Here is the short. 1990 300zx NA MT and a friend and I just accomplished a 120K timing belt change (parts ordered from Z1). We spent most of the summer in our free time working away at this task and finally tackled the job using some pretty useful resources online.
The end result of many hours is a disappointment. I didn't hook up any of the accessory belts or install the radiator so I can see how it runs first in case I need to take it all apart again. Did not run the engine past 2.5 min. It runs rough and obviously backfires (drivers side). Scary ping noise happens at the 20 second mark after starting the car. There is smoke rising from the drivers side which smells like exhaust. I set the engine to TDC and marked the old belt before installing the new. The marks on the both intake and exhaust cam gears lines up exactly on the factory marks on the belt. One thing that has been burning my mind is the crank gear, I didn't mark it, but had the car in fifth gear the whole time. Could it have moved? I ask myself that question but cannot be 100% sure. I need some expert advise! Right now I am fearing the worst and hope I didn't cause irreversible damage. I am prepared to take what I gather here and apply it during labor day. I am not very experienced but have tackled projects on my 280zx, '97 Pathfinder and Nissan Quest over the years.
and installed bypass kit.
-Coolant line bypass
-Replaced all vacuum lines with silicone
-Replaced all fuel lines
-New lower harness
-All new gaskets everywhere (except head gasket)
Here is the video with sound.
I have always been around this forum through the years since I had a 280zx. I have mostly just lurked and read a lot. I obtained my 300zx in 2006 from a friend. It had 212k miles and it was in sad shape. Since I obtained the car for a decent price, I decided to work on it myself. If I had the choice again, I would of just purchased another Z like many people have said on the forum. I had a third party rebuild the engine (low compression in 2 of the cylinders) and transmission. I also had them install a new clutch, new injectors, new upper, main wiring harness. Much work was done but the car had a pretty bad oil leak (Cam seals as they were not changed by them) and it didn't pass emissions due to a lower intake gasket leak. I regret going through with having the third party work on it. I also need to change the drive shaft and passenger side tie rod as it ruined my new tires I purchased in 2006 due to heavy inner toe wear. I would turn the car once every 6 months to at least keep the car running occasionally. Every year that passed, I would tell myself I am going to fix the car, or many a time I told myself I would let it go, but thanks to my friend, he encouraged me to fix it and with his help I am where I am now. I love the car, and have enjoyed working on this project. It is difficult as I have 4 kids and a wife so it has been cost and time prohibitive but that is expected with a Z32.
Thanks for listening.