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The 100 Forum

Early door check strap

Moss Motors
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Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
Evening all,

Any ideas about how to obtain, or make, the springs?

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filospinato Avatar
filospinato Jake Voelckers
Manassas, VA, USA   USA
I've got the same issue, I haven't been able to find the exact thickness/width spring steel.
These are the same as used on Triumph TR2 and early TR3. You can get reproductions from Moss but they have thinner, double springs and don't 'check' as well as the OE stuff.
I'm going to pull them all apart and re-plate the bits, the test piece turned out OK.


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Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
Hi Jake,

Yes, I've seen the Moss replacements and also decided against them.

I agree, getting a thicker piece of spring steel is a problem. I'll be happy with any spring as long as it works and survives for several years.

Rummaging around my scrap pile as I speak!

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spinaway Des Spillane
Timaru, Canterbury, New Zealand   NZL
1954 Austin-Healey 100 "Fred"
I also have the same need of replacement leaf springs to go inside the early BN1 door checks. Mine are all broken in half just as the ones of you two guys are.
I have tried quite a few options of springs to use in there without complete success. Closest I have got so far was using some flat springs ex very old mortice door lock mechanisms but they just didnt quite do it.
Did chat with Michael Salter in Canada about this, and he has managed to repair some of these door-checks using broken off bristles from big mobile street sweepers. I presume these were metal spring bristles on large rotary brushes.
I have yet to enquire at our local city council maintenance department to see what kind bristles they have on their sweeper !!

Some information on the Boras Motor Corp website in Sweden is of interest re these door-checks.
http://healeyspecialists.com/restoration-of-the-first-healey-imported-into-sweden/

Have a look at pictures 248-to-251 and pictures 498-to-505.
This shows his attempts to use the current aftermarket replacement door checks made for TRs. They turned out to be rubbish just as per your comments above. The springs inside them are very wimpy.
He got lucky and found some original springs !

That Boras website is very good and the guy is very generous listing all his restorations pictures.
Regards

filospinato Avatar
filospinato Jake Voelckers
Manassas, VA, USA   USA
I took some measurements from one of the springs last night, and created a simple drawing. I sent it off to Smalley to see if they want to quote making some, will advise if I hear back.
Barring that, I plan to get some 1mm spring strips to see if I can make some replacements.
I have two OE TR3 checks with good springs and one that I took apart for experimentation, we'll see if something workable comes out of it.
I also plan to replace the rollers with cut to length drill rod.

Triggerfish Avatar
Triggerfish Andrew Dineen
Earth, North Wales, UK   GBR
I've ordered some 1mm strips of annealed steel, with the idea of fabricating the springs, the easy bit! Then i thought I'd have a go at hardening them to make spring steel...I'm sure youtube will instruct me on that.

In the mean time, when I opened the second check, after de-rusting, the springs seem okay. I've made 4 new springs by cutting up a hacksaw blade. I've shared the four original and the home made ones between the two checks, and I have to say, the result isn't bad. I'm confident they will hold the door open.

oh-healee Chris Clark
Delaware, OH, USA   USA
filospinato Avatar
filospinato Jake Voelckers
Manassas, VA, USA   USA
I just got a quote back from Smalley for a small run of linear springs, its pretty cost prohibitive considering that it's not too difficult to heat treat and temper spring steel at home. I'm going to go the homemade route.

jhc928 Avatar
jhc928 john curtis
bungay, england, UK   GBR
I have the same problem and have been looking for a fix for quite a while ,would be great if someone made a batch there seems to be a market for them

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