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Author Topic:   Setting pre-load on hyd cam

Posts: 677
From: Sarasota, Fla. USA
Registered: Jun 99

posted 03-21-2002 12:42 PM     Click Here to See the Profile for Gary   Click Here to Email Gary     Edit/Delete Message   Reply w/Quote
What is the steps on setting the pre-load on a hyd cam? Im having a problem with the engine backfiring through the carb, I want to check the pre-load and see if it is correct.
351C 4V (Crane roller tipped rockers)

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capri man

Posts: 1267
From: doerun, ga.
Registered: Nov 2000

posted 03-21-2002 03:42 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
i used a dial caliper to check mine. i think you shouldnt get but about 1/4 turn past the point where you cant turn your push rods with your fingers. if i remember correctly it is about .020 to .030. someone please correct me if i am wrong.

mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.

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Posts: 30
From: Ont, Canada
Registered: Mar 2002

posted 03-21-2002 04:27 PM     Click Here to See the Profile for mustangboy     Edit/Delete Message   Reply w/Quote
If you can get the engine to idle I prefer to use the back it off till it ticks and then tighten till it stops method. and then turn 1/4 -1/2 a turn more.I find theres to much room for error usiing the method of turning the pushrod to feel for drag or until it stops turning.On my first engine build I never did get the pushrod to stop turning until I had bottomed out the lifter and ruined it.

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