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94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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big dog
User
Feb 28, 2006, 7:21 AM
Post #1 of 12
(5475 views)
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94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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Hi
Hey, We have a 1994 Chevy Cheyenne 2500 6.5 Turbo Diesel V8 2WD, Extended Cab.
Just put in a new engine, but now not knowing if it has to do with it.
Nonetheless, there is a clicking sound. It Sounds like maybe a fan is hitting something a wire?
is what we are guessing. The sound is coming from the right front passenger side
Under the dash right side there is a big black plastic cover, covering some kind of motor, maybe fan motor?
not sure, but do you think it could be in that? I just took a peek its coming from that area.
Can you give me some ideas what and how to check around or in it or somewhere else? Or what it could be?
Please help.
Oh! the clicking happens when we first start the Truck and it evenually stops clicking.
And also starts clicking again when the Truck is turned off and evenually stops again.
Please try to be a bit detailed on what I can do, don't know to much. I'd appreciate it very much.
Please help! Give me some ides where and what to do and check.
Thanks.
big dog
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 28, 2006, 8:18 AM
Post #2 of 12
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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Unplug the fan motor - if problem stops that must be it. Replacements should be available with or without the squirrel cage and if that's it I'd get the one with that squirrel cage. This may or may not have anything to do with engine job. T
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big dog
User
Feb 28, 2006, 9:58 AM
Post #3 of 12
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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Hi Tom,
I will try that, but one question. Where is the location of the plug, to unplug it?
I really don't know. 
Please help, with detail if possible.
Thanks in the mean time I will be looking around. One thought would be easier for me
is maybe the fuse? I know where the fuses are but I know there maybe more than one part that uses the same fuse.
I'll take a look in the mean time.
Thanks again,
I really do appreciate all your help and your time.
By the way this is the wife of big dog, I enjoy looking while he tries to fix.
and like to help. So while he's I work, I like to try myself. 
big dog's wife, The B....
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 28, 2006, 4:37 PM
Post #4 of 12
(5467 views)
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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Pulling the fuse is a GREAT idea! The panel should, or owners manual should tell you which one. Best to only pull the right one. I own a 97 2500 Cheyenne (gas) but I bet it's the same and if you are having trouble hit back and I'll go look at mine and see what is where. Some fuse panels use #s and arrows to tell you which fuse but my truck uses abreviations. -- Like DRL (daytime running lights) and may say HTR like for heater) or something like that for the blower. You'll know you have the right one because the fan won't work at all. Good luck and let us all know how you make out.
Thousands of folks have hit on this site without making a post as they may have found their answer. T
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big dog
User
Mar 1, 2006, 9:14 AM
Post #5 of 12
(5457 views)
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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Hi!
Thanks for telling me about those abbreviations. I did see the plug, but waited til hubby came home.
He didn't want me to fool with the fuses, and there are lots of abbreviations. Can I ask, if I pull out the wrong plug will anything happen to the other accessories, like, not work anymore. My thought was that if anything, the fuse may just burn out. But that is easy to replace. I did tell him about the fuse, but he chose to pull out the motor
and it wasn't that.
He said he saw another motor, but small. He has no idea what it is.
and it would have been to hard to get to. The fan motor itself was a struggle for awhile.
Maybe I should have told you that the noise was coming from behind the fan motor, a part that is attached to the fan motor. We can put our hand behind fan motor, and behind the fan motor we can only feel the bottom
of it, which we can see and it's a plastic grid piece, we could poke our finger through it and touch the cover that lays on the grid which seems to be a flexible plastic piece. And that is where a fan like thing is hitting the bottom of that, cause we can push up that plastic when we poke our finger through the grid and it hits that fan and we are able to stop the noise cause it slows it down and stops it. But in no means correct the problem. Oh, we can hear a humming noise turns on.
So, It may be to hard to get to. He's very frustrated about it. Especially if he's going to have to get to it through where the fan motor is.
We were told that we have to turn the key (not start it) and wait until the glow plugs turn off and then start it.
So when we first just turn the key before starting it the clicking starts and stops 10 to 15 seconds later.
Could it have to do with the glow plugs? Some kind of motor for those plugs? That is my thought.
