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PostPosted: Tue Sep 17, 2019 4:11 pm 
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drmini in aust wrote:
It's an easy job with no booster in the way. Just bend a cheap 1/2" ring/OE spanner 45° at ring end to easily reach the 2 bottom bolts.

I bought a new set of bolts for the wok and they are 7/16” flanged bolts, hopefully a little easier to remove. I have a spare spanner to sacrifice

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PostPosted: Tue Sep 17, 2019 5:19 pm 
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I always leave out the hardest to reach wok bolt. A trick my dad taught me.


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PostPosted: Tue Sep 17, 2019 5:55 pm 
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phillb wrote:
I always leave out the hardest to reach wok bolt. A trick my dad taught me.


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yep me too. It's the one at around 8 O-clock.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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PostPosted: Sat Sep 21, 2019 7:15 pm 
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Changing over the plunger took a couple of hours this morning but the outcome was definitely worth it!
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Drmini offered to sleeve the new plunger as the new ones are very soft
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The new clutch arm is now installed (and painted black for you TK :lol: ) . The clutch pedal feels fantastic now, it doesn't feel any stiffer than the old setup
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It's immediately obvious the improved angle of the clutch arm, and also the reduced amount of clutch pushrod visible
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After all day in the garage we have the first sign of life!
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PostPosted: Sun Sep 22, 2019 8:30 am 
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Looks good Timmy.
The steel bush is hardened silver steel, it's about HRC 50.

GR and I measured these cheap plungers at HRC 3 hardness a while back. Dead soft free machining steel.
The more expensive en24t ones were not much harder. :(

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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PostPosted: Sun Sep 22, 2019 11:05 am 
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I wanted green not black Timmy :(

Good work mate.

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PostPosted: Sun Sep 22, 2019 8:05 pm 
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Another long day of car stuff with some help from PhillB we knocked out most of the remaining jobs. First thing in the morning was checking the base timing, I had the suspicion I'd put the distributor drive in 180 degrees out. I checked it and I think I'm one tooth out as the distributor is rotated all the way to the left. After sorting that out the engine started right up!!
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After a couple of little teething problems (loose distributor and then loose throttle linkage) we did a couple of laps around the estate and some uphill pulls under load. It absolutely rips along now, clutch is great, gearbox has 4 synchros which is awesome for me :D (car still needs a wash from Rylstone as you can tell from the windscreen)
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PostPosted: Mon Sep 23, 2019 8:08 am 
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That mobile A/F meter setup looks familiar, haha. ;)

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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PostPosted: Wed Sep 25, 2019 6:00 pm 
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drmini in aust wrote:
Looks good Timmy.
The steel bush is hardened silver steel, it's about HRC 50.

GR and I measured these cheap plungers at HRC 3 hardness a while back. Dead soft free machining steel.
The more expensive en24t ones were not much harder. :(


so Kev, do you harden the end of the lever or is there a preferred version that's OK as is??

Cheers, Ian


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PostPosted: Wed Sep 25, 2019 6:49 pm 
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MED
https://www.med-engineering.co.uk/clutc ... clutch-arm

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PostPosted: Wed Sep 25, 2019 6:59 pm 
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1071 S wrote:
drmini in aust wrote:
Looks good Timmy.
The steel bush is hardened silver steel, it's about HRC 50.

GR and I measured these cheap plungers at HRC 3 hardness a while back. Dead soft free machining steel.
The more expensive en24t ones were not much harder. :(


so Kev, do you harden the end of the lever or is there a preferred version that's OK as is??

Cheers, Ian

I just used the “heavy duty” arm available from the normal shops. I’d rather replace the arm any day than the plunger, so the arm being slightly softer in my mind is a good idea

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PostPosted: Thu Sep 26, 2019 8:38 am 
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1071 S wrote:
drmini in aust wrote:
Looks good Timmy.
The steel bush is hardened silver steel, it's about HRC 50.

GR and I measured these cheap plungers at HRC 3 hardness a while back. Dead soft free machining steel.
The more expensive en24t ones were not much harder. :(


so Kev, do you harden the end of the lever or is there a preferred version that's OK as is??

Cheers, Ian


Ian, I find the heavy duty arms like Tim's are pretty hard, the ball is heat treated unlike the current plungers.
Original BMC plungers were over 50 HRC you cannot file them.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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PostPosted: Thu Sep 26, 2019 11:07 am 
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timmy201 wrote:
Drmini offered to sleeve the new plunger as the new ones are very soft.

Are the current new ones unacceptably 'soft'. I've heard that a batch or type some time ago were 'soft' but the current version is OK.

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PostPosted: Thu Sep 26, 2019 11:14 am 
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I bought the cheapest $15 plunger as I knew it would be sleeved, and it was very soft.

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PostPosted: Thu Sep 26, 2019 12:41 pm 
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@winabbey,
They are still soft, the suppliers have done SFA about it.
It was like drilling butter.
Material is obviously free machining steel, ledbrite or similar. Can't be hardened.

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