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Engine Studs, How Many?


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#1 luismx123

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Posted 16 April 2019 - 06:45 AM

Is there a simple way to figure out how many studs I have? Is 9 standard for a 998? 

I want to learn to do the valve timings and im wondering if I need a 9 or 11 stud silicone rocker cover gasket...
Would both work?

Thanks



#2 nicklouse

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Posted 16 April 2019 - 06:46 AM

9



#3 KTS

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Posted 16 April 2019 - 07:44 AM

an 11 stud head would have an extra fixing visible at each end of the rocker cover; one by the heater take-off and one by the thermostat housing



#4 gazza82

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Posted 16 April 2019 - 10:48 AM

Don't only 1275 heads have an 11-stud version?


Edited by gazza82, 16 April 2019 - 11:12 AM.


#5 Compdoc

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Posted 16 April 2019 - 02:59 PM

Don't only 1275 heads have an 11-stud version?

I'm pretty sure that the 970cc and 1071cc "S" engines had 11 studs as well. Mind you, you don't fall over too many of these in 2019.



#6 Magneto

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Posted 16 April 2019 - 03:13 PM

But weren't the 970 and 1071 "big block" engines too?



#7 Cooperman

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Posted 16 April 2019 - 08:56 PM

Only the original Cooper 'S', 970, 1071 & 1275, had 10 studs plus one 5/16" unc bolt. That applied to the Mk.1. 2 & 3 versions.

 

Everything else has 9 studs.






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