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Engine Build Questions

  • Thread starter Thread starter 94 Cob
  • Start date Start date Apr 16, 2011
9

94 Cob

New Member
Nov 29, 2010
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NC
Apr 16, 2011
#1
  • Apr 16, 2011
  • #1
Need some help!

I got the new 302 in the car. I went to set the dizzy in and ran into two problems:

1. Trying to find top dead center on the compression stroke and I'm not feeling any air push out the number one spark plug hole while turning the crankshaft. Does this mean that I tightened the rocker too tight and the valves are sitting open?
Thoughts?

2. The dizzy won't seat all the way. It couldn't be any closer to touching the block but it still is not all the way down. Any ideas to what would cause this?

Very frustrating.
 

RIO5.0

15 Year Member
Feb 16, 2001
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Apr 16, 2011
#2
  • Apr 16, 2011
  • #2
1... pull the valve covers...rotate the motor til you see the balancer come up to 0 on the timing mark...look up and see it both valves are closed on #1 cyl.
if not then keep turning the motor over (clockwise) til this happens. Once both are closed and your on 0 your TDC.

2... you prolly need to lift the dizzy up a tad, rotate the pointer a little and then drop back down...sounds like your not quite engaging on the cam so it wont drop down. you need to catch the cam gear to mesh the dizzy...can be tricky to feel it.

how much did you TQ the rocker bolts??? should only be 5/8 to 3/4 turn after zero lash.
 
9

94 Cob

New Member
Nov 29, 2010
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Apr 17, 2011
#3
  • Apr 17, 2011
  • #3
I took the rockers to zero lash and then tightened them to 18lbs of torque. It usually came out to be about 3/4 a turn.
 

RIO5.0

15 Year Member
Feb 16, 2001
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Apr 17, 2011
#4
  • Apr 17, 2011
  • #4
That amount sounds fine...they shouldnt be hung open. what method did you use to get zero lash before TQing?

when exh starts to open adjust intake
when intake is almost closed adjust exh
 
9

94 Cob

New Member
Nov 29, 2010
29
0
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NC
Apr 17, 2011
#5
  • Apr 17, 2011
  • #5
I put it at TDC and adjusted the number one valves and then turned the crankshaft 1/4 turn and followed the firing order turning the crankshaft 1/4 turn each time. I tried the dizzy again today and still it does not seat all the way. Could it be the oil pump shaft is too long?
 

revhead347

Apparently my ex-husband made that mistake.
20+ Year Stangneter
Jun 14, 2004
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Acworth, GA
Apr 17, 2011
#6
  • Apr 17, 2011
  • #6
Not likely. Sometimes they are just a bitch to seat. The rotor is going to twist when it goes down. Try moving the rotor back and forth and wiggly it down.

Kurt
 
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