I've had my GN for 20 years now and have had no real reason to pull the engine until now, the motor is leaking oil from every seal and will need some new seals. The car has around 37 thousand miles on it and has simple bolt on modifications as far as I can tell. It's running 42.5lb lucas injectors, an aftermarket chip(I think it's a Red Armstrong), a K&N cold air kit, the only other additions I can see is an adjustable waste gate actuator and a few gages and a cat delete pipe with cut out. I have added a walbro 340 pump with a Racetronix hot wire kit, an adjustable fuel pressure regulator, a 3 inch downpipe, and a rear seat brace kit. The previous owner set the had the boost set to 19 pounds and I haven't dinked with it.
So while the engine is out what is the recommended items to look over and replace? I have a new bunch of seals including rear main, new 100lb valve springs, a new(20 year old) front timing cover with high volume oil pump as well as new timing chain and sprockets. I'm not looking to build it up to be a race car just would appreciate input on what's normally an issue, so I can get it taken care of before putting the motor back in. I only intend on pulling this engine once as it's gotta be one of the more pain in the but motors to pull. I've pulled dozens of 3.8 engines out of buick regals and rebullt them back in the 80's but those were all carbed low horsepower jobs, these turbo models are a different breed all together.
I suspect this is not the first time parts of this engine have been toyed with. There were a few bolts missing on some of the oil pan, transmission cover and even one of the torque convertor bolts were missing. I've found many bolts for valve covers, sensor brackets and others just finger tight. while others are tighter than they need to be. So either GM built this on a Friday or a Monday and didn't care too much about quality checks, or someone else has had their fingers in the pie.
Anyhow, I could really use the input.
So while the engine is out what is the recommended items to look over and replace? I have a new bunch of seals including rear main, new 100lb valve springs, a new(20 year old) front timing cover with high volume oil pump as well as new timing chain and sprockets. I'm not looking to build it up to be a race car just would appreciate input on what's normally an issue, so I can get it taken care of before putting the motor back in. I only intend on pulling this engine once as it's gotta be one of the more pain in the but motors to pull. I've pulled dozens of 3.8 engines out of buick regals and rebullt them back in the 80's but those were all carbed low horsepower jobs, these turbo models are a different breed all together.
I suspect this is not the first time parts of this engine have been toyed with. There were a few bolts missing on some of the oil pan, transmission cover and even one of the torque convertor bolts were missing. I've found many bolts for valve covers, sensor brackets and others just finger tight. while others are tighter than they need to be. So either GM built this on a Friday or a Monday and didn't care too much about quality checks, or someone else has had their fingers in the pie.
Anyhow, I could really use the input.