May 5, 2016, 06:14 PM
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Z28 LS1 Radiator Replacement - extra fitting!
Ah - You kept your old outlet. Life would be a whole lot better for everyone if GM kept with the 2 piece thermostats and housings... Not sure why they started making them a single unit.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
So, the old TS/housing does not fit in the newer pumps, but the new TS/housing fits in the older pumps, is this correct...?
old TS/housing = TS locks into housing wings
new TS/housing = two pieces
old TS/housing = TS locks into housing wings
new TS/housing = two pieces
My original factory housing was a two piece and the new ones have all been one pieces. My understanding is that all the new GM thermostats are the one piece design.
Thread Starter
Teching In
Joined: Jul 2011
Posts: 12
Likes: 0
You are correct, i couldn't get the new design (2 pieces) to fit in the old housing. Can't remember exactly why it didn't fit now, but it wouldn't have worked that I could tell. Just went and bought one for a 2004 GTO, the part number is listed on the first page of the thread, good luck!!
