 Is my case shot? |
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| Cevan |
 Jan 4 2010, 07:47 PM
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#1
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Senior Member  Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351  |
So after I had removed all the head studs from the case, I noticed a couple had come out real hard, as if something was wrong with the threads. After cleaning the threads of the stud, I couldn't thread them back in the two suspect holes.
I got a 12mmx 1.5tap and chased those holes. Now, the head studs go right in and they wiggle!! Even after I bottom them out, they can be moved relative to where they exit the case. Is the case shot? What did I do wrong? |
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| Jake Raby |
Jan 5 2010, 09:55 AM
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#2
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
You should have used a thread chaser, not a tap. The chase has much shallower roots and doesn't create this issue.
Now that it has occurred you can drill the case 2mm over size and install a time-sert. Thats your best bet for something thats fairly easy to do and inexpensive. |
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| Cevan |
Jan 5 2010, 01:50 PM
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#3
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
QUOTE(Jake Raby @ Jan 5 2010, 10:55 AM)  You should have used a thread chaser, not a tap. The chase has much shallower roots and doesn't create this issue. Now that it has occurred you can drill the case 2mm over size and install a time-sert. Thats your best bet for something thats fairly easy to do and inexpensive. I hope others learn from my mistake. I contacted my local Time Sert dealer and the kit plus the correct size inserts is a little over $100. Do I need to have a machine shop drill and tap the holes in order to keep everything square or is this something I can hand drill and tap? |
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| brp986s |
Jan 5 2010, 03:40 PM
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#4
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Member Group: Members Posts: 434 Joined: 27-September 07 From: los angeles Member No.: 8,167 |
Definitely have a shop do it, and a good one at that. I had a case messed up by some hack where the studs ended up pointing every which way like some bucktoothed hillbilly. The studs need to be square or it will confound your torque values. It would be a bummer to blow $100 on inserts then toss the case.
QUOTE(Cevan @ Jan 5 2010, 11:50 AM) QUOTE(Jake Raby @ Jan 5 2010, 10:55 AM) You should have used a thread chaser, not a tap. The chase has much shallower roots and doesn't create this issue. Now that it has occurred you can drill the case 2mm over size and install a time-sert. Thats your best bet for something thats fairly easy to do and inexpensive. I hope others learn from my mistake. I contacted my local Time Sert dealer and the kit plus the correct size inserts is a little over $100. Do I need to have a machine shop drill and tap the holes in order to keep everything square or is this something I can hand drill and tap? |
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Posts in this topic
Cevan Is my case shot? Jan 4 2010, 07:47 PM
bam914 They should thread in tight like that. The only t... Jan 4 2010, 08:07 PM
Van
They should thread in tight like that. The only ... Jan 5 2010, 08:06 AM Cevan
They should thread in tight like that. The only... Jan 5 2010, 09:12 AM Cap'n Krusty A standard tap, the one everybody has, is NOT mean... Jan 4 2010, 08:51 PM Cevan Seeing as I screwed up only one of the case halves... Jan 4 2010, 09:42 PM bdstone914
Seeing as I screwed up only one of the case halve... Jan 4 2010, 10:05 PM kwales While you were cleaning the studs, did you notice ... Jan 4 2010, 10:36 PM Mark Henry And NO to using two different case halves. They ar... Jan 4 2010, 10:41 PM sww914 Take it to a machine shop and have them fix it. It... Jan 4 2010, 10:58 PM Cevan Thanks for the replies. Looking back on what I di... Jan 5 2010, 07:10 AM Rand My bad - I was thinking exhaust studs. Disregard
... Jan 5 2010, 09:45 AM r_towle
You should have used a thread chaser, not a tap.... Jan 5 2010, 04:52 PM underthetire :agree:
Just make sure your table is square to th... Jan 5 2010, 04:54 PM kwales Most drill presses aren't an option....
That ... Jan 5 2010, 06:27 PM r_towle A drill press with a large top bolted in place wil... Jan 5 2010, 08:05 PM Dr Evil Thanks for posting this mistake. I have done simil... Jan 5 2010, 08:14 PM jmill
While you might be tempted to spend all your mone... Jan 5 2010, 09:30 PM Cevan Is a thread locker required when reinstalling the ... Jan 6 2010, 09:15 AM underthetire http://www.mcmaster.com/#inch/metric-threa...inser... Jan 6 2010, 11:24 AM Vacca Rabite Before you go and spend $100 on the TimeCert ... Jan 6 2010, 02:12 PM Cevan
Before you go and spend $100 on the TimeCert... Jan 6 2010, 02:30 PM underthetire
Before you go and spend $100 on the TimeCer... Jan 6 2010, 02:43 PM Cevan I'm getting a headache. :D
I think I'll ... Jan 6 2010, 02:47 PM ME733 :popcorn: Just out of curosity, why did you remov... Jan 6 2010, 06:39 PM r_towle Brockton, Dedham and Newburyport.
There are other... Jan 6 2010, 08:52 PM |
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