N/A Head on TD ?

[hillfolk'r]

ifound na and turbo prechambers different sizes,,turbo is bigger chamber,,i think somewhere it mentions something like na is 30mm turbo is 32mm,and thats the part you see when its in the head,,i did a comparo side by side,they are different,,, once tried cutting a exhaust valve from a td,and it didnt bubble in water,not sodium filled like theysay,,,,,ive ran na's as turbo setups,,gotten a few years out of them too,depends on how much fuel you put to it,,,,and i cant find new "turbo" prechambers either,,i thought someone modded some gm 6.5 prechambers or something,,anyone know a source for new prechambers?

[fspGTD]

Do you remember which types of heads you measured, as I don't believe that solid lifter heads have the same prechambers as hydraulic lifter heads.  (Mark Malone has documented different size prechambers comparing a 1.6lNA solid lifter head versus a 1.6lTD hydraulic lifter head here: http://www.vwdiesel.net/phpBB/viewtopic.php?t=2329&start=35 )

I just remember that I have a 1.6lTD solid lifter head in my garage off the engine, and was going to measure the OD of one of the prechamber faces.  I'll do that and will report back here.

[Kudagra]

how do you get the prechambers out?

[Fisher]

The Diesel Head shop that did my TD Head installed Cast Iron Valve Guides.  Work better for the heat.

[tylernt]

how do you get the prechambers out?

Stick a stout wooden dowel in where the injector goes and hammer them out.

[fspGTD]

I measured the prechamber face diameter on the 1.6lTD solid lifter head today, and it matched the 32mm of the 1.6lNA solid lifter prechamber reported by Mark Malone.