Balance Link Springs

Talk about the E-Type Series 1
User avatar

Topic author
Philk
Posts: 418
Joined: Wed Dec 07, 2016 7:48 am
Great Britain

#1 Balance Link Springs

Post by Philk » Mon Feb 03, 2020 4:49 pm

I've just taken delivery of four replacement bonnet balance link springs (BD19972) from SNG to save myself the challenge of stripping, priming and repainting my 3.8 S1 originals (which, annoyingly, had been repainted silver in the past). To my surprise, the springs are of a different design in terms of the location of the "eye hooks"... the dimensions (and number of coils) in the spring are identical but the "eye hook" at each end of the new spring are on opposite sides of the spring whereas my original spring has them centred (see image below). In addition, it looks like the new springs have been painted in their compressed position which means each coil is joined to each other with a paint "bridge" which will crack open when the spring is stretched when the bonnet is in its closed position.

Image

I've raised these points with SNG who are looking into things. In the meantime, is anyone aware of whether the spring design was changed at any point from centre "eye hooks" to offset?

Many thanks!
Last edited by Philk on Mon Feb 03, 2020 6:26 pm, edited 1 time in total.
Phil
1964 S1 3.8 OTS

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

User avatar

mgcjag
Moderator
Posts: 5891
Joined: Fri Jul 09, 2010 6:15 pm
Location: Ludlow Shropshire
Great Britain

#2 Re: Balance Link Springs

Post by mgcjag » Mon Feb 03, 2020 5:33 pm

Hi Phil.....what am i missing they look almost identical in the photo...Steve
Steve
1969 S2 2+2 & Building a C type replica

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

User avatar

Topic author
Philk
Posts: 418
Joined: Wed Dec 07, 2016 7:48 am
Great Britain

#3 Re: Balance Link Springs

Post by Philk » Mon Feb 03, 2020 5:51 pm

mgcjag wrote:
Mon Feb 03, 2020 5:33 pm
Hi Phil.....what am i missing they look almost identical in the photo...Steve
Hi Steve

Hopefully clearer on the photo below (where I've added some centre lines). On my old (silver) spring, the hooks are in the centre at both ends. On the new springs, they are on opposite sides of the centre lines. As such, when fitted to the car, they'll be aligned differently to my existing springs. In other respects (dimensions / no. of coils the springs are identical)

Having trawled through some of the Forum pages, I'm wondering whether the spring designs were altered when some of the different bonnet link arms were introduced (which had different angles present within them).

Best Regards

Phil

Image
Phil
1964 S1 3.8 OTS

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

User avatar

abowie
Posts: 3016
Joined: Wed Sep 07, 2011 9:15 pm
Location: Australia
Contact:
Australia

#4 Re: Balance Link Springs

Post by abowie » Mon Feb 03, 2020 8:27 pm

Just reuse your old ones.
Andrew.
881824, 1E21538. 889457..oops. Jezza the V12 XJS race car.
http://www.projectetype.com/index.php/the-blog.html
Adelaide, Australia

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


265bhp
Posts: 699
Joined: Wed Jan 26, 2011 10:29 pm
Location: surrey
Great Britain

#5 Re: Balance Link Springs

Post by 265bhp » Mon Feb 03, 2020 11:17 pm

I spent ages cleaning my old ones...and to avoid the problem of painting in the unstretched position, I stretched them whilst painting..... :roll:
1963 3.8 FHC in slow restoration mode
1974 2.7 Carrera now as an RS Touring

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

User avatar

Topic author
Philk
Posts: 418
Joined: Wed Dec 07, 2016 7:48 am
Great Britain

#6 Re: Balance Link Springs

Post by Philk » Tue Feb 04, 2020 8:49 pm

265bhp wrote:
Mon Feb 03, 2020 11:17 pm
I spent ages cleaning my old ones...and to avoid the problem of painting in the unstretched position, I stretched them whilst painting..... :roll:
I may go down that route. Out of interest, what brand of gloss black paint did you use on them? Did you prime them first?
Phil
1964 S1 3.8 OTS

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


265bhp
Posts: 699
Joined: Wed Jan 26, 2011 10:29 pm
Location: surrey
Great Britain

#7 Re: Balance Link Springs

Post by 265bhp » Tue Feb 04, 2020 10:14 pm

Hi Phil
A quick etch prime and then gloss top coat...all in 2K paint, no particular brand
Best
Jonathan
1963 3.8 FHC in slow restoration mode
1974 2.7 Carrera now as an RS Touring

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

User avatar

Topic author
Philk
Posts: 418
Joined: Wed Dec 07, 2016 7:48 am
Great Britain

#8 Re: Balance Link Springs

Post by Philk » Tue Mar 24, 2020 8:18 am

265bhp wrote:
Tue Feb 04, 2020 10:14 pm
Hi Phil
A quick etch prime and then gloss top coat...all in 2K paint, no particular brand
Best
Jonathan
The lockdown is providing the ideal opportunity to do this. Heavy duty frame constructed, springs bead blasted (offsite at an earlier stage), wire brushed (with coils stretched open), etch primed and gloss painted. Time consuming but very satisfying in terms of the end result. The only thing I have to do is tidy up the ends of the hooks where the wires went to pull the springs open.

