Water Pump ?? 02 Z06
Thread Starter
Pro
Joined: Feb 2009
Posts: 587
Likes: 0
From: Columbus Ohio
Water Pump ?? 02 Z06
Ive been hearing an intermittent noise on the front of the engine, sort of a squeal and tic combined with a whirring noise. The last time I drove the car it was faint, then went away completely. Today I started it up everything was fine for about 10 seconds then it really came back with a vengance and now it is loud ... really loud. I even noticed that when the noise began it pulled the idle speed down momentarily and almost stalled the engine. All gauges read normal. No fluids leaking, checked the weep hole at the water pump, its dry. I planned to replace both belts anyway, so just to try and isolate the problem I cut the A/C belt and the noise is still there. I will loosen the main belt tomorrow and see if that silences it. I dont think the tensioner or idler pulley look too hard to replace but if it turns out to be the water pump, does anyone have a link to a write-up on water pump replacement ?
Thanks
B
Thanks
B
Last edited by blazer427X3; Mar 5, 2010 at 12:09 AM.
Thread Starter
Pro
Joined: Feb 2009
Posts: 587
Likes: 0
From: Columbus Ohio
Found this which tells me how to do the job, thought I would post it up just in case someone else runs into the same thing.
http://www.ls1howto.com/index.php?article=27
I am wating for my morning coffee to kick in then its out to the garage to slip the main belt off and see if the noise is still there. I am taking the day off from work to get this sorted out
. Has anyone ever had a water pump act up (make noise) without anything coming out of the weep hole and not overheating ?
http://www.ls1howto.com/index.php?article=27
I am wating for my morning coffee to kick in then its out to the garage to slip the main belt off and see if the noise is still there. I am taking the day off from work to get this sorted out
. Has anyone ever had a water pump act up (make noise) without anything coming out of the weep hole and not overheating ?
Last edited by blazer427X3; Mar 5, 2010 at 08:34 AM.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Found this which tells me how to do the job, thought I would post it up just in case someone else runs into the same thing.
http://www.ls1howto.com/index.php?article=27
I am wating for my morning coffee to kick in then its out to the garage to slip the main belt off and see if the noise is still there. I am taking the day off from work to get this sorted out . Has anyone ever had a water pump act up (make noise) without anything coming out of the weep hole and not overheating ?
http://www.ls1howto.com/index.php?article=27
I am wating for my morning coffee to kick in then its out to the garage to slip the main belt off and see if the noise is still there. I am taking the day off from work to get this sorted out
. Has anyone ever had a water pump act up (make noise) without anything coming out of the weep hole and not overheating ?After taking the main belt off, check for looseness or slop in all of the tensioner and idler pulleys.
Thread Starter
Pro
Joined: Feb 2009
Posts: 587
Likes: 0
From: Columbus Ohio
Thanks LoneStar. The idler pulley is cheap, tensioner isnt too expensive either, even if it turns out to be the water pump I think I will replace them along with putting on a new Gatorback belt so I don't have to worry about anything in the area.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Nice thing about the main tensioner is that you can easily change just the pulley. I think I used a Gates 38006 on mine IIRC. Much less expensive. Since the others (A/C tensioner and both idlers) are harder to get to, changing out the whole assembly on them makes more sense. I agree on the Gatorbacks too. Best choice.
Thread Starter
Pro
Joined: Feb 2009
Posts: 587
Likes: 0
From: Columbus Ohio
Took the belt off ... the whirring noise went away but tick is still present. Pulled valve covers, no broken springs evident on visual inspection, rockers looked to move normally when I bump the engine. Starting to look like this is an internal problem. Compression test next, what should normal compression be ? Without a belt the tick sounds a lot like it could be a lifter but I cant isolate which side its on, almost like its coming from under the intake manifold. I will take a closer look at the rockers and check for a bent push rod first. 
I will shoot a short video and post it to get some opinions on the noise. No overrev ... at least not recently and I think its interesting that the tick went away and then came back. The tick just started the other day when I started it up. I should probably post anything further about this under a new thread entitled NOT the water pump.
I will shoot a short video and post it to get some opinions on the noise. No overrev ... at least not recently and I think its interesting that the tick went away and then came back. The tick just started the other day when I started it up. I should probably post anything further about this under a new thread entitled NOT the water pump.
Last edited by blazer427X3; Mar 5, 2010 at 09:52 AM.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Took the belt off ... the whirring noise went away but tick is still present. Pulled valve covers, no broken springs evident on visual inspection, rockers looked to move normally when I bump the engine. Starting to look like this is an internal problem. Compression test next, what should normal compression be ? Without a belt the tick sounds a lot like it could be a lifter but I cant isolate which side its on, almost like its coming from under the intake manifold. I will take a closer look at the rockers and check for a bent push rod first. I will shoot a short video and post it to get some opinions on the noise. No overrev ... at least not recently and I think its interesting that the tick went away and then came back. The tick just started the other day when I started it up. I should probably post anything further about this under a new thread entitled NOT the water pump.
I will shoot a short video and post it to get some opinions on the noise. No overrev ... at least not recently and I think its interesting that the tick went away and then came back. The tick just started the other day when I started it up. I should probably post anything further about this under a new thread entitled NOT the water pump. 
Racer
Joined: Feb 2004
Posts: 348
Likes: 6
From: Las vegas Nevada
Water Pump
I replaced my water pump last month. I also heard that ticking noise and found some coolent on my garage floor. Easy job, must take your time. The bolt that is furthest on the pump (drivers side) will not come completly off bercause of the ABS brake assy. Pull the pump off with the bolt with it. Good idea to do is manufacture some giude pins that side into the bolt holes on the block, this will help in installing the pump. Found it to be helpfull when aligning the pimp with the gaskets onto the block. Check on some more write up. I found lots of data on this site. People her are good at listed what they have done.
Steve
Steve
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Tech Contributor
Joined: Jan 2007
Posts: 19,421
Likes: 1,146
From: Dyer, IN
Took the belt off ... the whirring noise went away but tick is still present. Pulled valve covers, no broken springs evident on visual inspection, rockers looked to move normally when I bump the engine. Starting to look like this is an internal problem. Compression test next, what should normal compression be ? Without a belt the tick sounds a lot like it could be a lifter but I cant isolate which side its on, almost like its coming from under the intake manifold. I will take a closer look at the rockers and check for a bent push rod first. I will shoot a short video and post it to get some opinions on the noise. No overrev ... at least not recently and I think its interesting that the tick went away and then came back. The tick just started the other day when I started it up. I should probably post anything further about this under a new thread entitled NOT the water pump.
I will shoot a short video and post it to get some opinions on the noise. No overrev ... at least not recently and I think its interesting that the tick went away and then came back. The tick just started the other day when I started it up. I should probably post anything further about this under a new thread entitled NOT the water pump.
Thread Starter
Pro
Joined: Feb 2009
Posts: 587
Likes: 0
From: Columbus Ohio
Thanks for the input guys, its really appreciated. I am pretty sure I have an internal issue and will post again in this section later this evening after I get a little more info and can more clearly illustrate the issue and list the circumstances which occurred up to this point.
Again ... Thank You.
B
Again ... Thank You.
B
