hif filter bolts - what size

Post by **d_harris** » Thu Jul 02, 2009 9:47 pm

Does anyone know what size the bolts that hold the air filter onto a hif38 are? We reckon 5/16 unf possibly.

Its just I got a new filterand my old bolts are waay too long!

Post by **Peetee** » Thu Jul 02, 2009 10:04 pm

Fom memory they are quite a course thread.
Two possible options: Cut your bolts down or fit smaller/longer M6 bolts nuts and washers.

Post by **Mogwai** » Thu Jul 02, 2009 10:19 pm

it was 5/16 UNC for the bolts on my HIF44

Post by **PSL184** » Thu Jul 02, 2009 10:39 pm

Just cut old ones down - why spend money on new when you don't have too ??

Post by **d_harris** » Thu Jul 02, 2009 11:26 pm

Because the old ones only have thread on the very end! And are then non-threaded all the way up to the head!

Ditching the pancake in favour of a cone....

Post by **bmcecosse** » Thu Jul 02, 2009 11:37 pm

So they are 'bolts' - not screws. Almost certainly UNC - probably 5/16".

Post by **d_harris** » Fri Jul 03, 2009 12:08 am

Where were screws mentioned BMC?

Post by **bmcecosse** » Fri Jul 03, 2009 8:12 am

Just pointing out the difference!

Post by **d_harris** » Fri Jul 03, 2009 8:16 am

I think most people on here know the difference between a bolt and a screw BMC! I'm just wondering where it came from as screws hadn't been mentioned!