camshaft nut

sleek lemur · Jan 25th, 2021, 13:22

Me again.

I need to buy a socket to tighten this nut. Just want to know the correct size to buy 36mm? 1 7/16 ?

Thanks as always.

Burdekin · Jan 25th, 2021, 13:29

Quote:

Originally Posted by sleek lemur

Me again.

I need to buy a socket to tighten this nut. Just want to know the correct size to buy 36mm? 1 7/16 ?

Thanks as always.

It is imperial so 1 7/16". I did think 36mm fitted though but maybe not.

sleek lemur · Jan 25th, 2021, 13:32

Thanks, Burdekin ! Just to confirm,

Imperial 1 7/16, yes ?

Sorry to be pathetic. Looks 1 13/32 on tape measure!

Burdekin · Jan 25th, 2021, 13:36

Quote:

Originally Posted by sleek lemur

Thanks, Burdekin ! Just to confirm,

Imperial 1 7/16, yes ?

Quote:

Originally Posted by Derek UK

Cam nut is actually 1 7/16". My metric socket rail goes up to 34 I find, but will look out for one or the other at Enfield this weekend. 36mm only £7-8 posted on eBay anyway. Here's me buying things and than maybe having it done in the garage. The engine guy is back from hols next Tuesday so will be in for a chat. He may not be too keen.............. Gear kit arrived from Simon this morning along with a sump gasket. Will also buy a sheet of gasket paper (thick) to make up a bridge piece for the bottom of the timing case to save cutting the expensive full one if it isn't needed.

1.417 36mm
1.418 1 7/16 AF

Close enough.

Derek says it is so will be correct. All Amazon and P1800 will be imperial.

sleek lemur · Jan 25th, 2021, 13:36

Perfect. Thanks very much indeed, Burdekin.

Derek UK · Jan 25th, 2021, 17:00

The whole thread that contains my comment above is worth a read through as it contains info about the correct torque for the cam nut. Don't use the high figure in Haynes and the old Volvo manuals.
https://www.volvoforums.org.uk/showthread.php?t=250654

sleek lemur · Jan 25th, 2021, 20:18

Thanks, Derek. Very useful thread. I have followed Amazon Cars' B18 assembly video for my installation.

"If the garage doing the job doesn't have a good understanding of the B18 then they need to know at TDC No1 on compression stroke the pips on the gears are not together but 180 degrees apart."

This is clearly very important and I nearly had a heart attack when I read it just now as had not considered it. However, I then realised that I am rebuilding the block without the head on !

So, the valves will set themselves to the correct position when I attach the head, yes ?

I understand that I have to adjust the position of the gears when I am inserting the distributor drive.

Heating gears before attempting fitting worked well. Larger cam gear was a bit stiff and I did use the nut to push it on, however thankfully it slipped on without much force and is now flush with the smaller gear. I can't torque it down until the 1 7/16 socket I've bought arrives.

Army · Jan 28th, 2021, 10:20

General information about "is it this - is it that"...

...for six sided / hex nuts and bolt heads look for the many (now widely available) sockets that are dsigned to grip on the flats of the head / nut.

[Cue wavy image of going back in time with wavy harp music]

Back in the day some time in the 1990s I first noticed adverts in classic car magazines for these types of sockets (and spanners) from a company called Metrinch

https://metrinch.com/metrinch_en

Since then the idea has been adopted by many other manufacturers - even people like BGS do them.

I realise this is "yet another tool" to spend money on instead of car parts but if you buy as you go / can afford to buy as you go these "multi-size" solutions do work out to be really useful.

The main thing is that whilst the nearest "imperial" or "metric" size often will do - especially for the larger sizes - the versions that grip the flats are less likely to cause any damage if you need to apply forces inexcess of five white knuckles.

[Disclaimer - smaller sizes of these grip on the flats sockets (say smaller than 10mm) tend not to be as versatile as the larger sizes - but - as you are not likely to be using the white knuckle scale of applyiong torque other "almost the same" sockets tend to work just fine especially on really obsqure old english stuff]

sleek lemur · Jan 28th, 2021, 10:55

Found a 1 7/16 socket at Zoro tools for £7.69, hurrah!, but the issue is that sockets this size all seem to be ¾inch drive, so had to but adaptor for £19.99 boo!

