Originally Posted by Erik
Circa 7 years ago some GM (Pontiac Bonneville V-6) and Ford (Mustang GT V-8) engines had issues with coolant leaks from the coolant ports of their plastic intake manifolds (the plastic would flex and leak coolant into the engine or externally. The GM mechanic admitted that the OEM intakes were only good for about 70K miles (My dad replaced it twice after it leaked in the same spot both times at about 70K miles each time).
this problem w/ the GM V6s most certainly cost them dearly in reliability rating. i believe w/out that issue, they would be on par w/ toyota and honda. i've had several and they are absolutely fantastic except for the intake issue.
if only they made their entire line of vehicles this way they might not ever have needed a bailout...