Cascade Crew

91camaro_rs · Posted: Tue Jul 28, 2009 11:34 pm Post subject: knocking/ticking

well i was drivin around the KP just having some fun on the back roads and all the sudden the motor starts making a knock/ticking sound, i was like oh crap. at idle its not so bad, when i give it gas it gets worse and when i give it gas the tick gets faster......idk what it could be, i know that i was told that the valve covers leak and needed new gaskets, could that be the culprit?

fiveoformula · Posted: Wed Jul 29, 2009 1:30 am Post subject:

That could be bad if the valve covers leaked enough to where you lost alot of oil.. Did you check it?

91camaro_rs · Posted: Wed Jul 29, 2009 8:53 am Post subject:

oil and oil pressure is fine, someone said to me that it might be air getting sucked in thru the leak in the valve cover... idk if thats true or not

Twilightoptics · Posted: Wed Jul 29, 2009 9:03 am Post subject:

Sounds like an exhaust leak.

91camaro_rs · Posted: Wed Jul 29, 2009 9:07 am Post subject:

yeah oil was low but still in operating range, and ill check to see if i can find anything in the exhaust

91camaro_rs · Posted: Wed Jul 29, 2009 9:13 am Post subject:

ok well i know i have had a leak at the manifold flange, and i can hear that but its a different sound than the knocking

Al Hasse · Posted: Wed Jul 29, 2009 10:01 am Post subject:

fiveoformula · Posted: Wed Jul 29, 2009 12:22 pm Post subject:

91camaro_rs · Posted: Wed Jul 29, 2009 12:42 pm Post subject:

from what i can tell, its a constant tick tick tick no specific pattern, since the oil was low i added a quart, and i used a heavier oil to help with the heat a little, and the tick quieted way down but i can still hear it a little bit...

Al, how hard is it to tighten the manifold to y pipe flange, thats where mine is leaking

Al Hasse · Posted: Wed Jul 29, 2009 8:28 pm Post subject:

I took mine to an exhaust shop and they tightened it up for free. It's just a flange type fitting with a pair of studs on the manifold side and a nut to tighten each one down on the Y-pipe side. Should be able to reach it with a deep well socket (I forget what size).

91camaro_rs · Posted: Wed Jul 29, 2009 9:40 pm Post subject:

alright sweet thanks

and so i had a few of my car savy friends take a look at the knocking, they said it was the lifters, he said try changing the valve cover gaskets cause their leaking and try heaveir oil and if that doesnt work then ill need new lifters

Twilightoptics · Posted: Thu Jul 30, 2009 5:49 am Post subject:

Exhaust leaks often sound like lifters.

Why not try ADJUSTING the rocker arms first?

Al Hasse · Posted: Thu Jul 30, 2009 8:40 am Post subject:

I've always thought that the injectors firing sounded like a bunch of noisy lifters, at least with the hood up. One or two lifters would sound different though.

91camaro_rs · Posted: Thu Jul 30, 2009 9:47 am Post subject:

Quasi-Traction · Posted: Thu Jul 30, 2009 12:19 pm Post subject:

91camaro_rs · Posted: Thu Jul 30, 2009 1:54 pm Post subject:

ok cool, that sounds like it wont be too hard, and whats an easy way to check just to make sure its not an exhaust leak, is there something i can put in it to see if its leaking (thinkin maybe seafoam, when it makes all the white stuff come out?)

91camaro_rs · Posted: Thu Jul 30, 2009 5:14 pm Post subject:

well now that i remember that day the cat hit the ground on a steep hill, then i found these...(no wonder walts wanted $300 to fix my exhaust manifolds)

(broken bolt heads on manifold bolts....)

(Notice black on spark plug boot. and looks like the manifold chipped by the bolt)

so its probably an exhaust leak....idk what to do now get new manifolds or check rocker arms and lifters?

Twilightoptics · Posted: Thu Jul 30, 2009 5:28 pm Post subject:

Chris. Have I tought you nothing? Thats not a good way to set rockers. You have no way to be sure the intake is closed. Use the. Intake closed set exhaust, exhaust open set intake.

Looks like you found your tick though. $300 is about right. They e gotta pull the manifold and extract the broken bolt which can be very trying. Looks like he manifold isn't broken. Lots have that little chamfer.

aaron_sK · Posted: Thu Jul 30, 2009 8:10 pm Post subject:

Doesn't look too bad at all. Hit the manifold bolts with some PB Blaster overnight, pull the entire manifold, and then yank that bolt with vise-grips or any extraction tool.

Twilightoptics · Posted: Thu Jul 30, 2009 9:19 pm Post subject: