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Unhappy How do you repair a backed-out time-sert?

can't wait to get this puppy in there, got just one little problem

is there a tool/method to extract this? and then install a new one? or is it feasible to simply insert this back in?

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Old 02-10-2005, 02:55 PM
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that's the spark plug hole, btw

here's the whole beast:
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Old 02-10-2005, 02:58 PM
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gratuitous valve train shot, just because...




spec those adjusters...
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Old 02-10-2005, 02:59 PM
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everything you ever wanted to know about Time-serts

http://www.timesert.com/FAQ.html#5

the proper thing to do is remove it and replace with a new one...there is a good chance it was not installed correctly using the install tool, or that the hole was a little oversized.....


what happens when you screw a stud into it? it might just end up going back in and you might not have any problems
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'73 914, 1.7, with Boxster transmission in the future?
Old 02-10-2005, 03:04 PM
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thanks for the link, mike

put some good torque on the spark plug, thing wouldn't go back in. gonna take the EZ-out to it, we'll see....

n
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Old 02-10-2005, 04:15 PM
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are those swivel feet adjusters??
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Old 02-10-2005, 06:19 PM
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I think Snapon makes a tool specifically for doing spark plug inserts?
Old 02-10-2005, 06:59 PM
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No, those are the ford/mazda ball and socket type. same principle. they work well on type ones. sometimes tough to get the feeler guage under them.
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Old 02-10-2005, 07:09 PM
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yup, ball&socket type... i have no experience with them...

got the insert out w/ a spiral ez out.... directions on the new insert specify to thread it on the sparkplug with some loctite, let cure, then remove plug....

n
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Old 02-10-2005, 08:01 PM
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Are those abandoned parts?

KT
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Old 02-11-2005, 07:24 AM
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did you buy an install kit? what size? what material? want a free lunch??

i need access to a 14x1.5 time-sert kit (and some inserts )
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Old 02-11-2005, 07:43 AM
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Time-Serts are wonderful, I've been installing them for years.

If the time-sert is longer than 15mm it will stick out in the chamber of a 2.0 914 head such that the last two threads, which are swedged out by the burnishing tap, don't dig into the head. This will allow the time-sert to back out until the swedged threads engage the head and lock it down, preventing it from coming out any further. I have seen a couple of occasions where a machine shop installed the longer time-serts (17mm is the length) then ground the excess off. This, ofcourse, removes the swedge threads and allows the insert to back out with out resistance.

Another mistake I've seen is the countersink operation is skipped or not completed properly. This causes the time-sert to stick out past the spark-plug washer's contact area. When this happens the plug is torqued against the time-sert instead of the head. When the plug is removed it backs the time-sert out with it, making a mess.

In most cases if the burnishing tap has been run through the time-sert, forcing it out with an ez-out will destroy the threads. You may be able to prevent this by dousing it with a good penetrating oil before twisting it out. The truth is, however, that there is a very good chance you will have to remove the head and have it repaired.

Time-serts don't come out if installed properly. I've installed hundreds over the years and only had one come out. And it was defective and did no damage to the head. (The last two swedge threads weren't formed at the factory. I look for that now!)

Going to a larger diameter insert will likely crack the thin area of the plug boss in the chamber. I have a head in my shop right now that had a 18mm O.D. insert installed. The plug boss was cracked and coming apart. I had to weld the whole thing shut and start over.
The plug threads are 14mm x 1.25
Good luck!
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Old 02-11-2005, 09:37 AM
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