View Full Version : tech forum gone? head bolt problem, need help

03-01-2009, 06:35 AM
What happened to the B5 technical forum?
Oh well, for lack of a better place to ask this, here goes:

I've had real difficulties getting the right tool for the job of removing my head bolts. Car is 97 B5 A4 TQM with original 058 AEB...
- I researched, ordered, waited several days for delivery and finally tried an Assenmacher #10 Polydrive -too big, no fit[evilmad]
After a weekend, the tool dealer emailed confirmation that a #9 Polydrive was definitely the right size (as confirmed by numerous professionals & Assenmacher themselves. another week goes by, the #9 shows up, and again, NO FIT [headbang]
The tool dealer threw in the towel and provided return shipping labels and will (allegedly) be providing full refunds -parts and shipping. Great, but I still don't know what the correct tool is, or where to get one (it is NOT triple square, I have a full set of internal 12pt "triple square" bits, and they aren't even close)

Yesterday, I wasted nearly 4 hours looking for a set of deep reach torx and metric hex set, and finally found a set of each at a new auto parts store chain called Bennett's.
The T50 was close enough that I was able to break the head bolts loose and remove the head, however it did NOT fit right. too much slop. In fact, so much slop, that I'm quite surprised that I didn't strip anything out!

Can anyone tell me what I need to use here, what are my head bolts SUPPOSED to be, do I have aftermarket bolts?
-POLYDRIVE 9 and 10 are too big
-T50 got it done but is really too small (sloppy loose fit)
The head bolts are the correct thread, diameter, pitch, length, but don't look like the pics I see of OEM stretch bolts.
They're certainly not studs, & ARP doesn't make anything for my application
If I had a T51 or T52/53, I'd probably have an exact fit (I've never heard of those, have you?)
whatever these are, they measure out precisely as what they should, so I'm seeing no stretch, deformation or other ill effect. I'm wondering if these aren't an aftermarket fastener?

Any advice, suggestions or input is most welcome, as I am simply confused here.
The head gasket was a replacement, so someone has definitely had the head off before I bought the car.

Pistons rods crank and valves appear to be in EXCELLENT condition, hence my ad in the classifieds...

03-01-2009, 07:08 AM
I had a tough time looking for one too. here is the one i bought, and worked for me. If anything I can loan it to you!!!!just pa for shipping.


03-01-2009, 07:13 AM
its a triple square 10mm i believe


03-01-2009, 11:35 AM
Call up this place. There is poly drive tool for stock head bolts and another one for nonstock. I ended up buying them both when i did my head pull just in case.


03-01-2009, 11:51 AM
http://www.pap-parts.com/prodinfo.asp?number=MNXZ10 for the tripplesquare headbolts

http://www.zdmak.com/wbstore/main.asp?action=PROD&PROD=T10070SET2&CTMP=1&LowCt=0 polydrive headbolt version.

These arent the places i got mine from, but now you get an idea of what you need. Ive got both tools just cause i have to deal with new and old headbolts.