Hi! new member to the forums. I've had a number of Blazers in the day. Black ZR2, pewter ZR2 5 speed with sunroof, and I now have a red ZR2 with 200K on it. I've had the current ZR2 since 2015 - going on 9 years now. Just finished a 200K service, oil pump, timing chain, water pump, seals, etc. I figure it's good for another 150K now. I have checked out Blazer forums for some of the normal stuff and usually read good stuff. I thought it was time to join, as there are fewer and fewer of these around.

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Welcome!

What prompted you to do the timing chain? Where there symptoms? Was it very hard to deal with the timing cover?

 

No symptoms - The oil pan was leaking. That's what started it all really. Since the pan was coming down, I decided to do the oil pump. I wasn't completely sold on the leak only being the oil pan. The front main seal is in the cover, so that was coming off anyway. I just decided to replace the wear items while I was doing all the stuff to fix the oil pan leak. The harmonic balancer was dried out and crumbled when I got it off - 2 pieces! I just kept changing stuff as I got to them. Since the water pump was exposed - might as well change that too. So, it was really a reliability based decision to just replace a bunch of stuff while I was there. Once everything is off - the cover is not too bad! I tried a cover only replacement years ago and had to drop the oil pan a bit to get the front lip out, so knew that the pan had to at least drop down.