pump, or do I need to just buy a new one when the old one starts making noise?

letank · Post by **letank** » Tue Mar 31, 2015 2:42 am

hummm, one old post about diverter valve

http://www.ifsja.org/forums/vb/showthread.php?t=167802

the short version
somebody checked Rock Auto and searched for diverter valve, and looked at all the pictures until I saw one that looked the same as I saw in pictures of Grand Wagoneers. It's part number DV54, $109.

A little more searching and this seems to be a Ford part: Motorcraft CX-921
used on Fords from about '83-96, Rock Auto has a list of the applications if you click on the part number when viewing it.

It is lubricated for life... whatever the duration is...

Lumpskie · Post by **Lumpskie** » Thu Apr 02, 2015 6:26 am

Thanks for the link and information, Letank. I touched the diverter valve back when it was making noise. It seemed to be "pulsing" the worst of everything... maybe it had a temporary clog? Still waiting for the noise to come back....

JoeMan89 · Post by **JoeMan89** » Sat Apr 04, 2015 7:26 pm

The fuel pump will tick too if it's on it's way out.

Lumpskie · Post by **Lumpskie** » Fri Apr 17, 2015 11:01 am

Hey guys

If the smog pump is dying, would that lead to warm idle problems? The waggy died at a stop light today...

letank · Post by **letank** » Fri Apr 17, 2015 11:19 am

Lumpskie wrote:Hey guys

If the smog pump is dying, would that lead to warm idle problems? The waggy died at a stop light today...

What is your idle speed? at some point the pump may drag a bit , hence putting a brake on the rotating crankshaft... cut the belt is the quick solution if it starts to smoke.... pruners are handy....

Lumpskie · Post by **Lumpskie** » Fri Apr 17, 2015 3:22 pm

Idle speed seems a little low. I drove home (almost 100 miles) filled up the tank and haven't had it die again. But the idle still seems a little low. Just in case, I picked up a smog pump from O'Reilly. I think I'll just swap it out since it's been noisy on and off.

Lumpskie · Post by **Lumpskie** » Sat Apr 25, 2015 4:27 pm

I just wanted to update this thread with a resolution and to thank you guys. I replaced the smog pump today and the engine sounds good and the idle seems to be back to normal.

Thanks again for the troubleshooting help.

letank · Post by **letank** » Fri Mar 23, 2018 8:18 am

Funny, my turn, same thing happened yesterday, started the 74, and what a raucous ratcheting sound... Seemed like the PS pump... removing the AIR pump solved the problem... The engine is so quiet, if it was not for the cooling fan, I'd swear this is the electrical powered FSJ.
Doing a giggle search, it seems that some brands such as Bimmer and Toy are using electrical AIR pump

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