C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Diagnose Tick

Thread Tools
 
Search this Thread
 
Old Aug 31, 2009 | 10:02 PM
  #1  
jimmers's Avatar
jimmers
Thread Starter
Safety Car
15 Year Member
 
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Default Diagnose Tick

I have developed an engine tick that speeds up with rpm's. I originally thought it was my injectors, but now im second guessing myself.

I unplugged the two injectors that I thought were ticking, but the noise never went away. Now I assumed it was these two injectors because the pulse on them is way stronger then the others when touched. Any idea why the pulse is stronger on these two? Are they bad?

Now i'm thinking it might be the lifters. The tick is coming from the back of the engine on the drivers side. If I touch the valve covers I don't feel anything. I'm going to take the covers and take a look. Should everything be tight? Any sort of wiggle?

The engine was rebuilt 2 years ago. This was the first year that 5w30 oil has been used. For the break in I used 10w30. Could this be an issue? Should I still be using 10w30? There is about 3000km on the engine.

The car runs very strong, with no codes. The ticking is present right when the car is started and once it's warm. It never goes away. Any thoughts or ideas? Thanks!
Reply
Old Sep 1, 2009 | 09:22 AM
  #2  
Red 91's Avatar
Red 91
Racer
10 Year Member
 
Joined: May 2008
Posts: 312
Likes: 19
Default

Check to make sure it is not an exhaust leak at the manifold
Reply
Old Sep 1, 2009 | 11:57 AM
  #3  
Paul Ruggeri's Avatar
0Paul Ruggeri
Former Vendor
 
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
Default

Buy yourself a mechanics stethoscope.
Reply
Old Sep 1, 2009 | 11:20 PM
  #4  
jimmers's Avatar
jimmers
Thread Starter
Safety Car
15 Year Member
 
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Default

Originally Posted by Red 91
Check to make sure it is not an exhaust leak at the manifold
How can I determine this?
Reply
Old Sep 1, 2009 | 11:26 PM
  #5  
jimmers's Avatar
jimmers
Thread Starter
Safety Car
15 Year Member
 
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Default

Originally Posted by Paul Ruggeri
Buy yourself a mechanics stethoscope.
I used a screwdriver and started listening in different areas, but could not find the sound. I've never done this before, but I take it when using a screwdriver or stethoscpe the sound will really jump out?

The sound seems louder under the driver sides dash.

Would an exhaust leak make a ticking sound that followed rpm? Maybe that could explain the rich smell?
Reply
Old Sep 2, 2009 | 10:31 AM
  #6  
Aardwolf's Avatar
Aardwolf
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2004
Posts: 13,949
Likes: 705
From: WI
Default

Mine had a tick when I bought it and I never could find the source. Till I changed out the heads, there was a washer stuck in the valve.

Look for carbon tracing to find an exhaust leak.
Reply
Old Sep 2, 2009 | 11:11 AM
  #7  
Paul Ruggeri's Avatar
0Paul Ruggeri
Former Vendor
 
Joined: Nov 2006
Posts: 2,482
Likes: 3
From: Carmichael ca
Default

Usually an exhaust leak will get quieter as the engine warms up.
Reply
Old Sep 2, 2009 | 11:18 AM
  #8  
jmgtp's Avatar
jmgtp
Drifting
15 Year Member
Photogenic
Liked
Loved
 
Joined: Aug 2009
Posts: 1,971
Likes: 243
Default

Loose rocker arm maybe?...

http://forums.corvetteforum.com/c4-t...e-running.html
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-1

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-2

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Sep 2, 2009 | 09:29 PM
  #9  
jimmers's Avatar
jimmers
Thread Starter
Safety Car
15 Year Member
 
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Default

Well it turns out I had a loose header bolt. I tightened it up and the tick went away. I checked the other bolts and some were a bit loose. Does anyone have any tips on tightening the bolt closest to the passenger?
Thanks to everyone for their help!
Reply
Old Sep 2, 2009 | 10:38 PM
  #10  
Midnight 85's Avatar
Midnight 85
Le Mans Master
15 Year Member
 
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Default

That last one is easier to get to from the bottom.
Reply
Old Sep 3, 2009 | 08:36 AM
  #11  
jimmers's Avatar
jimmers
Thread Starter
Safety Car
15 Year Member
 
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Default

Originally Posted by Midnight 85
That last one is easier to get to from the bottom.
I tried but I can't get a wrench or socket on it. I'll give it another go!
Reply
Old Sep 3, 2009 | 08:46 AM
  #12  
Red 91's Avatar
Red 91
Racer
10 Year Member
 
Joined: May 2008
Posts: 312
Likes: 19
Default

Possibly a 12 point wrench, or bend a wrench with a torch to fit.
Reply
Old Sep 3, 2009 | 09:52 AM
  #13  
Midnight 85's Avatar
Midnight 85
Le Mans Master
15 Year Member
 
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
Default

Originally Posted by jimmers
I tried but I can't get a wrench or socket on it. I'll give it another go!
Try a 1 inch allen bolt, the allen wrench might work better for you. I have Hedmans and that area is wide open on the bottom but yours may be different.
Reply
Old Sep 3, 2009 | 05:18 PM
  #14  
jimmers's Avatar
jimmers
Thread Starter
Safety Car
15 Year Member
 
Joined: Mar 2005
Posts: 4,723
Likes: 11
From: Winnipeg Manitoba, Canada
Default

Originally Posted by Midnight 85
Try a 1 inch allen bolt, the allen wrench might work better for you. I have Hedmans and that area is wide open on the bottom but yours may be different.
I've got Hooker headers and i can barely fit my hand in there. Thanks for the tip, I'll give it a try.
Reply

Get notified of new replies

To Diagnose Tick





All times are GMT -4. The time now is 04:55 PM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-2
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE