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Old 03-28-2023, 12:14 PM   #4
72SB
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Join Date: Apr 2022
Location: Moorpark, CA
Posts: 721
Re: Water pump/Thermostat Replacement Advice L6 250

I use Permatex "WP & T Stat" housing RTV (grey). Just a skim coat on gaskets, each side. For any bolts that do go into water jackets (IDK if any WP holes go into water jacket on the 250), use "thread sealer" (not RTV) which is typically white on bolt threads if they do go into water jacket
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