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> The new to me 1SC....
Steve91T
post Jul 22 2016, 05:47 AM
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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
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BumpaD_Z28
post Jul 22 2016, 06:48 AM
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WOW I don't think I'd keep running it, ...

but get the valve covers pulled and I'm guessing broken parts will be present (IMG:http://www.frrax.com/rrforum/style_emoticons/default/sad.gif)
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trackbird
post Jul 22 2016, 03:40 PM
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Drain the oil into a clean pan and look for metal. I found a spun rod bearing in the TBSS LS2 we rebuilt a year or so ago by finding bearing material in the oil when I drained it. It looked like metal flake paint. That was a sure sign the engine needed to come out. I haven't had a chance to listen to the video yet. If you find needle bearings on the oil pan drain plug magnet, start looking at the rocker arms. If you find metal flakes in the oil, I'd suggest that it's time for it to come out onto a stand and be rebuilt.

If you go to Home Depot, you can buy a large "wall paper pan". It's a big tray made of a flexible black plastic that works great for catching antifreeze, oil, ATF, gear lube, etc. They aren't too expensive and a clean one is great for looking for bearing material with a bright light as you slosh the oil in it. And brake clean hasn't softened one up yet (backing my 3rd gen down off the ramps with the pan still under it....that tends to soften them up a bit...lol).
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nape
post Jul 22 2016, 04:52 PM
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One hillbilly way to find out if it's in the bottom end is to drain the oil and refill with straight 50 or 60w. If it quiets down, it's almost certainly a rod/main bearing. If it doesn't, could be a lifter.

Either way, I wouldn't run it too long. Something is definitely wrong and more run time increases the chance of carnage.
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Steve91T
post Jul 22 2016, 04:55 PM
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QUOTE (nape @ Jul 22 2016, 12:52 PM) *
One hillbilly way to find out if it's in the bottom end is to drain the oil and refill with straight 50 or 60w. If it quiets down, it's almost certainly a rod/main bearing. If it doesn't, could be a lifter.

Either way, I wouldn't run it too long. Something is definitely wrong and more run time increases the chance of carnage.



Yeah I have no plans on going anywhere in it.
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Steve91T
post Jul 22 2016, 05:17 PM
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I just got off the phone with the original owner. He told me it started after getting off the highway. Just cruising in 6th. When he came to a stop, he heard the knocking. That was back in January. He has changed the oil 4 times since then, trying differently weight oils. No metal was every found in the oil. 2 months ago, he changed the rockers and pushrods.

So, it's not the bottom end. The car has driven nearly every day for 6 months with this knock and it's not making metal. If it was in the bottom end, there's no way it'd still be running. It's probably a failed lifter.
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Ojustracing
post Jul 22 2016, 05:21 PM
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That really sounds like valve train. Use a long screw driver to narrow down the side. But if it is. half the motor has to come out to change the cam and lifters. Maybe it even spit a rocker arm bearings out and has a bunch of play in rocker arm pre-load. You can remove the coil pack assembly and then valve cover. I'd look around first. You could run it with the valve cover off also.

I saw you posted while typing. If rockers/pushrods have been changed I too would suspect Lifters. But I would want to know which one. By the sounds of it. You should be able to run the engine and find which rocker arm has the extra play.

This post has been edited by Ojustracing: Jul 22 2016, 05:25 PM
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CrashTestDummy
post Jul 22 2016, 07:20 PM
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As John said, pull the covers and look for a dead rocker or broken spring before running it anymore. It really sounded to be louder on the passenger side when I listened to the video.

This post has been edited by CrashTestDummy: Jul 22 2016, 07:33 PM
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Steve91T
post Jul 23 2016, 01:58 AM
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Gave her a bath tonight! 172k miles people.

(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/0F2C85A0-15EF-47B0-9C51-18FE8A17B24C.jpg)

(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/410CF641-86F3-4327-9262-026AAF9E9AA4.jpg)

(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/418C07B2-3BE7-4C04-B5C1-F35DA7469765.jpg)

(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/51B51548-79C4-4580-B0AB-D831A799F6DE.jpg)

My 2 yr old saying "cheese!"
(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/B3C8EB22-5A2E-464C-BE58-47E44C106949.jpg) (IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/736323D7-9740-41A5-8AC5-12C65535EE5E.jpg)


(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/449C1F14-BF2A-4A58-9326-F9953D110021.jpg)

3 good size dents. These are the only dings on the car. I'm going to email a good car detailed in my area. He recently posted link to a guy who removed hail damage out of a hood without damaging the paint. But let's look at that shine!


