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Re: GM block heater
Quote:
Originally Posted by Accelo
The metal part with the "O" ring is 1.445
The OD of the "O" ring is 1.64"
It has to fit a 1.5" soft plug.
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Thank you for checking. I checked my freeze plug and it's 1.75" so it won't fit.
Great NOS part, good luck with the sale.
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John
'91 Blazer, full top, bbc, 4spd, Doubler, 1 tons, 40's
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