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Electronicals / Forscan Expert
Joined: Fri Nov 24th, 2017
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They both have their usages. I have never heard the term "timesert" I know them as "Keenserts". The biggest place helicoils are a no nos in applications where the hole is WAY worn, outside the drill size for the helicoil. There is another kind of insert like a keensert that has no tines (maybe it is supposed to be a "tinesert"?) that some german manufacturers use to make threads stronger in aluminum. No tines means they can effectively be removed and replaced.
The advantages of Keenserts and the german style is they use standard tap sizes for the insert. One might think this isn't a big deal but when you only have one helicoil tap and some butt plug has borrowed it thinking it was a regular tap dulling the living crap out of it without your knowledge... then you have a project that has to go out...
A dull helicoil tap can produce a situation where the helicoil can be inserted but the end result thread is too small and the bolt gets bound up.
Been a machinist since early 80's I've endured all of this multiple times.
Because helicoil taps are a special grind they are not produced in the masses that regular taps are. They are often weaker and harder to obtain.
So both have their uses. A helicoil tapped wrong or inserted wrong or if the coil is too long or too short for the hole can be a big problem. Keenserts are no brainers but there is often not enough room to drill the larger hole required for them.
Good info.
Update on progress:
Well the wife works 3 nights a week and that leaves me with 4 kids to watch after (1, 4,6, and 8). So this has pushed me back a little on putting it back together.
I got the timing belt back on this weekened. I remember timing it being a pain but this time I think i found the trick. When checking the indicators I found it easier to line up the oil and cam sprocket first and seeing how the crankshaft sprocket sits. If you try to line the crank one up and check the other two it always seems to be off. One way is just more sensitive than the other. Hope this makes sense.
With a "new" head you have to install the camshaft seal. Started out being a pain because you tap one side in and the other side wants to pop out. Look around for something that had a bore similar to the camshaft and voila! That good old trust throttle body spacer was close enough to work. Just put a piece of steel bar with a hole in the middle across it and used the camshaft sprocket bolt to pull it in. Seated the seal perfectly.
Intake, exhaust, and misc will hopefully be done this weekend.
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2000 XLT 2.5L A/T 2WD
Mods:
Power Windows/Locks Mirrors using OEM harness and parts
Explorer Sportrac White Face Cluster
Explorer OHC and Auto-dim Mirror
Auto Door Locks
Full HID Projector Retrofit