re. Broken exhaust manifold studs
bswann at worldnet.att.net
Thu Mar 28 09:40:52 EST 2002
OK - I just got though with this on the 5ktqa and again 9 moths ago on NG
1) DON'T use an easy out/screw extractor of any sort. No matter how good
they sound, they will snap like butter, compounding your extraction effort.
2) If you can find one, us a reverse out(left hand) drillbit. Start with a
smaller size like 1/8' then graduate to larger size 1/4". This will
sometimes catch and extract the stud while you are drilling so you won't
have to -
3) Heli-Coil/Thread-Sert the hole. Buy a kit, comes with tap. Drill the
hole as in (2) or if you don't want to pay the $$$$ for revers out bits
then just use colbalt or titanium tipped bits.
Be careful, as the drill bits can snap off too as in (1).
I also used a mig welder once to weld the borken stud to the part in the
head - that worked well, but the last head, they had all broken off about
1/4" inside -PITA x10.
[Three exhaust manifold studs snapped today while removing the (_very_
cracked) exhaust manifold on my '90 200TQ20v. The parts sitting there
extends 15 to 25 mm from the head.
How do I remove them? I don't want to attempt this myself before
asking you all on the list! :-)
BTW, should all the studs be replaced while I'm in there?
'90 Audi 200TQ 20v]
More information about the 200q20v