Jan 25th, 2021, 13:22	#1
sleek lemur Senior Member Last Online: Dec 29th, 2022 11:47 Join Date: Jun 2019 Location: Thorndon, near Eye, Suffolk, England	camshaft nut Me again. I need to buy a socket to tighten this nut. Just want to know the correct size to buy 36mm? 1 7/16 ? Thanks as always.

Jan 25th, 2021, 13:32	#3
sleek lemur Senior Member Last Online: Dec 29th, 2022 11:47 Join Date: Jun 2019 Location: Thorndon, near Eye, Suffolk, England	Thanks, Burdekin ! Just to confirm, Imperial 1 7/16, yes ? Sorry to be pathetic. Looks 1 13/32 on tape measure! Last edited by sleek lemur; Jan 25th, 2021 at 13:35.

Jan 28th, 2021, 10:20	#8
Army marches on his stomach Last Online: Feb 11th, 2022 03:15 Join Date: Jan 2018 Location: Somewhere in the Netherlands	General information about "is it this - is it that"... ...for six sided / hex nuts and bolt heads look for the many (now widely available) sockets that are dsigned to grip on the flats of the head / nut. [Cue wavy image of going back in time with wavy harp music] Back in the day some time in the 1990s I first noticed adverts in classic car magazines for these types of sockets (and spanners) from a company called Metrinch https://metrinch.com/metrinch_en Since then the idea has been adopted by many other manufacturers - even people like BGS do them. I realise this is "yet another tool" to spend money on instead of car parts but if you buy as you go / can afford to buy as you go these "multi-size" solutions do work out to be really useful. The main thing is that whilst the nearest "imperial" or "metric" size often will do - especially for the larger sizes - the versions that grip the flats are less likely to cause any damage if you need to apply forces inexcess of five white knuckles. [Disclaimer - smaller sizes of these grip on the flats sockets (say smaller than 10mm) tend not to be as versatile as the larger sizes - but - as you are not likely to be using the white knuckle scale of applyiong torque other "almost the same" sockets tend to work just fine especially on really obsqure old english stuff] __________________ 1961 Volvo PV544 the quick and easy in between project(!) 1981 Mercedes 300D <=> 230 diesel to petrol conversion project 1965 Series 2a Station Wagon mega build 1992 Mercedes 190E The car that works!

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Jan 25th, 2021, 13:36	#5
sleek lemur Senior Member Last Online: Dec 29th, 2022 11:47 Join Date: Jun 2019 Location: Thorndon, near Eye, Suffolk, England	Perfect. Thanks very much indeed, Burdekin.

Jan 25th, 2021, 17:00	#6
Derek UK VOC Member Last Online: Today 11:36 Join Date: Jul 2006 Location: Chatham	The whole thread that contains my comment above is worth a read through as it contains info about the correct torque for the cam nut. Don't use the high figure in Haynes and the old Volvo manuals. https://www.volvoforums.org.uk/showthread.php?t=250654

Jan 25th, 2021, 20:18	#7
sleek lemur Senior Member Last Online: Dec 29th, 2022 11:47 Join Date: Jun 2019 Location: Thorndon, near Eye, Suffolk, England	Thanks, Derek. Very useful thread. I have followed Amazon Cars' B18 assembly video for my installation. "If the garage doing the job doesn't have a good understanding of the B18 then they need to know at TDC No1 on compression stroke the pips on the gears are not together but 180 degrees apart." This is clearly very important and I nearly had a heart attack when I read it just now as had not considered it. However, I then realised that I am rebuilding the block without the head on ! So, the valves will set themselves to the correct position when I attach the head, yes ? I understand that I have to adjust the position of the gears when I am inserting the distributor drive. Heating gears before attempting fitting worked well. Larger cam gear was a bit stiff and I did use the nut to push it on, however thankfully it slipped on without much force and is now flush with the smaller gear. I can't torque it down until the 1 7/16 socket I've bought arrives.

Jan 28th, 2021, 10:55	#9
sleek lemur Senior Member Last Online: Dec 29th, 2022 11:47 Join Date: Jun 2019 Location: Thorndon, near Eye, Suffolk, England	Found a 1 7/16 socket at Zoro tools for £7.69, hurrah!, but the issue is that sockets this size all seem to be ¾inch drive, so had to but adaptor for £19.99 boo!

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