Rolling And Rocking.

[F. Jason Garriott]

Hi All:
My '05 4.6 is ticking and most likely needs new valve lash adjusters. Should I replace the roller-rockers too?
Should I put new roller rockers against an old cam? Any clues would be helpful. Thanks!

 

[Bullitt95]

Did you check the oil level recently? What oil are you using?
Insufficient oil or the wrong viscosity of oil could cause the symptoms you've described.

 

[F. Jason Garriott]

Thanks for your reply, Bullitt. I'm pretty religious about maintaining the oil. 5W20, no more than 1/2 quart low at any time. Loud tick isn't localized to left or right side.

 

[timjimmy]

Pull the adjusters and check how much play are in them with a dial indicator. I can't remember the limits off the top of my head, but it should be an eighth or a quarter inch. I'll check my manual later today.

 

[F. Jason Garriott]

Thanks, TimJimmy:
I'm actually replacing the adjusters, and chains because it has 158,000 miles. I have all the parts. I bought roller rockers too. The big question is can I put the new roller rockers in against the old cam?

 

[timjimmy]

Yes. Roller rockers, followers, etc are function much different than flat tappets. Whereas flat tappets have a "break-in" period during which the lobe of the camshaft and hydraulic lifter wear each other down and harden, rollers simply act like a bearing. All that friction and wear is eliminated. Unless you can see visible damage or wear to the old cams and followers, it will work fine. If you'd like, I have a pair of cams off my '06 I'd be willing to part with. They had about 40,000 when I swapped them out.

 

[F. Jason Garriott]

You're the king, TimJimmy. I suspected that was true, and thanks for the advice. I'll ponder the cams. What else have you done to the '06?

 

[timjimmy]

Sure thing. It has ported heads, Detroit Rockers, FRPP manifold and throttle body C&L Racer intake, Brenspeed tune, Kooks long tubes with Pypes exhaust (I may switch back to Magnaflows), a Performance Automatic 3,000 RPM torque converter, Shelby rims, lowered 2", and a chin spoiler.

 

[F. Jason Garriott]

Hey, TimJimmy:
How does the Kooks/Pypes set-up sound in the car?
My stock car sounds better than Corvette, Viper, and most italian supercars.
A 911 might sound marginally better.

Please advise.
Thanks, TimJimmy
Jason

 

[timjimmy]

Keep in mind it has the aftermarket cams, but at idle it's deep and fairly loud, light throttle is smooth and even and a bit louder, cruise quiets down a bit but has some drone over 2200, and wide open gets a bit higher pitched and absolutely screams. At idle, most people compare it to an old muscle car.