Delayed tick in top end

[fuccillo111]

I used to run Rhoads lifters in my circle track car back in the day to reduce the duration slightly to meet the vacuum rule. With mufflers on you could hear the lifters ticking at low RPM but once it got above maybe 2500 RPM it went away. This is the way they sound because they are bleeding off oil inside the lifter to make the cam seem smaller down low.

I'm leaning toward changing the lifters then. If it were the rockers what are the odds I'd hear it from both sides at a particular time into idle. Thanks for the suggestiins.

 

[pontiacgp]

changing them might not be a bad idea...

http://www.jalopyjournal.com/forum/threads/rhoads-lifters-good-or-bad.454737/

 

[Pontiac455]

Was the cam broke in properly with a zink additive in the oil?

 

[fuccillo111]

Was the cam broke in properly with a zink additive in the oil?

In my opinion it wasn't broke in properly. 10 minutes at 2000k but we shut it down half way through to tighten leaking hoses. I will say I heard the ticking as soon as the motor heated up just not as loud.

 

[pontiacgp]

how long was the engine shut down? this is one reason I like my roller cam

 

[fuccillo111]

how long was the engine shut down? this is one reason I like my roller cam

Approx 20 mins

 

[565bbchevy]

Hopefully you didn't wipe out any cam lobes with your break in.

 

[fuccillo111]

Hopefully you didn't wipe out any cam lobes with your break in.

I hope not either, sounds nice n lobey. It just weird how at idle for the first few minutes there's no sound, then the ticks show up once its warm, both sides same time. Gota be lifters.

 

[fuccillo111]

I hope not either, sounds nice n lobey. It just weird how at idle for the first few minutes there's no sound, then the ticks show up once its warm, both sides same time. Gota be lifters.

Found every header bolt was loose some not even finger tight. This unfortunately didn't solve the problem.

 

[pontiacgp]

I use wedge lock bolts on my headers and they stay tight