HQ Firewall holes

**mauser** · 07-03-2015, 04:13 PM

firewall4_1.jpg

Anyone with a HQ tell me what those two holes in the firewall are? They look factory not drilled so I havnt welded them up.

Mauser

**Alien DNA** · 07-03-2015, 05:11 PM

Might be some electrical cable holes.....not near my van to check it out

**AN5590** · 07-03-2015, 06:35 PM

The one in centre has strange shaped plug/grommet - sticks out a fair bit and ends in a cone shaped point on the engine side, could take a photo if it helps. The one to left has wiring thru it on my car, but has been messed with a bit i.e. has had non factory harness wires so can't tell for sure.

**Sandaro** · 07-03-2015, 09:49 PM

Originally Posted by AN5590

The one in centre has strange shaped plug/grommet - sticks out a fair bit and ends in a cone shaped point on the engine side, could take a photo if it helps. The one to left has wiring thru it on my car, but has been messed with a bit i.e. has had non factory harness wires so can't tell for sure.

Same cone shaped grommet on central one. Other one is factory provision for manual choke cable when fitted I believe.

**Nocturne** · 10-03-2015, 06:57 PM

Originally Posted by Sandaro

Same cone shaped grommet on central one. Other one is factory provision for manual choke cable when fitted I believe.

IMAG1635.jpg

Same on this (1971, Sydney build); the driver side hole lines up with the choke lever spot in the dash. It has a plug that looks similar to those holding the kickboards in (under the dash). The cone-shaped grommet is in the other as Sandaro & AN5590 say.

**wbute** · 07-03-2015, 06:46 PM

Fairly sure one was blank for the integrated air wiring/vacuum hoses. Normally just a centre punch mark. Could be wrong though.

**AN5590** · 07-03-2015, 06:54 PM

I think both are holes from factory as both 1972 and 1974 ute firewalls I looked at have them... Cheers.

**mauser** · 09-03-2015, 10:52 PM

Originally Posted by AN5590

I think both are holes from factory as both 1972 and 1974 ute firewalls I looked at have them... Cheers.

Cool, well that means Ill leave them alone and grommet them.

Thanks for everyone answering.

Mauser

**Innuendo** · 07-03-2015, 10:16 PM

Isn't the centre hole for a bolt/screw that comes from under the dash that gets covered in mastic?

**HK1837** · 10-03-2015, 08:17 PM

Originally Posted by Innuendo

Isn't the centre hole for a bolt/screw that comes from under the dash that gets covered in mastic?

You can see that threaded-rod/bolt in the picture if you open it up and squint closer. Always shook my head at that, must have been an Engineering add-on required for some reason - you can't imagine GMH doing it from scratch that way. It may be a hangover from the original US designs for the HQ? The other guys have nailed the reason for the holes.