This is a short continuation of https://montecarloforum.com/forum/pa...xterior-61779/ . It started with restoration, aaaaand turned into having to fix things.

My Monte's VERY sick.
We installed a new ignition switch, only to have it instantly die on us when we started it. Whether it's jumped time, or has somehow been running horribly out of time the entire time I've owned it, the result is the same. The rear bank of cylinders is completely reversed in terms of intake and exhaust, and the front is slightly out in the same manner. There is also an obscene amount of carbon buildup in the intake, presumably from this reversed intake/exhaust stroke issue. The accessory belt also had a nasty squeak. Come to find out, the idler pulley for the serpentine went bad.
So, here we are. My Dad just ordered a set of LQ1 specific timing tools, so we will start as soon as they get here on the following list;

1. Clean everything up. (Might as well, since it has to come down to the lower intake + heads anyway. Taking the lower off at this point will be pretty easy, and it'll be easy to clean, especially since we have a parts cleaner.)
2. Rebuild and clean the injectors. (also a might as well thing. The O-rings are probably factory, the filters the same).
3. Retime the motor and torque everything down. (we aren't going to tune it juuuust yet, we'll just line it up to TDC for now to see how it runs)
4. Since we're retiming anyway, replace the timing belt and tensioner pulleys.
5. Replacing the lower intake gaskets (one of the reasons I'm taking it off, since it technically doesn't have to in order to do a timing belt. The only things that have to come off are the plenum + associated fastenings/accessories, and the valve covers).
6. Replacing the plenum and valve cover gaskets (since they have to come off).
7. Replacing the Thermostat & Thermostat housing fitting (thermostat is might as well, and the housing is leaking pretty hard. It appears to be ready to go, and it's cheap, so it's getting done.
8. Replacing spark plugs/wires (We haven't done it while in my possession, so we don't know how old these are- they're not the correct plug tho, they're iridium. Engine is rated for copper/platinum).
9. Oil change (good practice).
10. Stick they key in it, say a prayer, and attempt to start her up.


I'll be crossing these out and adding pictures as I perform these tasks.

 

The new plug wires came in! These are the closest I could find to the OEM style, which were chevy red in color. These'll get crossed out on the list when I install them.

 

Update and request for help!
We've gotten it ready to time, but we have an issue. The cam sprockets are seized to the cams. We got the bolts loose, but we can't free the sprockets... Which is pretty bad, considering they need to freely spin to properly time this motor. Does anyone know a way other than using a dead blow to wack them out to free these up? I don't wanna damage these since they're pretty much unobtanium.

 

I dunno squat about the 3.4 dohc, but isnt a puller the right tool for this job? Not sure what type would work, but I'd imagine there has to be some kind of puller made for cam sprockets.

 

Sorry for the VERY long response time, but there IS a puller for it in the kit... The only problem is that it is made for the earlier "Peanut" style of sprocket, so it won't work for my motor. The way it got freed up eventually was by my Dad carefully using an air-chisel on the bushings to get them to pop out enough for the cam sprockets to at least rotate compared to the rest of the cam.