Jump to content

Easy way to bleed a Spitty 1500 clutch?


Recommended Posts

As above.

At the moment the biting point on my Spitfire is laughable (it is pretty much nearly on the floor).  At some junctions ( in order to get it into first) I have to turn the engine off and then engage first starting it with the clutch down (other method is to wait a minute with the clutch down to the floor and hope the lights don't change again!).

Again, changing gear on the move is fun.  Overdrive is certainly handy!

However, attempting to bleed the clutch by the book seems nearly impossible with next to no room to move a spanner in, and bleed nipple (at the top) obstructed by the solid clutch pipe.

I did consider taking off the gearbox cover, but it appears that I need to remove the dash in order to remove the centre dash support which sits on top of the gearbox.

So, to cut a long story short, what tips do you have for making bleeding a Spitfire's clutch easier?  If it is nearly impossible to do underneath, any tips for bleeding the clutch inside the car which does not entail taking apart pretty much the entire dash?

Link to comment
Share on other sites

First of all check the datum pin and arms for wear. This is the bit where the peddle fixes to the slave piston rod. The smallest bit of wear will mean a lot of movement at the peddle before the clutch starts to engage.
Then if you need to bleed the system take the H frame (dash support) out and remove the tunnel.

Link to comment
Share on other sites

Just remembered....check the slave is pushed forward as far as possible then tighten the securing bolt.
What I did with mine was to connect a extnsion copper pipe from the slave bleed hole to the engine compartment with a bleed nipple on the end so in future it can be bled easily from under the bonnet.

Link to comment
Share on other sites

To get my pedal to "feel right" I had to :-
  Remove the slave cylinder and its mounting clamp from the bell housing.
Press the clutch pedal until the the slave cylinder piston is out as far as it will go,it will hit the circlip.
Now bleed again.
Let the fluid go half way down in the master cylinder.
Now remount the slave cylinder,as you tighten the two bolts it will "pull" the slave cylinder back against the bellhousing as it does it will force the slave cylinders piston back in which will in turn "reverse bleed" the system.
Keep an eye on the master cylinder as it will be filling up as you go and you don't want it to overfill and spill over.

I had replaced the piviot Pins on the release arm and the piviot pins at the master cylinder end
I had also replaces the push rod on the piviot arm.
Basicly everything was new,before I started the pedal felt fine.
When all the work was done the pedal was "right on the floor" and as you have said the clutch was dragging.
After doing the "reverse bleed " everything was spot on !

Make sure as Danny has said that the slave cylinder is pushed as far into its mounting block

Link to comment
Share on other sites

Quite a few pointers to go on then :).

After carrying out some investigation today it seemed that my datum points had quite a significant amount of wear present.  There was plenty of slop present in the pedal (about a couple of inches at the pedal end).  And so I went out and purchased a new fork/pushrod for the master cylinder complete with a new clevis pin (the old pin had worn down quite badly).  The play in the datum point was significantly reduced resulting in a slightly better clutch but it is still dragging with the biting point still being on the floor near enough.

I reckon that it is time for me to figure out how to remove the H-Frame (any tips?  I have a CD player installed in my car which seems to prevent the H frame from being slid out, unless I remove more of the dash.  

The cheat's method of an access panel does not seem like too bad an idea now!  There I shall bleed the system out (using the reverse bleed method; It worked on a Dolomite Sprint many years ago) in addition to seeing if I can push the slave cylinder any further forward in its bracket :).

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...