GM Quad4 (2.3L DOHC I4) :How durable is it?

On Tuesday, December 1, 1998 2:00:00 AM UTC-6, Oriana Y. Reyes wrote:
> Greetings everyone;
> I was wondering if anyone had any experiences with this engine. Mine is
> the High Output variety (180 HP) that came stock in my 94 Olds Achieva SC..
> It now has 108K miles on it, and I'm curious how much longer it will last..
> Specifically, I am beginning to worry about the valvetrain and cam chains.. I
> had an 86 Olds 98 Regency which had the old 3.8L V6 in it, and it lost the
> timing chain at around 150K, which I understand is pretty average. The Quad4
> uses dual chains (at least in the 94 model) to drive the cams, so this might
> improve the reliability. All the same, I'd like to know if anyone has had
> any major problems with their Quad4 motor. I'm keeping my fingers crossed..
> Also, if any of the more technical people here would like to crush my
> pipe dreams : I was wondering about the feasability of bolting on an Eaton
> Roots type supercharger to said Quad4. Yes, I have a 2,400 lb car being
> moved by 180 horses, and that's still not enough. I've seen prototype
> Sunfires and Cavaliers with this supercharger mated to the 2.4L TwinCam
> motor, which is a close cousin and descendant from the Quad4. Seems to me if
> that setup works, then it ought to work with my engine.
>
> Thanks for any input!
> - Ben
>
>

Don't bother. I am a mechanic and have seen more problems with these motors than I care to. Seriously. Don't try to add anything to this motor. If you have made it to 100k without a headgasket, count yourself lucky and get rid of it before you run into that. The 2.4 twin cam was also a different design head and block. Your best bet, don't waste any money on upgrades to a vehicle that has a known problem with heads and headgaskets.

wrote:
> On Tuesday, December 1, 1998 2:00:00 AM UTC-6, Oriana Y. Reyes wrote:
>> Greetings everyone;
>>
>> Thanks for any input!
>> - Ben
>>
>>
>
> Don't bother. I am a mechanic and have seen more problems with these motors than I care to. Seriously. Don't try to add anything to this motor. If you have made it to 100k without a headgasket, count yourself lucky and get rid of it before you run into that. The 2.4 twin cam was also a different design head and block. Your best bet, don't waste any money on upgrades to a vehicle that has a known problem with heads and headgaskets.

That was posted 16 years ago.
Why do you answer now?