pushrod length?

**Edward-T** · 10-19-2011, 07:11 AM

what lenght to get rid of the sewing machine noise? TSP v2 cam, 595/598 lift on a 112, ported and polished LS6 heads(new castings), comp cams street strip lifters,chrome moly pushrods - 7.350 length. still have the noise and i hate it, are they too short? too long? or am i just being to picky?

**blackSS01** · 10-21-2011, 03:18 AM

Best way to figure out length is to measure them. Only need to pull 1 out to do it. Either that or re-check tightness of the rocker arms. LS1's are known to be pretty noisey when you mess with the valvetrain.

**ls1camino** · 10-21-2011, 04:04 AM

Mine were too long when I did my head/cam swap. After I measured and intalled the correct length, I still had some valvetrain noise. It gets guiet once the engine warms up though.

Buy a pushrod length checker and find out what you should have.

**Edward-T** · 10-21-2011, 04:05 AM

how do you check for the correct length?

**ls1camino** · 10-21-2011, 04:08 AM

Originally Posted by ls1camino

Buy a pushrod length checker and find out what you should have.

Originally Posted by Edward-T

how do you check for the correct length?

**ls1camino** · 10-21-2011, 04:11 AM

Comp Cams Pushrod Length Checker 6.800-7.800, Comp 7702-1, Comp Push Rod

**Edward-T** · 10-21-2011, 04:14 AM

i know that, i'm saying do i need to have it on TDC or intake valve open or exhaust valve open, or what?

**ls1camino** · 10-21-2011, 04:35 AM

It comes with instructions, I don't remember the specifics, but you do want the engine to have been brought up to operating temp, cause you want your hydraulic lifters to be filled with oil.