IneedAmotor Posted September 13, 2012 Share Posted September 13, 2012 the bolts that hold My thermostat housing to the head have snapped. (77 280z with L28). I know that i can slide the housing off then slowly remove the bolts but i was wondering if there was any way that i could use the same length bolts that are fully threaded in place of the snapped ones? Also what are the lenghts so i will know how short to cut them? Any comments are appreciated greatly Quote Link to comment Share on other sites More sharing options...
z240 Posted September 14, 2012 Share Posted September 14, 2012 No worries about bolts that fully threaded. They do the same thing. As for length, you could just measure the thickness of the thermostat housing with a ruler at the two bolt holes, and add 5/8 inch for thread length into the block. That's 2 bolt diameters additional length (8mm x 2 = 16mm =~ 5/8 inch.) which is about what you need for good grip in the head. The bolts are 8mm x 1.25 thread pitch if your wondering that too. Happy bolt shopping! Quote Link to comment Share on other sites More sharing options...
IneedAmotor Posted September 15, 2012 Author Share Posted September 15, 2012 No worries about bolts that fully threaded. They do the same thing. As for length, you could just measure the thickness of the thermostat housing with a ruler at the two bolt holes, and add 5/8 inch for thread length into the block. That's 2 bolt diameters additional length (8mm x 2 = 16mm =~ 5/8 inch.) which is about what you need for good grip in the head. The bolts are 8mm x 1.25 thread pitch if your wondering that too. Happy bolt shopping! Thanks! helped a ton Quote Link to comment Share on other sites More sharing options...
Gavin Posted September 15, 2012 Share Posted September 15, 2012 Sounds like your all set, but I switched to studs on the housing. Easier on the aluminum threads, and easier to line up during installation. Quote Link to comment Share on other sites More sharing options...
IneedAmotor Posted September 15, 2012 Author Share Posted September 15, 2012 Sounds like your all set, but I switched to studs on the housing. Easier on the aluminum threads, and easier to line up during installation. by studs do you mean a long threaded peice and a nut that id removed from it insead of removing the entire peice? Just want to be 100% sure before i do this Quote Link to comment Share on other sites More sharing options...
zohanisback Posted September 23, 2012 Share Posted September 23, 2012 Correct. Once placed, they stay in and you reduce risk of stripping the head threads out. Here is a youtube video which helps show the procedure for installing a stud: Quote Link to comment Share on other sites More sharing options...
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