9 1 9 1 4

Follow TrueDelta

TrueDelta at Facebook TrueDelta at Google+ TrueDelta at Twitter

2008 Pontiac G8 Engine Problems and Repair Histories

62 TrueDelta members own a 2008 Pontiac G8. 16 of these members (25.8%) have reported engine repairs for their car. A total of 18 engine repairs to 2008 Pontiac G8s--an average of 0.3 per vehicle--have been reported.

See our lemon odds and nada odds page for more details. To see how frequently 2008 Pontiac G8 problems occur, check out our car reliability stats.

Want to read about specific problems behind these stats? Jump to the 2008 Pontiac G8 problem descriptions below.

Don't infer 2008 Pontiac G8 problem frequency from what you see on this page. Many lucky owners have had no repairs, and their cars are not shown.

Percentage of 2008 Pontiac G8 repairs by problem area

24% of the 2008 Pontiac G8 repairs were to the engine, 1% to the transmission, 7% to the brakes, 31% to the suspension, 22% to the electrical or air-conditioning systems, 8% to the body and trim, and 7% to other areas of the vehicle.

Chart based on 74 repairs.
Non-members can see only ten 2008 Pontiac G8 Engine problems and repair histories. Log in or join us to see them all.
Repair costs are in local units.

2008 Pontiac G8 4dr Sedan

361-horsepower 6.0L V8 6-speed shiftable automatic RWD

Pontiac G8 in Texas, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Nov 2009 22000    
47000 0 Pulled a P0445 and P0449 code. Replaced gas cap for P0455 and replaced EVAP canister/solenoid for P0449. No issues since. 
 
Pontiac G8 in Michigan, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Mar 2011 21000    
27000 60 Gasket for the axle back system failed causing a severe leak and carbon monoxide(exhaust fumes) could be smelled heavily inside the car when stopped ie warming up, stop light, idling while parked. 
59000 3500 Catastrophic valve train failure 
Pontiac G8 in South Dakota, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Apr 2008 0    
4000 0 Hesitation when taking off...fixed with transmission computer flash update. 
 
Pontiac G8 in New York, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2009 7000    
10000 0 Evap leak indicated, check engine light cleared, has not come back in 4 weeks. 
11000 0 replaced fuel cap due to EVAP leak 
14000 0 looses antifreeze every 6 months or so, second time needed to refill, no leak found. 
30000  
Pontiac G8 in Michigan, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Oct 2008 0    
6000 0 Engine replaced due to piston slap. 
 
Pontiac G8 in Illinois, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Mar 2008 0    
16000 0 Defective valve spring replaced. Sounded horrible, like it was having a really hard time running, as if not getting enough air. Even died on me several times (during my troubleshooting, I wasn't driving it after the initial "Check Engine" light came on). Defective valve spring replaced again the next day while visiting family, so second dealer. First dealer had left piece of plastic, approximately 2 in x 1/2 in, underneath the valve spring, causing it to bend and therefore malfunction. 
18500 0 Valve spring broke, also causing the #7 intake runner to have a leak. Everything was fixed under warranty. 
64000  
Pontiac G8 in Ohio, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Jul 2008 0    
8000 0 Engine oil leak. 
 

Return to top

2008 Pontiac G8 4dr Sedan

256-horsepower 3.6L V6 5-speed shiftable automatic RWD

Pontiac G8 in Michigan, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2009 18000    
73000 0 Service engine soon came on for emission issue. This was due to a faulty gas cap. This was previously replaced, but found the replacement was the INCORRECT gas cap! Dealer also cleared the service engine code. 
123000  
Pontiac G8 in Texas, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Sep 2010 36000    
47000 88 Engine light went on. Was able to quickly fix the gas cap problem. 
49000  
Pontiac G8 in Michigan, United States
Date Odometer
(in miles)
Cost Problem/Repair Description
Nov 2010 56000    
57000 0 CEL, stretched timing chain. TC replaced by dealer.  
 

Return to top