Pictures of the Bigsert installation are above.
If the CR500 big end is M10 x 1.25 and a 9.77 x 1.25 hole has already been pulled out, how would you install the stud? That's like .010" deep threads.
head stud pulling out
- Thread starter tumblingtwerp9
- Start date
Pictures of the Bigsert installation are above.
If the CR500 big end is M10 x 1.25 and a 9.77 x 1.25 hole has already been pulled out, how would you install the stud? That's like .010" deep threads.
Video's are always a plus, I never fail to learn from your video's. Can you do it with a hole that's been repaired and striped back out, like the one tumblingtwerp9 has got? What size drill and tap do you use for the CR500 studs?
I fear that it is not, but I hope that this comment is toward the original poster (the one we're on this thread to help).
I can't speak for tumblingtwerp on whether he'd like to see a video or not. I don't really have an opinion on it, because I wouldn't use the CR500 head stud either way.
because i'm a bumbling idiot, just like to disagree with a master like ken, and already wasted $ on a timecert kit, so why do it for under $5 .......duh
oh, and my wife wilda likes cookie cakes
As to the concern about being able to torque a factory head stud, I've read the service manual front to back and nowhere in there did I see a specification or recommendation about the head stud torque spec. I've also never seen factory head studs run all the way down into the "center section". There is always about 1 thread sticking up above the mounting surface before the "center section" hits the deck height.
Tumblingtwerp, your options are numerous. What do you think the cause of the helicoil failure was? Why did it only pull 3 threads? Stud too short?
Did we ever get a resolution on this? Did you install another helicoil? Install a Bigsert? Figure out how to install a CR500 stud?
Ken, I never saw that video. Did I miss the link?
Ken, I never saw that video. Did I miss the link?
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alright I don't think my helicoil originally failed because when I pulled the stud out the threads were screwed up like the stud was what had pulled out due to not being torqued properly to begin with.
I am currently waiting on a longer helicoil since I ran out of the ones I had on hand and figured I could try a longer one so it would grab more threads. I got a new blaster head stud and will install it with the helicoil and pray that it holds.
If it pulls out again I will attempt to tap for a cr500 head stud before just throwing a bigsert in since the cr500 head stud will use the same hole as the helicoil and be smaller than a bigsert hence giving me more opportunities for something to hold before my last resort of a bigsert.
I am currently waiting on a longer helicoil since I ran out of the ones I had on hand and figured I could try a longer one so it would grab more threads. I got a new blaster head stud and will install it with the helicoil and pray that it holds.
If it pulls out again I will attempt to tap for a cr500 head stud before just throwing a bigsert in since the cr500 head stud will use the same hole as the helicoil and be smaller than a bigsert hence giving me more opportunities for something to hold before my last resort of a bigsert.
Ken, how much do you charge for the CR500 stud modification? I have a fleabay cylinder I've been cleaning up and the holes are either stripped, marginal or heli-coiled. The exhaust flange is stripped too, what is the trick there?
Also there is what looks to be a casting flaw on the gasket surface but it could be a tool mark. Should I worry about this sealing and if so is there a fix?
Sorry the pic is terrible, the groove isn't super deep or wide but you can definitely see it and feel it when you run your fingernail across it
Also there is what looks to be a casting flaw on the gasket surface but it could be a tool mark. Should I worry about this sealing and if so is there a fix?
Sorry the pic is terrible, the groove isn't super deep or wide but you can definitely see it and feel it when you run your fingernail across it
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Well this happened again....forward head stud pulled out slightly while riding and blew a headgasket. No idea why this one went because they were torqued to spec and retorqued after heat cycles. I am installing a cr500 head stud on this one. So far my rear one is holding up with the new helicoil.
Can you do a how-to video of the stud installation? I got my exhaust flange hel-coiled and I have some cr 500 studs on order, the only thing I haven't figured out is if I need to cut a recess for the flange of the stud to fit in to or if it just sits flush with the top of the cylinder.
Well got the forward stud patched up with a cr500 stud in it. Went to tighten down the head to 20 ft/lbs and ripped another stud out...so I have decided to pull them all and install cr500 studs because from what I can tell the PO jb welded (or something similar) all the studs in because i can pick the threads out with a pick.
Thanks for that video ken. I am also needing to do this. Anyone have a link to some cr500 studs. I can find them myself but does a supporter on here sell them or maybe ken, just like to give my money to you guys first. lol
Wow, this is an old post. I just read it again and just about pissed myself. I can get the studs for you. Give me a call on Friday.
I remember this post too! Wow...why was it so hard to understand for everybody? Especially for that civicdude freak.
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