(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/AFE22B0B-8027-4977-A037-7A91C4165C29.jpg)
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CrashTestDummy
post Jul 23 2016, 02:38 AM
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Tip him! Painless dent removers are awesome!,
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trackbird
post Jul 23 2016, 02:41 AM
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QUOTE (CrashTestDummy @ Jul 22 2016, 10:38 PM) *
Tip him! Painless dent removers are awesome!,

I need to find a good one for my car. It has a small assortment of door dings in the rear quarter panels and one in the hood???
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Steve91T
post Jul 23 2016, 03:41 AM
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QUOTE (CrashTestDummy @ Jul 22 2016, 10:38 PM) *
Tip him! Painless dent removers are awesome!,


I know, right? I've never used them. Figured those dents would be easy for them.
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Steve91T
post Jul 23 2016, 03:42 AM
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QUOTE (trackbird @ Jul 22 2016, 10:41 PM) *
QUOTE (CrashTestDummy @ Jul 22 2016, 10:38 PM) *
Tip him! Painless dent removers are awesome!,

I need to find a good one for my car. It has a small assortment of door dings in the rear quarter panels and one in the hood???


I'll try to get ahold of the guy and let you know how much. I have absolutely no clue what "normal" is. You do the same.
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nape
post Jul 23 2016, 05:09 AM
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I'm jealous. That's a lot cleaner than the 165k mile '98 I picked up as a parts car for not much less money.

I had to snap it up though with all people parting them out then asking $2500 for the T56 swap or $3500-5000 for the engine/T56.
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Steve91T
post Jul 24 2016, 07:56 PM
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QUOTE (CrashTestDummy @ Jul 22 2016, 03:20 PM) *
As John said, pull the covers and look for a dead rocker or broken spring before running it anymore. It really sounded to be louder on the passenger side when I listened to the video.



Yep, it's the right side. It's parked until later this week when I have a chance to pull the valve covers.
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Steve91T
post Jul 24 2016, 08:01 PM
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QUOTE (nape @ Jul 23 2016, 01:09 AM) *
I'm jealous. That's a lot cleaner than the 165k mile '98 I picked up as a parts car for not much less money.

I had to snap it up though with all people parting them out then asking $2500 for the T56 swap or $3500-5000 for the engine/T56.


Yeah I bought it sight unseen. Dave couldn't send me pictures. So it was a little scary. But the price was right so if the car was trash, I would be able to part of out and probably end up making money. That would be a last resort.

Needless to say I was thrilled when the car showed up.
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CrashTestDummy
post Jul 25 2016, 02:41 AM
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Heh, 2yo saying "cheese", thinking "yeah, this will be my car. You better fix it, Daddy!". (IMG:http://www.frrax.com/rrforum/style_emoticons/default/2thumbs.gif)
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Steve91T
post Jul 25 2016, 10:56 PM
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QUOTE (CrashTestDummy @ Jul 24 2016, 10:41 PM) *
Heh, 2yo saying "cheese", thinking "yeah, this will be my car. You better fix it, Daddy!". (IMG:http://www.frrax.com/rrforum/style_emoticons/default/2thumbs.gif)



Oh yeah she was totally thinking that!
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Steve91T
post Jul 25 2016, 10:59 PM
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I've been busy with recurrent training and had to rest my little brain so I decided to finally unpack the car. I didn't vacuum or anything, just pulled the many many boxes of parts out of it.

(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/223B3ECB-C129-44CF-A11D-BF8EDF78E4BE.jpg)

Drivers seat.

(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/F5518103-AF91-431B-A03A-F0AA9E5459E7.jpg)

(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/DBC8E623-941B-463D-886A-4F5DD6D54219.jpg)

I have no idea where I'm going to put all of this. I haven't gone through them yet.


(IMG:http://img.photobucket.com/albums/v199/Steve91T/Camaro/29334820-F3CA-46B5-AFE5-09C4BD041D31.jpg)
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robz71lm7
post Jul 26 2016, 11:04 PM
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Sounds deadup just like my LT1 with a bad lifter. I vote valvetrain. If that fixes the noise then get an oil analysis to determine you don't have a bearing issue as well.

Use a mechanics stethoscope and you should be able to pinpoint the cylinder.
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