Terrible engine noise, please help!
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 19
Likes: 0
Terrible engine noise, please help!
Hoping this is something small but sounds bad. Checked oil and it was a little low but not out—added a bit more but didn’t help. Kinda sounds like it’s coming more from those front belts than from the engine itself but hard to say.
Thoughts? Any help is appreciated.
Thoughts? Any help is appreciated.
Race Director
Joined: May 2006
Posts: 18,695
Likes: 2,572
1. Is the fan hitting anything?
2. Take a length of rubber hose hold one end to your ear and hold the other end against the alternator, the power steering pump, etc. to determine where the noise is coming from.
2. Take a length of rubber hose hold one end to your ear and hold the other end against the alternator, the power steering pump, etc. to determine where the noise is coming from.
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 19
Likes: 0
Ya I can’t even get it started now so I wonder if something is stuck. Tried for a minute and got a chemical smell from the car when I tried. I tried moving the radiator fan by hand but can barely get any movement one way or another—is that expected when car is off? Belts appear to maybe be a little forward of true but hard to say.
Le Mans Master
Joined: Aug 2005
Posts: 6,526
Likes: 1,960
From: Temple Terrace Florida
Noise
Start by taking the front belt off and running the engine. If the noise persists, take the second belt off. If you still hear the noise, the problem is within the engine. Jerry
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 19
Likes: 0
Thanks so much! Did some research on clutch fans generally but it wasn't obvious to me...if everything is fine with the clutch fan, should it spin freely or NOT spin freely when the car is off?
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 19
Likes: 0
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
I can't run the video today for some reason. But if fan is really stiff, must be shot like BigBird said. There is fluid inside them things. The fan clutch. Not BigBird.
Last edited by HeadsU.P.; Apr 19, 2018 at 03:31 PM.
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 19
Likes: 0
weird, maybe try now? Just readded link. Video hopefully will make it obvious to someone who knows what the heck is up lol
Last edited by panamaniac; Apr 18, 2018 at 03:37 PM.
Race Director
Joined: May 2006
Posts: 18,695
Likes: 2,572
either the clutch is seized or you dont have a clutch. Need a better look at the fan and what it is mounted to in your next video. Can you get the camera in front of the fan to see the center hub?
Last edited by MelWff; Apr 18, 2018 at 03:48 PM.
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 19
Likes: 0
No clutch
Oh, sorry I didn’t think to say earlier—this is an automatic, so no user-operated clutch. I assume that makes a difference?
edit: very sorry to have missed this, sorry gang.
edit: very sorry to have missed this, sorry gang.
Last edited by panamaniac; Apr 18, 2018 at 04:05 PM. Reason: Edited to make it clear I was sorry
Team Owner
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
this alone is not noisy.
the problem would be it is wobbling allowing fan tips to hit
shroud.
the noise does sound like a fan to shroud issue BUT
that doesn't mean it is.
earlier poster told you to remove fan belts to see
which accessory is making noise.
do some work
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 19
Likes: 0
the fan clutch may or may not lock up when hot.
this alone is not noisy.
the problem would be it is wobbling allowing fan tips to hit
shroud.
the noise does sound like a fan to shroud issue BUT
that doesn't mean it is.
earlier poster told you to remove fan belts to see
which accessory is making noise.
do some work
this alone is not noisy.
the problem would be it is wobbling allowing fan tips to hit
shroud.
the noise does sound like a fan to shroud issue BUT
that doesn't mean it is.
earlier poster told you to remove fan belts to see
which accessory is making noise.
do some work
