Knock after cam install
Knock after cam install Recently, I installed a cam(custom bret bauer), springs,retainers,etc..I got the motor buttoned back up, except the radiator/fans, and the W/P...Fired it up for a few seconds, and there's this knock noise..So, I adjusted the valves, and tried it again..Still there. Whats goin' on? Slack in the timing chain? Cam bearing? The whole motor(383) has almost 9-10k miles on it..
Knock after cam install I recently installed a BRE custom cam/beehive springs...After intial start-up, I have developed a knock noise coming from my motor, and I dont think there is any oil getting to the top end(lifters pumping up,etc)..I have over 40psi oil pressure on my gauge, my SES light is on, and both of my fans are running...I haven't put any road miles on this setup, due to this noise...Can anybody help me??
TECH Apprentice
Joined: Nov 2004
Posts: 333
Likes: 0
From: Chitown
Originally Posted by flyinZ
I recently installed a BRE custom cam/beehive springs...After intial start-up, I have developed a knock noise coming from my motor, and I dont think there is any oil getting to the top end(lifters pumping up,etc)..I have over 40psi oil pressure on my gauge, my SES light is on, and both of my fans are running...I haven't put any road miles on this setup, due to this noise...Can anybody help me??
Wat codes is it throwing? and I developed a knock after a cam install too. It was a seized rod bearing though
Kinda common from higher mileage LT1 cars after a cam only install Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
That is why I love my 93'. Just bridge the diagnostic and ground terminals and turn the key to the on position. Simple shtuff. 
On my car it throws code 15 which is low temperature indicated, and the fans run a lot more than they should so it never heats up to normal temp. I replaced the thermo becaust old one was stuck open and problem came back so I am replacing the coolant temp sensor tomorrow. Could be why your fans are running all the time. But that has really nothing to do with the knock.
On my car it throws code 15 which is low temperature indicated, and the fans run a lot more than they should so it never heats up to normal temp. I replaced the thermo becaust old one was stuck open and problem came back so I am replacing the coolant temp sensor tomorrow. Could be why your fans are running all the time. But that has really nothing to do with the knock.
I replaced the coolant temp sensor, last year ,and the thermostat is just a few years old(Hypertech 160*)...Nah, I doubt its the rockers, we've adjusted them twice so far..Any ideas why oil isn't getting to the top?? Could it be a cam bearing?
CD-33, from what i hear, big cams will throw this code, at least until its tuned. CD-42 has to do with a short/ground in my ignition control. CD-83 has to do with the TCC control solenoid..Does it mean its going bad? Anybody?
