Doddy Posted August 14, 2012 Report Share Posted August 14, 2012 So I just put my new Modquad head on yesterday and I was trying to put the spark plugs in and it was extremely tight. I was wrenching pretty hard to get the plugs to tighten all the way down. I know I was putting at least 50 ftlbs of torque to thread these fuckers in and that just doesn't seem right to me. No I didn't cross thread them and it was on both sides, not just one. And before I get any questions about using the right plugs they are NGK B8ES plugs, and they were brand new out of the box. Has anyone else had issues with these domes before? I just don't want to fuck up anything on a fresh rebuild. Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted August 14, 2012 Report Share Posted August 14, 2012 theyve had a history of messing the threads up. ive had to chase alot of dome threads to fix the issue. at some point i talked to somone at modquad about it and the tight thread was to prevent the spark plug from backing out. Quote Link to comment Share on other sites More sharing options...
willardwright59 Posted August 14, 2012 Report Share Posted August 14, 2012 are the domes brand new? did you take the plugs back out and check your threads? i run a modquad head too, but i use pro design domes Quote Link to comment Share on other sites More sharing options...
Doddy Posted August 14, 2012 Author Report Share Posted August 14, 2012 Yeah they are brand new, and I put them in and took them out like three times. I'm going to have to do it a couple more times when I get home tonight so I can do a compression test prior to starting her up. Super tight to keep them from backing out? That's fucking retarded, I feel like I am having to torque them down way to tight. Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted August 14, 2012 Report Share Posted August 14, 2012 You are torqueing them too tight. Chase the threads before you mess them up Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted August 14, 2012 Report Share Posted August 14, 2012 Yeah they are brand new, and I put them in and took them out like three times. I'm going to have to do it a couple more times when I get home tonight so I can do a compression test prior to starting her up. Super tight to keep them from backing out? That's fucking retarded, I feel like I am having to torque them down way to tight. Mine was like that with my new chariot head. After a few plug changes they were good to go. Quote Link to comment Share on other sites More sharing options...
Doddy Posted August 14, 2012 Author Report Share Posted August 14, 2012 You are torqueing them too tight. Chase the threads before you mess them up What do you mean "Chase" the threads? You mean run a tap through them? If I have to tap the thread I need to pull the head back off. Can I re-use the O-rings that I have in there (the bike has not been fired up yet) or are they pretty much shot after being torqued down the first time? Quote Link to comment Share on other sites More sharing options...
beez33 Posted August 14, 2012 Report Share Posted August 14, 2012 Probably having problems because your a duck fan. Quote Link to comment Share on other sites More sharing options...
Doddy Posted August 14, 2012 Author Report Share Posted August 14, 2012 Probably having problems because your a duck fan. Must be it. I would respond in kind, but I have a feeling your teams record speaks for itself. Quote Link to comment Share on other sites More sharing options...
beez33 Posted August 14, 2012 Report Share Posted August 14, 2012 Must be it. I would respond in kind, but I have a feeling your teams record speaks for itself. I knew that was coming Haha. Good luck Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted August 14, 2012 Report Share Posted August 14, 2012 Pull the head, run a tap through them and put it back together. Your orings will be fine. Jared Quote Link to comment Share on other sites More sharing options...
willardwright59 Posted August 14, 2012 Report Share Posted August 14, 2012 i replace o rings when needed (broken or starting to split) otherwise, they are good to run bud! Quote Link to comment Share on other sites More sharing options...
Doddy Posted August 14, 2012 Author Report Share Posted August 14, 2012 Thanks for all the help guys. I will fix the problem tonight. Quote Link to comment Share on other sites More sharing options...
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