went through 4 opti's in 250mi...wtf!
#21
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the opti replacements have all been returns though, so no $$ out of pocket
#22
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Take care
Rob
#23
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Camshaft End Play: .004”-.012”
Camshaft Gear Thickness: .235” MAX.
Camshaft Gear Mounting Bolt Head Installed Height: .200” MAX.
Camshaft Pilot Hole Depth: .360” MIN.
Camshaft Pilot Hole I.D. : MIN. .515”/ MAX .525”
Installed Stacked Pilot Hole Depth Total (as measured w/cam gear installed on cam): .590” MIN.
Camshaft Gear Pilot Hole I.D. : MIN. .515”/ MAX. .540”
Camshaft Mounting Bolt O.D. (as measured from hex corner to hex corner): .560” MAX.
Drive Dowel Height (as measured from camshaft nose face): .605” MAX.
Drive Dowel Height (as measured w/ camshaft gear installed): .375” MAX.
Drive Dowel O.D.: .250” MAX
Here you go have him check all of this....
hope he figures it out...I am bout as pissed with my car and a high rpm miss as he is with his I am sure...
Matt
Camshaft Gear Thickness: .235” MAX.
Camshaft Gear Mounting Bolt Head Installed Height: .200” MAX.
Camshaft Pilot Hole Depth: .360” MIN.
Camshaft Pilot Hole I.D. : MIN. .515”/ MAX .525”
Installed Stacked Pilot Hole Depth Total (as measured w/cam gear installed on cam): .590” MIN.
Camshaft Gear Pilot Hole I.D. : MIN. .515”/ MAX. .540”
Camshaft Mounting Bolt O.D. (as measured from hex corner to hex corner): .560” MAX.
Drive Dowel Height (as measured from camshaft nose face): .605” MAX.
Drive Dowel Height (as measured w/ camshaft gear installed): .375” MAX.
Drive Dowel O.D.: .250” MAX
Here you go have him check all of this....
hope he figures it out...I am bout as pissed with my car and a high rpm miss as he is with his I am sure...
Matt
#24
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id stop throwing optis at it like that theres obveously an issue besides the optis theres no way you got 6 bad optis and they all died that fast.......i've got a stock opti wit an msd cap and rotor on mine and ive been twisting the thing 8100rpm for two years wit no issues....ive built a few lt1's and only ran into one bad opti and it was an autozone special lol........first off check that dowel pin.... i can almost guarantee this is the issue also check the retainer plate holding the cam in and make sure the cam isn't walking in the block.......if that dowel pin is too long it WILL cause the issue you are experiencing......also like said above make sure the bolts you used are not contacting the base of the opti and pushing on it.......im willing to bet its one of those two things....probably the dowel pin........what year is the car? if its a non vented opti (93-94) the dowel pin is even shorter than the 95+ vented units......this is a common mistake that is made with the lt1's
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id stop throwing optis at it like that theres obveously an issue besides the optis theres no way you got 6 bad optis and they all died that fast.......i've got a stock opti wit an msd cap and rotor on mine and ive been twisting the thing 8100rpm for two years wit no issues....ive built a few lt1's and only ran into one bad opti and it was an autozone special lol........first off check that dowel pin.... i can almost guarantee this is the issue also check the retainer plate holding the cam in and make sure the cam isn't walking in the block.......if that dowel pin is too long it WILL cause the issue you are experiencing......also like said above make sure the bolts you used are not contacting the base of the opti and pushing on it.......im willing to bet its one of those two things....probably the dowel pin........what year is the car? if its a non vented opti (93-94) the dowel pin is even shorter than the 95+ vented units......this is a common mistake that is made with the lt1's
#27
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he said length of dowel pin from the gear is .345
length of pin from cam face is .650
actually, that could be the problem. When he removed the stock cam it had the dowel pin sheered off of it....
length of pin from cam face is .650
actually, that could be the problem. When he removed the stock cam it had the dowel pin sheered off of it....
#35
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Just curious where did you find these at/
Thanks
Rob
Thanks
Rob
Camshaft End Play: .004”-.012”
Camshaft Gear Thickness: .235” MAX.
Camshaft Gear Mounting Bolt Head Installed Height: .200” MAX.
Camshaft Pilot Hole Depth: .360” MIN.
Camshaft Pilot Hole I.D. : MIN. .515”/ MAX .525”
Installed Stacked Pilot Hole Depth Total (as measured w/cam gear installed on cam): .590” MIN.
Camshaft Gear Pilot Hole I.D. : MIN. .515”/ MAX. .540”
Camshaft Mounting Bolt O.D. (as measured from hex corner to hex corner): .560” MAX.
Drive Dowel Height (as measured from camshaft nose face): .605” MAX.
Drive Dowel Height (as measured w/ camshaft gear installed): .375” MAX.
Drive Dowel O.D.: .250” MAX
Here you go have him check all of this....
hope he figures it out...I am bout as pissed with my car and a high rpm miss as he is with his I am sure...
Matt
Camshaft Gear Thickness: .235” MAX.
Camshaft Gear Mounting Bolt Head Installed Height: .200” MAX.
Camshaft Pilot Hole Depth: .360” MIN.
Camshaft Pilot Hole I.D. : MIN. .515”/ MAX .525”
Installed Stacked Pilot Hole Depth Total (as measured w/cam gear installed on cam): .590” MIN.
Camshaft Gear Pilot Hole I.D. : MIN. .515”/ MAX. .540”
Camshaft Mounting Bolt O.D. (as measured from hex corner to hex corner): .560” MAX.
Drive Dowel Height (as measured from camshaft nose face): .605” MAX.
Drive Dowel Height (as measured w/ camshaft gear installed): .375” MAX.
Drive Dowel O.D.: .250” MAX
Here you go have him check all of this....
hope he figures it out...I am bout as pissed with my car and a high rpm miss as he is with his I am sure...
Matt
#36
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They are off the Dynaspark web page.. All of those measurements must be met for an opti to operate and seat correctly....
The Dynaspark is a Billet piece but uses the same dimensions and measurements as a GM or Delphi opti so the measurements listed also work for other optis too...
if all of them check out ok then its time to look elsewhere....
Here are a few more tips...
are you useing the same vacuum harness on all the optis you install?
Change the vacuum harness and the PCV valve before the next one and that may help...because If you have a bunch of oil in those lines and re-use them every time then it would not be a surprise that you are killing optis...
Also makes sure you Fuel pressure regulator is not leaking into the intake as this can also pre mature kill optis too...