[Steve91T]

Man I'm excited. Dailydriver posted his car for sale and I could tell from that add that it was much loved and well taken care of. Unfortunately a nasty knock on the engine forced him to sell it. I thought this could be the perfect car for my dad.

This car looks amazing for having 172k miles. It is pretty rare to find a 1 owner car these days.

So, first things first. I had the car for all of 30 seconds before I broke it. I dragged the exhaust pulling into my driveway and separated the car back from the y pipe. So today I fixed that so the exhaust wasn't dragging on the ground anymore. Next, I need to make room for all the parts Dave packed into the car. It's completely full of parts. Thanks Dave! And finally, I need to figure out what's up with the engine. It has a nasty knock. It has great oil pressure, runs smooth, no smoke, but knocks really bad. I think it's a lifter, but I don't know. I think I'm going to pull the valve covers and see what I find. As well as this car has been taken care of, I'm hoping the engine is healty. I'd love to just replace some lifters and let my dad enjoy this car for a while.

Anyway, let me know what you guys would do to diagnose this knock.


https://youtu.be/AJUsOvgpnmg

https://youtu.be/otobYePJLyo

[JimMueller]

Not sure what you might be willing to upgrade while you're taking things apart. That looks like the original LS1 valley cover, you might want to look into upgrading it to the LS6 cover (and new style of coolant crossover lines) if you can find the parts. You'll need to grind inside the valley to make it fit, though. Also put a dam of RTV around the top of the knock sensor holes to prevent water intrusion... lookup TSB #02-06-04-023. The LS6 intake manifold is a nice value upgrade over the LS1 unit if you don't already have one (and can find one). The intake ports are surprisingly clean.

Oh, and it's been 5 hours, that PS head should already be off (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif)

[Steve91T]

Not sure what you might be willing to upgrade while you're taking things apart. That looks like the original LS1 valley cover, you might want to look into upgrading it to the LS6 cover (and new style of coolant crossover lines) if you can find the parts. You'll need to grind inside the valley to make it fit, though. Also put a dam of RTV around the top of the knock sensor holes to prevent water intrusion... lookup TSB #02-06-04-023. The LS6 intake manifold is a nice value upgrade over the LS1 unit if you don't already have one (and can find one). The intake ports are surprisingly clean.

Oh, and it's been 5 hours, that PS head should already be off (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif)

Ha I gave up for the night. I have the rockers off and pushrods out and placed in a Cheerios box to keep them in order. Just have to pull the manifold and then the head tomorrow. I think the plan is to just get the thing running right now and figure out the grand plan later. For all I know it could have a bottom end problem or something. So that being said, is there anything wrong with just replacing the passenger side lifters? If my dad does want the car, I know a cam is in his future, so we'd probably upgrade to the ls6 manifold and replace the other lifters at that time.

It's so tempting to take that first step off the slippery slope, but I really want to just get it fixed and enjoy it for as little money as possible right now, even if it causes me more effort down the road. Plus I've never driven a stock LS1, so it'd cool to experience that.