TimeSert head stud inserts

[M3TURBO]

Wonder if anyone has had experience with TimeSert or thread inserts for head stud holes with the 1UZ? or any high boosted alloy block, good idea or not?

Mixed reports on the web, can't find any comments in this forum search.

For example could they be used on and engine build to increase the stud hole strength and stud pull out resistance when going with high stud torque down specs for reliable daily high boost?

Read up sounds good, you would get a bigger bite into the block aluminum with a slightly larger major thread diameter and a steel thread face for the ARP studs to bear against.

(I also have a few suspect stud hole threads on my current block in any case and these would save me throwing the block.)

I am looking at them for 7/16" ARP's using 1.5" long insert's, the ARP studs actually only take up 1" of thread.

And also possibly looking at them for 1/2" studs too.

I am considering the 5.2L stroker alloy block and surely head stud integrity will be even more of an issue.

 

[Zuffen]

As an old Porsche owner we were used to Timeseting the blocks when the head studs pulled out.

It was the only way of saving the block when this happened.

I wouldn't bother timeserting a 1UZ rather I would move up to the next size up in head studs which would give greater holding power on new threads.

 

[cribbj]

I was going to make the same comment as Zuffen, and would recommend you just go to 12mm studs. One of my blocks was rethreaded from 10mm to 7/16" and IMO, there's just not enough material left afterward to hold a critical service such as a head stud.

Better to drill the holes out and then run a proper size tap in them.

At the same time you drill the holes out, you can also deepen them. There's plenty of block material there, and IIRC, we increased the depth to nearly 1.5" when we went to the 12mm studs.

 

[M3TURBO]

Thanks for the feedback, good, so it actually does look like TimeSerts is a feasible option. I am going to give them a try on my existing tapped 7/16" block. Then I will go with the 1/2" ARP's on my spare - currently 10mm block.