aircraft engineer Posted February 9, 2008 Share Posted February 9, 2008 What I'm looking for is the bolt threads for taking off the brake disc/drums 7x1 7x1.5? hole measures 6.8 with my caliper so it's 7 major dia. Quote Link to comment Share on other sites More sharing options...
aircraft engineer Posted February 9, 2008 Author Share Posted February 9, 2008 yes, I see the FAQ thread - not there (it's a bolt size question I posted separately) Quote Link to comment Share on other sites More sharing options...
Gloyale Posted February 9, 2008 Share Posted February 9, 2008 What model? Year? As far a I know, Subaru does not use any M7 bolts. All the fasteners I've encountered are M5x1.0, M6x1.25, M8x1.25 or 1.5, M10x1.25 or 1.5, M11*x1.25, and M12x 1.5. *= Old EA82 engine cylinder head bolts. Never seen this size anywhere else Quote Link to comment Share on other sites More sharing options...
Skip Posted February 9, 2008 Share Posted February 9, 2008 G, I believe he is asking for what some refer to as "jacking bolts" Thanks to porcupine 73 for the excellent picture Quote Link to comment Share on other sites More sharing options...
Gloyale Posted February 9, 2008 Share Posted February 9, 2008 Looks like M8 to me. I've never seen an M7 bolt. Quote Link to comment Share on other sites More sharing options...
aircraft engineer Posted February 9, 2008 Author Share Posted February 9, 2008 97 Impreza (drum) 98 Forester (disc) I'm just going to have to drag the Forester hub down to the hardware and play "test the bolt" and then hope the Impreza has the same bolt hole (doing hub swap to avoid changing bearings) caliper measurement was 6.8 - guessed 7 but might be 8 after all (since 7 is rare, but you never know if they put proprietary things on some vehicles to make it difficult to do "ordinary" work) - depends on thread depth since the caliper measured the "minor" of the bolt, but I hoped someone would "know". Once I find out, I'll post it... somewhere Quote Link to comment Share on other sites More sharing options...
aircraft engineer Posted February 9, 2008 Author Share Posted February 9, 2008 OK - I'll buy "8" but what's the THREAD? Quote Link to comment Share on other sites More sharing options...
Gloyale Posted February 9, 2008 Share Posted February 9, 2008 I just use a 3 jawed puller. Quote Link to comment Share on other sites More sharing options...
aircraft engineer Posted February 9, 2008 Author Share Posted February 9, 2008 no access for 3 jaw on a ROTOR. use the 2 bolts - lots easier than doing the 3 jaw 8X1.25 use about 40mm long or so (fully threaded) anybody need some 98 Forester stuff - rotor, backing plate, e-brake, ABS pulse ring... it's junk to me (Impreza is DRUM) Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted February 9, 2008 Share Posted February 9, 2008 Hello. If it's the OEM rotors/drums, it is M8. I always forget the thread spacing; it's whatever is 'standard' in that size. I believe it is 1.25mm or it might have been 1.5mm Quote Link to comment Share on other sites More sharing options...
aircraft engineer Posted February 9, 2008 Author Share Posted February 9, 2008 factory Forester - 8X1.25 - I got it off - now to just pop the hub out of the housing... (press time, I have a 12 ton - just have to contend with the hub dia on the back inside of the housing - looks like a 1-1/16 socket will make it thru - it has to fit thru the bearing inner dia but contact the hub dia.) Dang, this is a lot of work (need icon for "wiping sweat from brow") just to save $50 Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted February 9, 2008 Share Posted February 9, 2008 Dang, this is a lot of work (need icon for "wiping sweat from brow") just to save $50 hahaha as my dad would say "yes but you have the pride of doing it yourself". He grew up during the depression. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted February 9, 2008 Share Posted February 9, 2008 phew! Quote Link to comment Share on other sites More sharing options...
brus brother Posted February 9, 2008 Share Posted February 9, 2008 hahaha as my dad would say "yes but you have the pride of doing it yourself". He grew up during the depression. or braking it yourself... Quote Link to comment Share on other sites More sharing options...
Gloyale Posted February 10, 2008 Share Posted February 10, 2008 no access for 3 jaw on a ROTOR. use the 2 bolts - lots easier than doing the 3 jaw 8X1.25 use about 40mm long or so (fully threaded) anybody need some 98 Forester stuff - rotor, backing plate, e-brake, ABS pulse ring... it's junk to me (Impreza is DRUM) You need a bigger three jawed puller;) I also wonder why not swap to disc while you where at it??? You''re doing some serious work to maintain drums. Quote Link to comment Share on other sites More sharing options...
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