bolt size please!

lansalot · Post by **lansalot** » Thu Oct 09, 2014 5:28 pm

Hi all

Can anyone advise what type the 4 bolts that hold the injector rail to the injection manifold on a Range Rover '91 Hotwire EFI Vogue are please?

That's FN106047L (part #2) in the diagram here http://www.landroverworkshop.com/diagra ... ipes_53401

Got some M6 bolts.. no joy. Was then told they were 1/4 UNF x 1/2 inch, so got some of them but nope. So then found that above diagram which says part number 2 is an M6 nut flange. I don't remember them being flanges tho...

And this pic would suggest same: http://www.britishv8.org/articles/Image ... -EFI-3.jpg

Mine got lost during the strip down. Little help?
Cheers

ChrisJC · Post by **ChrisJC** » Thu Oct 09, 2014 6:22 pm

I would guess 1/4 UNC as the engine is mostly UNC.

Chris.

SuperV8 · Post by **SuperV8** » Fri Oct 10, 2014 3:04 pm

FN106047L is a nut!

ERR4309 is the stud
http://www.landroverworkshop.com/diagra ... fold_53402

I think i've used stainless steel cap head bolts, I'll try and have a look later

Tom.

lansalot · Post by **lansalot** » Wed Oct 22, 2014 7:26 pm

Thanks Tom, those are shown as M6x22 but the M6s I have don't appear to go in. Hmmmm... Neither did the UNC I had before. Maybe they're just furred up, I'll take another look..

SuperV8 · Post by **SuperV8** » Thu Oct 23, 2014 7:39 am

Haven't been able to check my car as it's not at my house yet.

What thread pitch does the M6 bolt have you tried have?
1 or 0.75?

Tom.

minorv8 · Post by **minorv8** » Thu Oct 23, 2014 8:13 am

I just had a look at the spare manifold in my garage ans though about your question. I did not check the thread because I thought you already got your answer. Will check tonight...

SimpleSimon · Post by **SimpleSimon** » Thu Oct 23, 2014 10:23 am

Def M6 X 1MM thread but length not sure about

but short

DaveEFI · Post by **DaveEFI** » Thu Oct 23, 2014 2:49 pm

I've got a fairly late Hotwire manifold here - the one where the thermostat isn't in the old housing.

The fuel rail fixing is studs and nuts - rather than bolts. The other two fixings per side - originally for the older style injector carriers - are used for wiring loom fixings. Those are set screws (with odd shaped heads) - and are M6x 1.0 as are the nuts which fit the studs. So I'm assuming the stud thread to manifold is the same.

The older engines deffo had 1/4" UNC here. I think.

minorv8 · Post by **minorv8** » Thu Oct 23, 2014 6:51 pm

The threads are all M6, the depth of the threaded holes is 16 mm or 5/8" if you prefer imperial units. The pitch is 1 mm as already mentioned.