OK Guys, need some serious help!!
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Im guessing if you dropped something in there you would have really damaged somethign and would have worsened by now. Betting its in the valvetrain. Loose rocker, a stud that could have worked its way loose, etc. Check carefully. Yes, studs are torqued down tight but it has happened. I would be t the farm your cylinders are fine. Washing down the cylinders, doubtful.
Its somethign simple, it didnt do it before you removed injectors.
Take a deep breath, turn your head off for a minute and start over.
Its somethign simple, it didnt do it before you removed injectors.
Take a deep breath, turn your head off for a minute and start over.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Has ANY of the above listed tests been performed yet?? These are the proper methods to isolate the cause of you noise. Do what these guys are saying.
A tip to add to what Pete K and Joe said: Don't pull plug wires off; that's a great way to get shocked, which I'm sure you knwo, sucks. Apply some dielectric grease to the tip of a test light. W/the test light grounded, back probe the plug boots. This will ground the spark and produce the same result as pulling wires...but w/o the shock or anxiety of "getting it".
A tip to add to what Pete K and Joe said: Don't pull plug wires off; that's a great way to get shocked, which I'm sure you knwo, sucks. Apply some dielectric grease to the tip of a test light. W/the test light grounded, back probe the plug boots. This will ground the spark and produce the same result as pulling wires...but w/o the shock or anxiety of "getting it".
When I post the video, that should help. I fear something did get down the hole.
Burning Brakes
Joined: Sep 2006
Posts: 1,202
Likes: 3
From: MD
Not to mention, cranking it by spinning the flywheel with the starter produces entirely different motions and forces than running it, in which the vertical motions of the pistons have to be translated into rotations. If it's a bearing (which I still doubt) it won't show up cranking because that isn't putting nearly the side-loading on the crank journals.
Now, if it were carbon or a nut in a cylinder that was that loud it likely wouldn't be able to crank, or you'd hear it when the starter came up against the debris and it slowed for a sec or something.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
Was gonna suggest the magnet thing but 87 rag beat me to it. That is the first thing I'd do now. You can get one of the tiny ones and slip it into each hole.....if something went down you'll get pieces of it. I wouldn't run it again until I tried this. Been there.
Burning Brakes
Joined: Sep 2006
Posts: 1,202
Likes: 3
From: MD
Reminds me of the time my Mom got home from work. She was driving a '76 Nova at the time (yeah, it was a rusty piece of crap). Anyway, she came in and told my Dad "The car's making some funny noises". He came out and she started it up and the car went BANG BANG BANG BANG KAAA_BBOOOMMMM and stopped running. Turned out the spot weld had cracked off the stud that held the air cleaner on and it worked it's way down into the engine. Hit a valve for a while, then finally made it all the way into a cylinder and that was it. Meh, it was just a 307, but it did run for like 15 minutes with the stud lodged half in the cylinder (basically acted like a stuck valve) until it finally finished her off.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Just got home from work.
Here's the link, if someone can embed it, thanks.
http://youtube.com/watch?v=r1TrI7R5nKI
I was on the phone with a forum member. He said "don't sound good" at the end. I said I know it don't. That splains that.
Last edited by jsup; Apr 2, 2008 at 07:54 PM.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Man, can't a guy earn a living.....
Just got home from work.
Here's the link, if someone can embed it, thanks.
http://youtube.com/watch?v=r1TrI7R5nKI
I was on the phone with a forum member. He said "don't sound good" at the end. I said I know it don't. That splains that.
Just got home from work.
Here's the link, if someone can embed it, thanks.
http://youtube.com/watch?v=r1TrI7R5nKI
I was on the phone with a forum member. He said "don't sound good" at the end. I said I know it don't. That splains that.
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Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
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From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
I'm gonna try taking off the top of the SR plenum and sticking a magnet down the runner holes to see if anything comes out......before I take it all apart.
Racer
Joined: Jul 2000
Posts: 345
Likes: 2
From: Arlington Wa
To my ears it does not sound like a rod knocking. This is based on 3-4 engines with rods knocking that I have personally experienced. It sure sounds like a noise coming from the valve train. This is just my opinion.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 35,065
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From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
Anyone think it could be a nut or something down on top of the valve that is slapping around when the valve goes up and down?
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Too fast and too high pitch to be a rod knock. Somthing is hitting something. I'd look at the flywheel, timing chain, balancer, etc.
Make sure one of the weights spot welded to the torque converter isn't hitting the inspection cover. It sounds vaguely familiar.
-- Joe
Make sure one of the weights spot welded to the torque converter isn't hitting the inspection cover. It sounds vaguely familiar.
-- Joe