05 Heat Riser?
Thread Starter
Racer
Joined: Jun 2008
Posts: 276
Likes: 0
From: SF Bay Area
05 Heat Riser?
I happen to be looking at a 05 C6 coupe with 20K miles and when I test drove it, he explained the ticking sound was coming from the heat riser and said that there was a TSB on it. The sound was there at idle and never went away. He assured me that the problem would be taken care of by a Chevy dealership. When I did a search I couldn't find a TSB on the heat riser, my concern is, could there be a temporary fix for the ticking sound? I wouldn't want this to reappear after I take ownership. My research came up with possible pushrod problem although it's OK on the "crank pulley bolt" by the vin number.
Can the ticking be caused by the heat riser or other minor issues? Should I be concerned about any other issues specific to 05? BTW, I've read about the TSB on the colored tops. Last question, since I'm looking for an auto is it worth to move up to an 06 for the paddle shifters? I know the 08 (would be the way to go) have the down shifting rev matching as on my G35 which is really nice although it's not doable for me at this time.
Thanks for any help.
Mark
Can the ticking be caused by the heat riser or other minor issues? Should I be concerned about any other issues specific to 05? BTW, I've read about the TSB on the colored tops. Last question, since I'm looking for an auto is it worth to move up to an 06 for the paddle shifters? I know the 08 (would be the way to go) have the down shifting rev matching as on my G35 which is really nice although it's not doable for me at this time.
Thanks for any help.
Mark
Melting Slicks
Joined: Sep 2005
Posts: 2,670
Likes: 134
From: merritt island fl
C1 of Year Finalist (stock) 2019
2016 C1 of the Year Finalist
2015 C2 of the Year Finalist
I don't think the LS engines have a heat riser- at least not on the exhaust manifold like older design engines have.
Race Director
Joined: Jan 2006
Posts: 18,396
Likes: 169
The LS family of engines are noisey. Take off the coil pack covers (they're designed to acoustically dampen the valvetrain noise) and it really gets noisey. The intake manifold also dampens some noise, as it's plastic. What you are hearing may be the usual ticking associated with the valvetrain. Then again, it may not. If the car is still under warrenty, then you're covered. If the car is out of warrenty, I suggest taking it to a dealer and pay for a diagonises before buying it. Good luck.
Retired & lovin' it!
Joined: Mar 2005
Posts: 4,472
Likes: 546
From: Jackson NJ
I've got an '05 & standing outside the car, I can hear a "ticking" that's valve train noise.....but cannot be heard inside the car or once on the road. If what you're hearing is louder than that, needs to be checked out before you make a purchase.
Safety Car
Joined: Aug 2000
Posts: 3,734
Likes: 2
From: Southeastern PA
Take a look at the VIN. There is an issue with early 05's regarding the crank pulley and the bolt that holds it to the engine. Do a search. Good luck!
Here's a link from the FAQ. http://forums.corvetteforum.com/show...47&forum_id=74
Here's a link from the FAQ. http://forums.corvetteforum.com/show...47&forum_id=74
Last edited by 70454; Jul 9, 2008 at 10:40 AM.
Instructor
Joined: Nov 2006
Posts: 221
Likes: 0
Also check the torque on the Exhaust Manifold bolts... (manifold to head retaining bolts)
On my lo-mileage 05 I noticed this (inside) esp. around 1800-2K rpms - checked/retorqued
the manifold bolts and some were about 1/4 turn or so off spec (I think spec was 21ft/lbs but don't quote me on that)
- solved the problem. (BTW - there was no visible evidence of an exhaust leak)
Of course there's going to be some valvetrain (and sometimes injector I think) noise in these engines but torquing the manifold bolts solved the inside the car noise I was hearing.
On my lo-mileage 05 I noticed this (inside) esp. around 1800-2K rpms - checked/retorqued
the manifold bolts and some were about 1/4 turn or so off spec (I think spec was 21ft/lbs but don't quote me on that)
- solved the problem. (BTW - there was no visible evidence of an exhaust leak)
Of course there's going to be some valvetrain (and sometimes injector I think) noise in these engines but torquing the manifold bolts solved the inside the car noise I was hearing.
Last edited by Xlr8yourC5; Jul 9, 2008 at 03:50 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
Thread Starter
Racer
Joined: Jun 2008
Posts: 276
Likes: 0
From: SF Bay Area
Thanks for all the advice. I'll definitely have it checked before I make my final decision. I kinda focused on this one because it had every option I was looking, had the color, in addition he added the Baer rotors, painted calibers, ipod hookup, 08 C6 wheels, Borla Stinger exhaust, Billet grille, and it was in my price range.
"I felt the extra 2 gears in the 2006 up Auto was worth the wait".
Anyone else feel the same way that if you're going to buy an automatic an 06 or later is a must, not only for the 2 extra gears but for also for the paddle shifters? I can add the extra stuff but it's not realistic to change the transmission.
Thanks for all those that responded, it helps me in making the right decision.
Mark
"I felt the extra 2 gears in the 2006 up Auto was worth the wait".
Anyone else feel the same way that if you're going to buy an automatic an 06 or later is a must, not only for the 2 extra gears but for also for the paddle shifters? I can add the extra stuff but it's not realistic to change the transmission.
Thanks for all those that responded, it helps me in making the right decision.
Mark