name that sound. 99SS
Thread Starter
Staging Lane
Joined: Feb 2011
Posts: 50
Likes: 0
name that sound. 99SS Hey guys just got a 98 SS with 60k on it and I'm trying to diagnose an engine sound. It wont make it on a cold start, takes a few minutes to make it at idle and its worse point is around 1800 rpm give or take 100. You can hunt for it on start up and it will make it right at that rmp range but once it warms up its constant. I put some videos on youtube. The top one was after a well due oil change, but it was already warmed up and idleing at 1800 when I started recording, other two were a few days ago before oil change.
www.youtube.com/chriz2000wv
tell me what you think.
www.youtube.com/chriz2000wv
tell me what you think.
Thread Starter
Staging Lane
Joined: Feb 2011
Posts: 50
Likes: 0
oil pressure is good. can i check/change push rods without taking the heads off? at one point the other day when it was warm we all agreed it was coming form the passanger side....but im not positive now
Banned
Joined: Oct 2009
Posts: 992
Likes: 1
I watched your video and the oil pressure looks a little low. Warm the engine up completey and let idle. You should have 40 psi. Also make another video and rev it suddenly from a idle but not high. If its a rod bearing it will tap badly.
Thread Starter
Staging Lane
Joined: Feb 2011
Posts: 50
Likes: 0
I should be able to get another video up in the next day or so. But if it is something bad, like the bottom end or a spun rod I dont want to drive it. So I wont put it on the road aka make her legal. And since I probably wont be able to come up with a few thousand dollars to rebuild it what is the car worth as is? like I said it just turned over 60k. shes a 7 or 8 out of 10. 
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote Thread Starter
Staging Lane
Joined: Feb 2011
Posts: 50
Likes: 0
Didnt have time to do anything today but move it. But when I pulled it in today I noticed the psi was well above 40 on COLD start up, and of course the mystery sound was nowhere to be heard. just not sure about warm yet. Kind of hate letting it warm up but I guess the damage has already been done? If it needs rebuilt, is there a chance the block might be ok? because arnt the 98 blocks super think and cant be bored? even if i do have it done id want it stock
TECH Fanatic
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
Yes, you can. Just pull the valve covers, and rockers and you can get to the pushrods. Honestly, I've bent a pushrod before, and it kinda sounded like that. I guess you can expect the worst and hope for the best on this one. It's hard to tell from the video, but is the sound coming from the top?
I'd pull valve covers first before worrying aboiut what I was going to do or purchase.
That might be caused by the rollers coming out of the rocker arm (appears to be a common thing).
Search "trunnion upgrade" for more info. One of the common complaints was a "sewing machine" sound coming from the top of the motor.
Diagnose first. everything else second!
That might be caused by the rollers coming out of the rocker arm (appears to be a common thing).
Search "trunnion upgrade" for more info. One of the common complaints was a "sewing machine" sound coming from the top of the motor.
Diagnose first. everything else second!
With the scraping noise it sounds like it could also be a rocker arm that has puked out it's bearings. I would definitely pull the valve covers and inspect the rockers and pushrods first.
Thread Starter
Staging Lane
Joined: Feb 2011
Posts: 50
Likes: 0
either today or tomorrow im going to try to do that. and also here in a little bit im going to go get a mechanics stethascope and see if i can narrow anything down while its cold and barley making the noise. also how can i tell if the rock arm is bad? and if i find the bent rod is it as simple as putting a new one in it, tightening the rocker arm bolts to 22lbs, and putting the cover back on? that would be too good. but like you said...hope for the best expect the worse.
TECH Fanatic
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
either today or tomorrow im going to try to do that. and also here in a little bit im going to go get a mechanics stethascope and see if i can narrow anything down while its cold and barley making the noise. also how can i tell if the rock arm is bad? and if i find the bent rod is it as simple as putting a new one in it, tightening the rocker arm bolts to 22lbs, and putting the cover back on? that would be too good. but like you said...hope for the best expect the worse.
Thread Starter
Staging Lane
Joined: Feb 2011
Posts: 50
Likes: 0
the pressure has always looked good Thread Starter
Staging Lane
Joined: Feb 2011
Posts: 50
Likes: 0
ok...should be another video up in a second from inside the car, warmed up, hot. showing oil pressure...
www.youtube.com/chriz2000wv
the one uploaded today
www.youtube.com/chriz2000wv
the one uploaded today