installing timeserts myself

[BMB]

i am thinking of installing timeserts on my own. spoke to the guy at timesert fasteners and he said it was real easy.they sell the whole kit for around $100. anyone done it themselves? how easy.how many horror stories. thanx

[Britwrench]

First of all, what are you installing them on and where?

[BMB]

76 2.7 CYLINDER HEAD STUDS (24)

[BMB]

THE ENGINE IS OUT AND STRIPPED TO CASES. the cases are still together

[This message has been edited by BMB (edited 11-05-2001).]

[Britwrench]

If you have a 2.7 with stripped threads in the case you will NEED to have the case machined. Installing the timeserts is pointless without other machining.

[Jdub]

If you are set up with a drill press and a method to exactly replicate a perfectly square-to-case hole at the perfect depth in your mag. case for every stud you intend to 'cert than go for it.

Otherwise, stay well, well away from this procedure unless you have an extra mag. case around. Those studs must be near-perfect in height and angle-to-case/cylinder or you will soon feel the wrath of stud sidetension. Alternative is to have a pro. perform the drilling procedure if you are fluent in everything else.

Finally, do not spend any money on the case until you have successfully finished 'certing the case. If you fail, that money would have been wasted.

Jw

[Jim Sims]

To do a quality job one needs a milling machine and the proper tooling. To do this correctly one has to get 24 thread inserts (Timeserts) installed normal to the cylinder mounting surfaces; IMO there is no way to do this manually. It will be real easy to ruin the case trying to do this with a handheld drill. The magnesium is so soft that an existing hole is a poor machining guide for even drilling itself out for the timesert tap. In addition there is a 8 mm interior stud which should also be timeserted; plus the main bearing bores should be checked. These 2.7 magnesium cases warp. I strongly recommend splitting the case and taking this job to a machine shop that has Porsche experience with these types of repairs. Jim

[Jim Sims]

To do a quality job one needs a milling machine and the proper tooling. To do this correctly one has to get 24 thread inserts (Timeserts) installed normal to the cylinder mounting surfaces; IMO there is no way to do this manually. It will be real easy to ruin the case trying to do this with a handheld drill. The magnesium is so soft that an existing hole is a poor machining guide for even drilling itself out for the timesert tap. In addition there is a 8 mm interior stud which should also be timeserted; plus the main bearing bores should be checked. These 2.7 magnesium cases warp. I strongly recommend splitting the case and taking this job to a machine shop that has Porsche experience with these types of repairs. Jim

[Britwrench]

Machining 2.7 crankcases can be done by several shops through the US. Usually it follows;

Line bore the main bearing bores.

Install the cylinder stud timeserts and
the through crankcase 8mm stud.

Machine the deck height

Machine the cylinder bores round.

You WILL need this work.

Note that if the studs have been loose for a while the head face may need machining which can be done when the new valve guides are installed.


We charge about $550-600 for the case machining.