When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
We're going to get some Timeserts made up and also have a custom thread tool thingy made. I spoke to someone here about the Keenserts but he wasn't so keen on them. They sell a product called Bigsert but they aren't Big enough for these studs. (End of word association puns now).
... Hope you get the Timeserts made up in Time Patrick!
I would recommend using roll-tap when threading the block for timeserts, not regular cutting tap. Roll tap makes much stronger thread by not cutting the aluminium but rather displacing it and making it more dense.
When I twin-plugged my 911 cylinder heads (total of 12 of them) I ordered M12x1.5 roll tap (used 12mm plugs as secondaries like Porsche factory did back in RSR days to leave more material in the head). It needs special drill too (for M12 it was 11.8mm iirc).
Also, 911 guys usually prefer Casesavers over Timeserts as these have more coarse thread (2mm pitch) on the outside to stick good in the magnesium case. These are pretty straight forward to have custom made, just pick proper material.
This was my block before timeserting, it looks like there is enough meat since the shop that did it had to make a custom beefier 'timesert' piece for this hole.
How do they set the bore diameter if the block is heated?
Torque plate is needed where threads start at the deck surface or in line with cylinder walls because when the bolts are torqued they pull the material and deform cylinders.
In this case, threads are under cylinders and do not deform them when torqued. Thats why factory procedure doesn't involve torque plate.
09-15-2015, 02:29 AM
