Thread: Fresh BBC; Noisy Valvetrain

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Spray spam cooking oil on them and should be able to re-use.

Originally Posted by FAYLUR

Spray spam cooking oil on them and should be able to re-use.

serious?

What do you think about my observations?

did the car have a soild cam in it ? did someone put oil restrictors in ??did you take them out ?

Originally Posted by DennyW

I'll go further with the tapping lifter. You say it is pumped up, and that is the normal thing to look for. That means it is getting oil ok. Now, what if the lifter can not bleed down. If a lifter only pumps up so far, and stays there, it will tick also. See what I mean on that ?
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I see what you mean and I had (EDIT: had NOT...) thought of looking at it from a "cant bleed down" perspective. The most I can do at this point is just replace it and throw it back together. Odd question: Does the tick happen when the valve closes (when there is very little load on the lifter) or when the valve opens?

It just bugs me when I dont know exactly whats going on.

Pat, not a solid and never had one. It was a stocker w/ hydraulic. Never been apart until the day I bought it (to my knowledge).

thanks guys.

Originally Posted by DennyW

If you have low oil pressure, they will tick more on the low rpm's most of the time....

Have excellent oil pressure...havent noticed a change with rpm.

Originally Posted by DennyW

If the oil pressure is high, they will not usually have a chance to tick...

Ticks with good oil pressure...

Originally Posted by DennyW

The thing is, you know the lifters are working because of the example of the low oil pressure. They tick at idle, but the tick goes away at higher rpm's. With high oil pressure, and they tick, then that is a lifter or oil gallery problem, especially if it's on one bank of cylinders (one side only). You say number 8 is the ticker. I would say that that lifter is bad.

Since I had no problem priming the motor, I would agree on the lifter...high oil pressure AND ticking...they are not ALL noisy on that side...some are very quiet.

Originally Posted by DennyW

...you can see that several things can be wrong inside the lifter. ..

You got that right...it drives me nuts to think about what is happening inside them at different rpms...

You made perfect sense Denny, I just needed to break it down...Thanks for the input...