EVO All Evo Model Discussion

extra hole

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Old Aug 30, 2010 | 11:10 AM
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jim h
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hi crew
i have bought a set of se heads for my 85 lowrider have an extra hole in them it is located on the pushrod side inbetween the headbolts
the hole is threaded and blind any ideas what its for

thanks
jim
 
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Old Aug 30, 2010 | 03:47 PM
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Engine temperature sensor for EFI
 
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Old Aug 30, 2010 | 04:37 PM
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thanks for that
do you think i should plug them before using

thanks jim h
 
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Old Aug 30, 2010 | 04:41 PM
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Sounds like it was set up for dual plugs.
 
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Old Aug 30, 2010 | 08:38 PM
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After rereading the post, those holes are something else, the temp sensor is in the front head only and in the front side center. Possibly compression release holes if they go into the combustion chamber or I've heard of people talking about predrilled compression releases in SE heads that are just guide holes that need finished off but I thought that was just a Twin Cam SE head?
What are the part numbers stamped in the castings?
 
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Old Aug 30, 2010 | 08:46 PM
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Originally Posted by 1997bagger
After rereading the post, those holes are something else, the temp sensor is in the front head only and in the front side center. Possibly compression release holes if they go into the combustion chamber or I've heard of people talking about predrilled compression releases in SE heads that are just guide holes that need finished off but I thought that was just a Twin Cam SE head?
What are the part numbers stamped in the castings?
My compression releases are next to my plug holes on the left side. That's why i thought those heads were set up for dual plugs.
 
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Old Aug 31, 2010 | 10:12 AM
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Lonewolf, good possibility of dual plugs but the mentioning of blind holes has me throwed off in this one. Should be able to see an exit into combustion chambers
 
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Old Aug 31, 2010 | 04:01 PM
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I agree to that point. I've seen blind holes for dual plugs before. They just weren't finished to give a race option.
 
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