1991 cutlass international coupe-x-code 3.4 DOHC-25k original miles preservation

[claudio Ruesta]

Greetings form Peru justa wan to  share my new preservation project with the community. it's a legitimate 1991 OLSDMOBILE CUTLASS SUPREME INTERNATIONAL SERIES COUPE ( X-Code 3.4L DOHC TWIN Dual Cam) with only 25,857 original miles 

 

Here is a crazy part of its history: Someone in the past installed a 3rd-generation LPG system on it, which caused it to stop running back in the day. Because of that mistake, the car was left sitting for decades, sleeping like a time capsule! A blessing in disguise for me.

Everything from the LPG system has been removed from the engine bay, except for the 16-gallon tank in the trunk and the exterior filler valve, which I will remove and patch later.

The great news is that the engine is finally up and running again, and it sounds great! The interior is full Burgundy leather with the premium AQ9 bucket seats, and the green digital cluster works perfectly.

Right now, I'm doing a complete brake overhaul (the front calipers were seized) and getting ready for a full fluid flush. New water pump and mechanical thermostat are going in next.

My approach is mechanics first: make it move, shift, and brake safely, then deal with the bodywork. Glad to be here, and I'd love to hear your thoughts, technical tips, and recommendations for bringing this 90s unicorn back to life!

[jiggity76]

Holy Hell...how did I miss this!!!!

This is pretty incredible and so glad I finally found this thread.  I am here for any help.

[GnatGoSplat]

That's awesome, I often wish my Cutlass could end up somewhere exotic and I could live vicariously through it. 

[55trucker]

It's dusty........but not rusty. Nice climate in Peru.

[claudio Ruesta]

On 8/8/2026 at 4:02 PM, jiggity76 said:

Holy Hell...how did I miss this!!!!

This is pretty incredible and so glad I finally found this thread.  I am here for any help.

do you know were i can found the timing belt tensioner  for this car the motor is 3.4 lq1   am changing the timing belt but mine is crying oil i need a new on   the part number is GM 24503860