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Why does the '98 (3 wire) Coolant Temp Sensor don't fit?

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Old 06-28-2011, 09:19 AM
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Default Why does the '98 (3 wire) Coolant Temp Sensor don't fit?

Ok guys I have 241 heads on my ls1 and am trying to put a '98 CTS on my cylinder head and the threading is just too big to go in. The AC Delco part # for it is 10096181 but that doesn't work. I told the parts guy at the dealer I needed one from a '98 f-body and this is what they gave me. I need the 3-wire sender so I can use it for other gauges. Anyways, has anybody came across this problem? Also, if you have a 3 prong connector and sensor, what is the part number that you have? Any help would be appreciated. Thanks!
Old 06-28-2011, 09:42 AM
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Originally Posted by tnmotown
Ok guys I have 241 heads on my ls1 and am trying to put a '98 CTS on my cylinder head and the threading is just too big to go in. The AC Delco part # for it is 10096181 but that doesn't work. I told the parts guy at the dealer I needed one from a '98 f-body and this is what they gave me. I need the 3-wire sender so I can use it for other gauges. Anyways, has anybody came across this problem? Also, if you have a 3 prong connector and sensor, what is the part number that you have? Any help would be appreciated. Thanks!
What? Your trying to put a CTS on your head?
Old 06-28-2011, 10:01 AM
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I had this same problem with my '98 a few months back, kept getting different sensors(at least 3 of them). What you're looking for is a temperature SENDER. I ended up using a Standard Part #TX111. An AIRTEX / WELLS Part #1T1081 should also cross over. Hope this helps.
Old 06-28-2011, 10:54 AM
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The '98 coolant temp sensor has a 3-prong which I can use the extra wire for my autometer gauges. The 99-up are only two prong. The sender i bought from the dealership the threading was too big and wouldn't fit in my cylinder head.

So that Airtex sensor has the 3-prong sender? I'll try calling around and see
Old 06-28-2011, 11:42 AM
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You can also try pipe adapters from a plumbing store or home repair store.
Old 06-28-2011, 12:21 PM
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Correct GM part # is 12551708.
Old 06-29-2011, 08:40 AM
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Originally Posted by 2xLS1
Correct GM part # is 12551708.
Correct!!! You also need to find a new parts place.. The # they sold you is for the 3.8 motor that fits in the lwr intake.
Old 06-29-2011, 09:07 AM
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That's exactly the part number I needed! Thanks guys.

I don't know why the parts guy gave me that #, I told him to look it up off a '98 camaro/firebird? Anyways gave him the new part # and will come in tomorrow



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