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Topic: ENGINE CLACK

in Forum: C3 Engines


ENGINE CLACK

Posted: 11/4/05 9:45pm Message 1 of 14
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DUNEDIN, FL - USA
Joined: 10/22/2004
Posts: 833
Vette(s): 1969 COUPE CORTEZ SILVER, BRIGHT BLUE INTERIOR 383 cu. in. 512 HP. Hooker headers w/ side pipes PS PS AC AM FM STEREO. 68,000.MILES C5 5oth Anniversary Coupe , auto.350hp

As I was driving on the high way i noticed a ticking noise coming from the engine compartment. As i drove further it became a clacking sound that increased as engine speed increase. Being far from home and on the highway i pulled off at a rest stop and lifted the hood to listen. Sounds as if it is coming from the top end on the passenger side toward the rear of the engine. I could here it real well ther with the stethascope.Suspeting a failing lifter.Planning on taking the intake off and checking on Sat. Any other suggestions anyone may have would be appreciated.    Bob




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ENGINE CLACK

Posted: 11/4/05 9:49pm Message 2 of 14
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Rocker arm nut loose
Rocker arm worn
Bent pushrod
Broken/collapsed valvespring
Bad lifter
Flat cam lobe

Hope its just a loose nut!


Joel Adams
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ENGINE CLACK

Posted: 11/4/05 10:00pm Message 3 of 14
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DUNEDIN, FL - USA
Joined: 10/22/2004
Posts: 833
Vette(s): 1969 COUPE CORTEZ SILVER, BRIGHT BLUE INTERIOR 383 cu. in. 512 HP. Hooker headers w/ side pipes PS PS AC AM FM STEREO. 68,000.MILES C5 5oth Anniversary Coupe , auto.350hp
A loose nut , wouldn`t that be wonderful. I `ll keep you posted. Thanks Joel


ENGINE CLACK

Posted: 11/5/05 6:37am Message 4 of 14
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KERNERSVILLE, NC - USA
Joined: 1/13/2004
Posts: 1355
Vette(s): 1968 L-71 convertible
Just pop the valve cover first, I've even seen broken rockers on higher mileage motors.


ENGINE CLACK

Posted: 11/7/05 1:23pm Message 5 of 14
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DUNEDIN, FL - USA
Joined: 10/22/2004
Posts: 833
Vette(s): 1969 COUPE CORTEZ SILVER, BRIGHT BLUE INTERIOR 383 cu. in. 512 HP. Hooker headers w/ side pipes PS PS AC AM FM STEREO. 68,000.MILES C5 5oth Anniversary Coupe , auto.350hp

Here`s the poop.

No loose rocker nuts, no bent or broken rods.

lifters showed a little wear .

Maybe a collapsed lifter,don`t know.

Dug a little further because i didn` tlike the way the vavle stems looked when i peeked through the head ports. Pull the driver side head off , flipped it  over and S@@# .Valves went from soot black to bright pink. Not the way they`re supposed to look. Also saw some scoring in the #7 cylinder.

Made up my mind.  time to build a motor.I`ll try to post pictures as I go.Want you guys to see this head though.I`m goint to start

pricing the parts.I`ll tell you what I`m looking to do.

I want to build out a motor with alot of torque,375 -400 hp.I would like to keep the Q-jet as I just re-built and can save $$ there. REplace intake manifold,Cam,lifter,etc. Replace pistons.Headers with side pipes. I want to budget this around $4500-$5000 Including Machining.I`ll be taking the motor apart and putting it back together with a little help from my friends. so that will Save some $. For those of you that gave me advise on the Torque Thruster wheels thank you.But they will be on hold awhile.And I was looking forward to that Turkey Rod thing in Daytona.

Any opinions?

Jump in anytime now!

Thanks, Bob 

 

 

 

 




ENGINE CLACK

Posted: 11/7/05 1:40pm Message 6 of 14
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San Pedro, CA - USA
Joined: 5/26/2005
Posts: 239
Vette(s): 1971, LT-1, T-top, 4-speed (M21), Mulsanne Blue, 3.70 rear, mostly original (sidepipes). 2006, Daytona Sunset Orange Coupe.
Are you sure that ticking sound wasn't an exhaust manifold leak?


ENGINE CLACK

Posted: 11/7/05 2:59pm Message 7 of 14
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DUNEDIN, FL - USA
Joined: 10/22/2004
Posts: 833
Vette(s): 1969 COUPE CORTEZ SILVER, BRIGHT BLUE INTERIOR 383 cu. in. 512 HP. Hooker headers w/ side pipes PS PS AC AM FM STEREO. 68,000.MILES C5 5oth Anniversary Coupe , auto.350hp

DEFINATELY NOT AN EXHAUST LEAK.




ENGINE CLACK

Posted: 11/7/05 7:23pm Message 8 of 14
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
[QUOTE=VETTERBOB] ... Pull the driver side head off , flipped it  over and S@@# .Valves went from soot black to bright pink. Not the way they`re supposed to look. Also saw some scoring in the #7 cylinder... [/QUOTE]

BOOOO!!!
That sucks!!
Sounds like you might have a timming problem? Running a little fat, maybe?


Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

ENGINE CLACK

Posted: 11/7/05 8:13pm Message 9 of 14
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!

The pink can be from octane boosters.  Some boosters use a chemical called MMT for short.  It leaves pink deposits.

The other problems are another issue.  You may want to consider building a 383 stroker if you decide to go full tilt.




ENGINE CLACK

Posted: 11/8/05 10:39am Message 10 of 14
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Irving, TX - USA
Joined: 8/21/2004
Posts: 4273
Vette(s): #1 -1969 Corvette Coupe Riverside Gold, black interior,MN,A/C,350/350,PS,PB,window cranks. #2 -2000 C5, black/black, 6 sp, Bose system & lots of buttons.
[QUOTE=kstyer]

The pink can be from octane boosters. Some boosters use a chemical called MMT for short. It leaves pink deposits.


[/QUOTE]
OH NO!! So, using an octane booster with MMT is not a good thing, huh??



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in Forum: C3 Engines


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