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hif filter bolts - what size
Posted: Thu Jul 02, 2009 9:47 pm
by d_harris
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!
Posted: Thu Jul 02, 2009 10:04 pm
by Peetee
Fom memory they are quite a course thread.
Two possible options: Cut your bolts down or fit smaller/longer M6 bolts nuts and washers.
Posted: Thu Jul 02, 2009 10:19 pm
by Mogwai
it was 5/16 UNC for the bolts on my HIF44
Posted: Thu Jul 02, 2009 10:39 pm
by PSL184
Just cut old ones down - why spend money on new when you don't have too ??
Posted: Thu Jul 02, 2009 11:26 pm
by d_harris
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....
Posted: Thu Jul 02, 2009 11:37 pm
by bmcecosse
So they are 'bolts' - not screws. Almost certainly UNC - probably 5/16".
Posted: Fri Jul 03, 2009 12:08 am
by d_harris
Where were screws mentioned BMC?
Posted: Fri Jul 03, 2009 8:12 am
by bmcecosse
Just pointing out the difference!
Posted: Fri Jul 03, 2009 8:16 am
by d_harris
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!