Coolant Bleed Screw questions

__chris__ · 11th March 2013, 11:23

Looking at the photo in the Haynes manual, the bleed screw looks like, well, a screw.

In my car there's an 8mm bolt.

Is this right / common ? If not, should I try and replace it or leave it as it is? There's no other bleed valve is there?

dissy1810 · 11th March 2013, 11:33

It is an 8mm bolt with a washer on it to seal the hole

T-Cut · 11th March 2013, 14:40

Quote:

Originally Posted by __chris__

Looking at the photo in the Haynes manual, the bleed screw looks like, well, a screw. In my car there's an 8mm bolt.

When is a screw not a screw?
When it's a bolt.

TC

__chris__ · 14th March 2013, 09:04

Thanks. I'll see if I can source a washer from somewhere.

Steve1966 · 14th March 2013, 11:19

Quote:

Originally Posted by T-Cut

When is a screw not a screw?
When it's a bolt.

TC

To be correct, a screw is a bolt that is threaded right up to the head. A bolt is a bolt that isn't.

stugee · 14th March 2013, 12:20

Quote:

Originally Posted by Steve1966

To be correct, a screw is a bolt that is threaded right up to the head. A bolt is a bolt that isn't.

So what is this? A screw?

Steve1966 · 14th March 2013, 12:30

Quote:

Originally Posted by stugee

So what is this? A screw?

In Rover speak it definitely is. The Rover system for fixings began, for example, with FS110251 for a flange screw, or FB110151 for a flange bolt. In my 22 years in Rover product development what you picture was always a screw.

SD1too · 14th March 2013, 12:32

Quote:

Originally Posted by __chris__

Looking at the photo in the Haynes manual, the bleed screw looks like, well, a screw. In my car there's an 8mm bolt.

Chris,

Are you referring to fig. 27.37 on page 1A●21 of Haynes? If so, that photograph refers to the V6 engine as stated in the text, which does have a screw head. Haynes doesn't include a photograph of the 1.8 hose, but the MG Rover manual shows a hexagon head as confirmed in this thread.

So everyone is happy!

Simon

SD1too · 14th March 2013, 12:35

Quote:

Originally Posted by Steve1966

In Rover speak it definitely is.

Not just at Rover Steve. In my experience what you describe is normal engineering terminology.

Then there's the 'set screw' ....

Simon

bl52krz · 14th March 2013, 15:45

Sorry, but i always thought that a screw had a slot in the head to tighten it up. And a bolt had a hexagon head so you could use a spanner? :co nfused:

11th March 2013, 11:23	#1
__chris__ Avid contributor 2003 MG ZT 190+,(2005 Facelift R75 1.8T SE Conny now consigned to be a donor car) Join Date: Sep 2012 Location: Sidcup Posts: 149 Thanks: 34 Thanked 4 Times in 4 Posts	Coolant Bleed Screw questions Looking at the photo in the Haynes manual, the bleed screw looks like, well, a screw. In my car there's an 8mm bolt. Is this right / common ? If not, should I try and replace it or leave it as it is? There's no other bleed valve is there? __________________ Chris. Work on the 1.8T New pads &cs all round, Bonnet Catch Reversed, Plenums Cleaned, Renewed Selected Radiator Hoses, New Stainless Steel Twin Exhaust,Metal T-Piece, Head Skimmed and MLS Head Gasket, New Cambelt & Alternator Belt, New PRT & Water Pump, New Air Duct Hose, New Radiator, New plugs, coil packs & HT leads, Golden Radiator Resistor. Car then blew up and I gave up. Bought the ZT 190 instead !

11th March 2013, 11:33	#2
dissy1810 Posted a thing or two mgzt 160 1.8 lpg Join Date: Mar 2010 Location: newcastle upon tyne Posts: 1,973 Thanks: 5 Thanked 72 Times in 64 Posts	It is an 8mm bolt with a washer on it to seal the hole __________________ http://i1030.photobucket.com/albums/...0/Photo389.jpg

14th March 2013, 09:04	#4
__chris__ Avid contributor 2003 MG ZT 190+,(2005 Facelift R75 1.8T SE Conny now consigned to be a donor car) Join Date: Sep 2012 Location: Sidcup Posts: 149 Thanks: 34 Thanked 4 Times in 4 Posts	Thanks. I'll see if I can source a washer from somewhere. __________________ Chris. Work on the 1.8T New pads &cs all round, Bonnet Catch Reversed, Plenums Cleaned, Renewed Selected Radiator Hoses, New Stainless Steel Twin Exhaust,Metal T-Piece, Head Skimmed and MLS Head Gasket, New Cambelt & Alternator Belt, New PRT & Water Pump, New Air Duct Hose, New Radiator, New plugs, coil packs & HT leads, Golden Radiator Resistor. Car then blew up and I gave up. Bought the ZT 190 instead !

14th March 2013, 15:45	#10
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,396 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Sorry, but i always thought that a screw had a slot in the head to tighten it up. And a bolt had a hexagon head so you could use a spanner? :co nfused: __________________ Great Barr, Birmingham.