problem with cam follower

Talk about the E-Type Series 1
User avatar

rfs1957
Posts: 873
Joined: Sat Jan 15, 2011 2:52 pm
Location: Montpellier, France
France

#21 Re: problem with cam follower

Post by rfs1957 » Tue Sep 17, 2019 10:55 am

http://www.mactools.co.uk/rate-mac-tool ... -installer

Fascinated by this, never knew such a tool existed ?

Can see how it would pop out an installed pair of collets, but not how you would use it to compress the springs in a controlled way to get them back in.

I'd have thought banging them on would lead to the collets scoring the valve stem, but I'm obviously wrong.

Please enlighten us Andrew, as I am poised to buy one, looks brilliant !
Rory
3.8 OTS Cream 877393 Built May 28th 1962
1978 Mini Van
(plus bevel and belt single-cylinder Ducatis)

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

abowie
Posts: 2513
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#22 Re: problem with cam follower

Post by abowie » Tue Sep 17, 2019 11:05 am

You need something supporting the valve head underneath. We have the "boobie board" which seems to have six breasts made of wood, but you could use pretty much anything.
Andrew.
881824, 1E21538. 889457..oops
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

rfs1957
Posts: 873
Joined: Sat Jan 15, 2011 2:52 pm
Location: Montpellier, France
France

#23 Re: problem with cam follower

Post by rfs1957 » Tue Sep 17, 2019 11:19 am

Yes, get the need for an anvil ; but you just load both collets, apply hand-pressure to the tool to centre it and compress the spring-retainer a bit, then whack it with an appropriate blow ?

You're not winding us up over Smith being caught by Stokes ?
Rory
3.8 OTS Cream 877393 Built May 28th 1962
1978 Mini Van
(plus bevel and belt single-cylinder Ducatis)

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

abowie
Posts: 2513
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#24 Re: problem with cam follower

Post by abowie » Wed Sep 18, 2019 12:00 am

All it takes is a solid two hand push to compress the springs and the collets drop in. The bench I use has a vertical back on it and the head rests against that so you have plenty of purchase.

Image

Bouncing the collets out usually needs multiple goes and I tend to use a hammer, although the magnet helps pull the collet out of the way once it's loose. Chris, my boss, just uses a deep socket and a hammer.

The "boobie board" has hemispherical wooden pieces on it that line up perfectly with the chambers but you could use whatever you want under the valve. I've not removed valve collets on an E Type with the head on but I have done it on a Honda. I used the rope in the cylinder trick as I wan't confident about using compressed air.

You can also buy valve compressors with a frame that will mount to the studs on the top of the head and wind down on the spring so you don't have to hit anything. I've not ever used one.
Andrew.
881824, 1E21538. 889457..oops
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

Link:
BBcode:
HTML:
Hide post links
Show post links


Topic author
SteveRTennison
Posts: 7
Joined: Sun Jan 21, 2018 5:36 pm
Great Britain

#25 Re: problem with cam follower

Post by SteveRTennison » Wed Sep 18, 2019 2:43 pm

All the springs and valves were replaced when the engine was rebuilt so I tend to go with the dodgy batch of springs hypothesis - the car has only done 3000miles since the rebuild.

Just getting onto checking the gaps with the head still of the car - anybody got a suggestion for rotating the inlet cam shaft to do this, exhaust cam shaft is OK as it has a lock nut on the end.

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

rfs1957
Posts: 873
Joined: Sat Jan 15, 2011 2:52 pm
Location: Montpellier, France
France

#26 Re: problem with cam follower

Post by rfs1957 » Wed Sep 18, 2019 3:12 pm

I use a 3/8 UNF bolt locked with a lock-nut into one of the sprocket-mounting threads on the cam, and then use a 9/16 AF spanner on it. Watch out for valve-valve contact, therefore easier if you remove the cam you're not measuring.
Rory
3.8 OTS Cream 877393 Built May 28th 1962
1978 Mini Van
(plus bevel and belt single-cylinder Ducatis)

Link:
BBcode:
HTML:
Hide post links
Show post links

User avatar

abowie
Posts: 2513
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#27 Re: problem with cam follower

Post by abowie » Wed Sep 18, 2019 9:29 pm

As Rory says. I only install one cam at a time. Install the downward pointing 5/16" studs in the front of the head and put a 1" high piece of wood under the back to support the head.

I have a cam vernier with a bolt welded in the centre but if you install 2 bolts you can use a lever to turn the cam.
Andrew.
881824, 1E21538. 889457..oops
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

Link:
BBcode:
HTML:
Hide post links
Show post links

Post Reply Previous topicNext topic