Should I try looking for the glow plug fuse and pull it out to see if that may be it? I won't ruin the glow plugs?
The glow plugs are expensive pieces, I believe there are 8. Cause we were going to replace them at one time.
So, what other thing may it be? And if I try pulling a fuse will it harm or malfunction anything?
Please any info. would be awesome.
Thanks again, I really do appreciate all your advice.
The B
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 1, 2006, 10:49 AM
Post #6 of 12
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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If you are worried about the fuse and do pull it - do so with engine off and put it back with fan off and engine still off. Some fuses cover more than one item but I think the blower is on its own.
I'm NOT a diesel tech but I don't think a glow plug can make a noise unless it was falling out. They just get red hot to get you started when cold to my knowledge. A spark plug will make a ticking noise but you don't have those.
I don't know how much computer controls the diesels have but I would do everything to avoid pulling fuses the are for things call EEC, ECM. That could reset some stuff but really shouldn't hurt anything.
You may have a piece of paper or something in the blower cage and it should change with blower speed if so. Keep us posted, T
Important: If you do take the blower out the nut that holds the squirrel cage may be and probably left hand thread -- that is clockwisekwise to loosen! If you break it you WILL need a new motor and won't get any core fee back.
(This post was edited by Tom Greenleaf on Mar 1, 2006, 11:07 AM)
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big dog
User
Mar 1, 2006, 2:41 PM
Post #7 of 12
(5452 views)
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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The blower cage? He took out something I'm sure he said the fan motor. he opened it and I saw the fan propellers and it was covered by a white plastic cover with holes (grids I can say) so when the fan spins it pushes air out.
Is that the blower cage? If it was it had nothing.
I guess I will try pulling some fuses myself except for the ones you mentioned. I have before pulled fuses to check them, and thanks for telling me to have everything off.
Thanks, will try again and keep you posted.
The B
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 1, 2006, 5:12 PM
Post #8 of 12
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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That "squirrel" cage I've mention is slang. It's the thing that the motor turns to move air. I hate to admit it but there probably IS a technical name for it that escapes me. I think near every vehicle made does this in the same fashion. I've never seen one that works like a table fan or the main fans common to the engine.
Funny about the words we use for things. Some funny ones and New England has a lot of words that parts stores just know and we natives all seem to use them.
__________________
Some funny examples are.....
Dash board? It really is an instrument panel.
Emergency brake? It really can be used that way but it's a parking brake.
** Now try Brittish English and a tire is a tyre, a trunk is the boot, and a hood is the bonnett, things like that go on forever and when using the web it gets confusing.
Be well, T
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big dog
User
Mar 15, 2006, 8:22 AM
Post #9 of 12
(5357 views)
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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Hi Tom Greenleaf
I want to thank you for your help. Though we never fixed it, we knew it had to do with either the heater or the a/c. I pulled the fuse that said HTR - A/C. That stopped the noise. A/C has a blown hose. Anyway. We sold the car and told the new seller about the problem with A/C and the noise.
All is good.
Thanks again for all your help.
The B
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Ezmojo
New User
Oct 10, 2006, 5:16 PM
Post #10 of 12
(4812 views)
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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I have the same problem. I am having difficulty taking the blower out to see what is tapping. Do I need to take the dash out? Any help would be helpful and thanks. Could it be a door hitting the fan?
TIA
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 11, 2006, 3:48 AM
Post #11 of 12
(4809 views)
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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I own a similar C/K 2500 but a '97. I'll take a look but I can already say that I doubt blower can hit a diverter door and that you don't have to take the dash out until I go take a look.
Others here know exactly? - I don't without looking, T
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Ezmojo
New User
Oct 15, 2006, 4:52 PM
Post #12 of 12
(4802 views)
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Re: 94 chevy cheyenne 2500 6.5 turbo diesel making cllicking sound in cab passenger side
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Thanks for looking, I`m sure the fanis not hitting the panel. The panel sits on top of a grid parael to the floor. You can take your finger and push up on it and will open and divert air out of the grid. Something is hitting this plastic pad/cover, realty beats me to what it is. Like stated before it will start/stop after key is on or off.
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