Midwst Posted July 17, 2005 Share Posted July 17, 2005 I wanted to check on the crank shaft pulley bolt size for a 91 Legacy. Is it 22mm? I need to buy a socket for it. Also, would it be okay to add blue medium strength loctite to the oil pump bolts?I don't want them backing out. Someone mentioned red locktite on the crankshaft pulley, with antiseize on the shaft. Will this cause any problems with future removal? Thanks. Quote Link to comment Share on other sites More sharing options...
Legacy777 Posted July 17, 2005 Share Posted July 17, 2005 Just use a very small amount of blue locktite on the oil pump screws. use blue on the crank pulley bolt as well, not red. Wouldn't recommend using anti-sieze though. Quote Link to comment Share on other sites More sharing options...
RallyKeith Posted July 17, 2005 Share Posted July 17, 2005 use blue on the crank pulley bolt as well, not red. Why not? I've been using red on my crank pulley bolts for years with no problems. I'm curious. Quote Link to comment Share on other sites More sharing options...
BigMattyD Posted July 18, 2005 Share Posted July 18, 2005 Yes, the crank bolt is 22mm. Red loctite is a stronger bond (you need heat and more force to break it loose.) Blue is a bit weaker, easier to break with hand tools.. That is my understanding of the loctite mystery. Matt Quote Link to comment Share on other sites More sharing options...
Legacy777 Posted July 19, 2005 Share Posted July 19, 2005 If you torque it to spec, what's the reasoning to using red so that's it's a real pain to get off later. Blue just adds a little extra security to help keep the bolt from coming loose. Quote Link to comment Share on other sites More sharing options...
Setright Posted July 20, 2005 Share Posted July 20, 2005 Red is to be used only bolts you have no intention of removing again. On a "service" item like the crank bolt, blue is the way to go. Stops it shaking lose, but will come off with a small extension on the wrench come cambelt-day. Quote Link to comment Share on other sites More sharing options...
kingbobdole Posted July 20, 2005 Share Posted July 20, 2005 I used Red locktite on my crank bolt... I had an issue with it hucking the pulley off every so often so I put red on it.... if I need to get it off its very simple... breaker bar on the crank, disable it from running, lean the breaker bar on the front support and hit the starter. BAM-O! its loose.. Quote Link to comment Share on other sites More sharing options...
DerFahrer Posted July 20, 2005 Share Posted July 20, 2005 Red is technically supposed to be heated to something in the neighborhood of 500º before it will let go. I don't use Loctite, I just torque it down super-extra-tight... Quote Link to comment Share on other sites More sharing options...
Setright Posted July 20, 2005 Share Posted July 20, 2005 Subylvr, that's not good practice. Over torquing can cause bolts to snap. Quote Link to comment Share on other sites More sharing options...
NOMAD327 Posted July 20, 2005 Share Posted July 20, 2005 All loctite thread sealer products are designed to break down at 200 degrees. The difference is ultimate holding strength, Blue is perfectly adequate for keeping a bolt from coming loose, that's what it's for. The intention is that bolts sealed with blue can be broken loose with a wrench, red is intended for bolts that are not likely to be removed again. With clean threads the red is capable of holding until the bolt breaks off unless it is heated to 200 first. Quote Link to comment Share on other sites More sharing options...
Midwst Posted July 20, 2005 Author Share Posted July 20, 2005 Well than, blue it is. I made the mistake of over tightening the crankshaft bolt on my 94 Geo Metro. Now I can't get it off!! I don't know if anyone else has run into this problem. Does some of the crank threads come off with it? Have I ruined the engine? I was trying to change the crankshaft seal. I had to put it back together and just let it drip...onto the belt. Quote Link to comment Share on other sites More sharing options...
DerFahrer Posted July 20, 2005 Share Posted July 20, 2005 Subylvr, that's not good practice. Over torquing can cause bolts to snap. Yes it can. But I'm sure most of us are not strong enough to break the crank bolt by hand . That's a pretty beefy bolt... Quote Link to comment Share on other sites More sharing options...
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