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10-16-2020, 10:41 AM | #1 |
1965 Chevy C10, 2005 4.8L/4l60
Join Date: Aug 2004
Location: DFW Texas
Posts: 8,546
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Drill and tap the head for stock 65 temp sender?
Anyone did this? Info please
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10-16-2020, 12:06 PM | #2 |
Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,670
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Re: Drill and tap the head for stock 65 temp sender?
Yep...I've done that to all mine...I've done both 3/8 & 1/2 npt...
3/8 npt was for a elec sender ,,the 1/2 npt was for a mech sender... I'm not sure what size your 65 has... i drill and tap the pass side head at the rear I remove the plug that's there...I've done them in the truck, but prefer to do it on a engine stand...that way i can tilt the engine at a angle...after drilling i take a shop vac and stick over the hole to suck out any stray shavings...then on the tap i put grease in the flutes to catch the tap shavings...
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
10-16-2020, 09:26 PM | #3 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: Drill and tap the head for stock 65 temp sender?
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10-16-2020, 11:08 PM | #4 |
Post Whore
Join Date: May 2015
Location: Alabama
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Re: Drill and tap the head for stock 65 temp sender?
I looked for that post Capt... and couldn't find it...
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
10-17-2020, 09:26 PM | #5 | |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: Drill and tap the head for stock 65 temp sender?
Quote:
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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10-19-2020, 08:15 PM | #6 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: Drill and tap the head for stock 65 temp sender?
So the LS heads have a hole smaller than 3/8" NPT?
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
10-19-2020, 09:31 PM | #7 |
Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,132
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Re: Drill and tap the head for stock 65 temp sender?
Yeah it is smaller. If you are running aftermarket gauges like Autometer they can supply a brass adapter that screws in the stock LS port on the cylinder head. Works well.
On some my older LS swaps I did drill and tap the head. The only thing I would add to above is put some grease on the drill bit to catch the drill shavings. Also as you tap the new drilled hole, tap it a bit and check with the sensor if it's deep enough. Kind of sneak up on the depth of the threads since it's pipe threads. |
10-20-2020, 07:15 AM | #8 |
Senior Member
Join Date: Nov 2013
Location: East Tennessee
Posts: 2,199
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Re: Drill and tap the head for stock 65 temp sender?
I have been doing the modification of the factory sender for the 67-72
The stock sender is ½-NPT and there is enough material to turn and thread it to ⅜-NPT Unfortunately the LS style sender is 12mm and there just isn't material enough to machine it down that small Here is a cut away of the stock sender
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10-25-2020, 07:28 PM | #9 |
Senior Member
Join Date: Dec 1999
Location: TX
Posts: 1,624
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Re: Drill and tap the head for stock 65 temp sender?
I'm a little late getting here but has anyone tried the Classic Instruments SN12MM
It's supposed to be a 12mm sender that will work with older gauges. |
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