Top End noise after rebuild

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Nov 10, 2020 | 01:54 PM

calin

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Cruiser

Joined: Jun 2005

Posts: 104

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Top End noise after rebuild

Just finished my 88 > 95 build and all went well in many thanks to this forum

The only issue seems to be some top end noise that I think I can eliminate with a pushrod adjustment from 2.5 to 3.5 turns. I have SE Adjustable (18404-08 @ 24 tpi) with S&S Lifters so I have them at 2.5 turns per instructions (also installed rocker lockers)

My question is can I simply pop the PR clips, loosen the locknuts and add a single turn to bring me to 3.5 – which seems to be the sweet spot from my forum searches on the subject.

If not and I need to do the adjustment over from start – are there any precautions I need to take when removing the pushrods – do I just back them down and remove them 1 at a time – then get my lobes on base – get to zero lash and add my 3.5 turns?

Thanks in advance

Calin

Nov 11, 2020 | 12:10 PM

calin

Thread Starter

Cruiser

Joined: Jun 2005

Posts: 104

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Any help would be appreciated -
is there any reason I can just open PR tubes , loosen lock nut and add a turn to the pushrod (for a total of 3.5)

TIA

Nov 11, 2020 | 12:34 PM

Seasoned HDF Member

Joined: Mar 2012

Posts: 100,455

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From: Centennial, CO

I would set the cams at at base circle.

Nov 11, 2020 | 05:35 PM

marcodarq

Grand HDF Member

Joined: May 2014

Posts: 3,852

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From: florida

you can do what you are talking about. i would not go to 3.5 turns, the SE pushrods have a courser thread pitch, 3.0 turns should be just fine. get the cam for the cylinder that you are working with on the base circle first, then procede.
m

what kind of noise do you have? make sure that your rocker boxes have enough clearance around the valve springs while you are in there.

Nov 11, 2020 | 06:46 PM

calin

Thread Starter

Cruiser

Joined: Jun 2005

Posts: 104

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thanks to all , i ended up doing the whole process over and did the 3.5 turns. the motor quieted down and now sounds great.
it was a tapping sound now gone. i did put in the rocker lockers when i was puting it together.
Next up is to seal up the rings
i could always ba k off 1/2 turn if 3.5 is to deep.
i found many opinions on this and i thought 3.5 was the sweet spot
thx