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Broken rocker arm bolt

Wsmccoy

Wsmccoy

New member
So as the title says I have a broke rocker arm bolt. I put on 105 lb valve springs a week ago and while driving home from work I heard a ticking noise, I know I should of pulled over and inspected it or got it towed home, but when I was a couple blocks from home it got louder and the check engine light came on. I scanned as I was pulling in the driveway and had a misfire code for cylinder 3. Took the valve cover off and found the bolt broke.

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I know it's hard to tell with the pedestal still on but I can tell it's flush with the head. So what are the chances that an extractor could get it out? And just to add I replaced the bolts and torqued everything down just as I did when I installed the 1.9 modified rockers months ago. Is there a possible chance it was a weak bolt? All other bolts are still torqued correctly and not loose.


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I went through the same issues ... We tried extractor, we even tried welding a nut to the broken stud to back it out... Ended up having to drill it out.
 


I already new it is going to be a pain, well I guess I'll know what I'll be doing this weekend instead of tuning for the 60lb injectors I have laying in the garage. And I thought I ordered comp cam bolts but when they arrived it was oem bolts. I thought they would be fine. I already placed an order for comp cam bolts though


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Iceman6669 said:
Your not going to want to hear this but you will prolly be best off if you take the head off the car.
Click to expand...

That's what I was wanting to avoid. I'm going to go ahead and try with it on and see what happens. Worst case I'll take it off


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Go buy a left hand drill bit. Heat the head around the bolt (not the bolt)
You might get lucky and it'll back out.

If not then buy a masonry drill and have fun. The masonry drill has a high speed carbide tip that will drill case hardened steel. It will drill through that bolt with no issues.

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If there isn't loctite on the threads and the bolt isn't bottomed out in the hole you should be able to back it out. I use a vibrating engraving pencil to spin broken bolts out. Left hand drills work good to.

I used grade 8 socket head cap screws.
 
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