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Thermister on 95 heads for turbo
Posted by: bmarsh52 ()
Date: November 05, 2020 02:32PM

I am converting my 65 turbo to 95 heads.

The boss for the head temp sensor is not deep enough for the thermister.
Can it be drilled deeper for the thermister and an adapter be used for the threads?

thanks

Reston, Virginia

1965 Corsa Turbo Coupe

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Re: Thermister on 95 heads for turbo
Posted by: TerribleTed ()
Date: November 05, 2020 02:42PM

Clark's sells an adapter. I do not remember if drilling is needed to use it, but, I am sure some drilling would be OK.

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Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
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Re: Thermister on 95 heads for turbo
Posted by: 2ragtops ()
Date: November 05, 2020 02:49PM

Be very careful how deep you drill, you could easily ruin a head, by entering into a chamber or other area.

Bob Bauer

Show-Me Corvairs

1966 Monza Convert 140 P/G with A/C, plastic wheel with tele-column am-fm posi-traction
1966 Corsa Convert 180 wood wheel tele-column am-fm sport steering posi-traction
1965 Corsa Coupe Crown V8 temporarily red lined for repair
House Springs, Missouri

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Re: Thermister on 95 heads for turbo
Posted by: playerpage ()
Date: November 05, 2020 02:53PM

I used the adapter. I have a 95 head on the driver side. It seems reasonably accurate, with no drilling.

____________________________________________

Eric C. Player, Fargo, ND, USA
MEMBER: CORSA National, Central Coast CORSA, South Coast CORSA, Vintage CORSA, Sfba CORSA, and the San Joaquin Valley Corvair Club. Those may change. winking smiley
THEN:
1965 Monza 110, Canary Yellow
1965 Corsa 180 Turbo, Red
1966 Monza 110, Purple
1967 Monza 140, Red
1966 500 110, Black; nicknamed "Shadow"
1965 Monza 110, Camaro Yellow; nicknamed "Silver"
NOW:
1966 Corsa 180 Turbo, Blue; nicknamed "Bluvair"

"He cautioned me not to take notes. It would not have helped if I had, as he would start a paragraph with, 'It is therefore obvious. . .'
and go on from there to matters which may have been obvious to him and God but to no one else."
-- Robert A. Heinlein, character of Daniel B. Davis, 'The Door Into Summer.'

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Re: Thermister on 95 heads for turbo
Posted by: thewolfe ()
Date: November 05, 2020 02:58PM

Don't try to drill it. The turbo heads have a taller boss to accommodate the thermistor and the threads are different. Get the adapter from Clark's, no other modification necessary. Just be careful not to torque the adapter too much. They break pretty easily.

Nate Wolfe
Portland OR
65 Corsa 180

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Re: Thermister on 95 heads for turbo
Posted by: jjohnsonjo ()
Date: November 05, 2020 03:01PM

John Sweet has the adapters as well, or did. I like to spread some of my Vair $$$ to all vandors.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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Re: Thermister on 95 heads for turbo
Posted by: bmarsh52 ()
Date: November 05, 2020 03:38PM

Thanks for the quick reply everyone.

How about the Head Temperature sender on the other side. My head is a coarse thread and the replacements are fine threads. Is there an adapter for this on also?

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Re: Thermister on 95 heads for turbo
Posted by: jjohnsonjo ()
Date: November 05, 2020 03:59PM

I have re-tapped the hole or used the a die on the sender and it works fine for me. There is no real strength needed , you are holding a light weight sender in place. You can also just use the wrong sender, the worst that will happen is you will get an earlier warning.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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Re: Thermister on 95 heads for turbo
Posted by: 66vairman ()
Date: November 05, 2020 04:09PM

bmarsh52 Wrote:
-------------------------------------------------------
> Thanks for the quick reply everyone.
>
> How about the Head Temperature sender on the other side. My head is a coarse thread and the replacements are fine threads. Is there an adapter for this on also?

You can use the temp sender for the 95HP head. It will turn on the "TEMP" warning light at a lower temperature vs. the sender (with the different threads) used on Turbo and 140HP heads. That might be a good thing.

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Re: Thermister on 95 heads for turbo
Posted by: Wagon Master ()
Date: November 05, 2020 04:10PM

You use the adapter on the driver side head for the thermistor and the stock 95 horsepower coarse thread temperature sender on the passenger side head.

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Re: Thermister on 95 heads for turbo
Posted by: Frank DuVal ()
Date: November 05, 2020 07:36PM

Quote
Wagon
You use the adapter on the driver side head for the thermistor and the stock 95 horsepower coarse thread temperature sender on the passenger side head.

Yes!

Frank DuVal

Fredericksburg, VA

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