Image

Frame constructed prior to springs being stretched out

Image

Springs etch primed - Note how far the eye-hook has moved - with the number of coils in each spring, just opening to a 1-1.5mm gap between each coil adds considerably to their length. [This was the second pair of springs - I forgot to photograph the etch prime stage on the first pair - these are bagged up post-painting in the background of the picture]

Image

Springs top-coated. Eye-hook released by a small amount just to reduce overall tension but with gaps still present between the coils for the paint to cure. I left them 3 days prior to releasing completely.
Phil
1964 S1 3.8 OTS

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


265bhp
Posts: 699
Joined: Wed Jan 26, 2011 10:29 pm
Location: surrey
Great Britain

#9 Re: Balance Link Springs

Post by 265bhp » Tue Mar 24, 2020 9:20 pm

Good job Phil
Well worth it
1963 3.8 FHC in slow restoration mode
1974 2.7 Carrera now as an RS Touring

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

User avatar

PeterCrespin
Posts: 4411
Joined: Fri Mar 05, 2010 8:22 pm
Location: Gaithersburg, Maryland.
Contact:
United States of America

#10 Re: Balance Link Springs

Post by PeterCrespin » Tue Mar 24, 2020 9:38 pm

Perfectly beveled jig corners - weep! Mine aren’t that nice when I’m framing a picture.

I suppose you’re good looking and excel at sports as well?
1E75339 UberLynx D-Type; 1R27190 70 FHC; 1E78478; 2001 Vanden Plas

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

User avatar

Topic author
Philk
Posts: 418
Joined: Wed Dec 07, 2016 7:48 am
Great Britain

#11 Re: Balance Link Springs

Post by Philk » Wed Mar 25, 2020 12:15 pm

PeterCrespin wrote:
Tue Mar 24, 2020 9:38 pm
Perfectly beveled jig corners - weep! Mine aren’t that nice when I’m framing a picture.

I suppose you’re good looking and excel at sports as well?
You can take comfort in neither of the above being true! Years ago, I purchased a mitre saw to deal with a DIY project I had underway in the house and I've been surprised at how much I've used it over the years. Whilst the corner joints were glued on the "spring frame", I also put a substantial screw into each corner. It's quite amazing the amount of force required to pull the two springs open by an inch or so each.
Phil
1964 S1 3.8 OTS

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

User avatar

Topic author
Philk
Posts: 418
Joined: Wed Dec 07, 2016 7:48 am
Great Britain

#12 Re: Balance Link Springs

Post by Philk » Fri Mar 27, 2020 7:04 pm

And.... today, the finished product fitted. A very enjoyable task (aside from cleaning up the brass washers!).

Image
Phil
1964 S1 3.8 OTS

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

User avatar

Jeremy
Posts: 674
Joined: Sat Nov 28, 2015 11:16 pm
Location: West London
Great Britain

#13 Re: Balance Link Springs

Post by Jeremy » Fri Mar 27, 2020 9:06 pm

Lovely work Phil!
Jeremy
1967 S1 4.2 FHC

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


288gto
Posts: 1355
Joined: Wed Nov 14, 2012 8:59 pm
Location: United Kingdom
Russia

#14 Re: Balance Link Springs

Post by 288gto » Fri Mar 27, 2020 9:55 pm

Very nice! :thumbsup:
Simon
1969 S2 OTS

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

User avatar

ETTony
Posts: 196
Joined: Sun Mar 27, 2016 6:36 pm
Location: Devon, England
Great Britain

#15 Re: Balance Link Springs

Post by ETTony » Wed May 27, 2020 3:41 pm

Just had a light bulb moment, maybe that is where my front rattle is coming from, if my springs are on the loose side of not quite tight enough :idea:
Tony in Devon
1967 Series 1, 4.2, OTS, RHD, Black.

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

User avatar

Topic author
Philk
Posts: 418
Joined: Wed Dec 07, 2016 7:48 am
Great Britain

#16 Re: Balance Link Springs

Post by Philk » Wed May 27, 2020 3:54 pm

ETTony wrote:
Wed May 27, 2020 3:41 pm
Just had a light bulb moment, maybe that is where my front rattle is coming from, if my springs are on the loose side of not quite tight enough :idea:
When the bonnet is locked down, the springs are under heavy tension and therefore will be tightly secured at each end on their retaining pegs. IMHO that is unlikely to cause a rattle.
Phil
1964 S1 3.8 OTS

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

User avatar

ETTony
Posts: 196
Joined: Sun Mar 27, 2016 6:36 pm
Location: Devon, England
Great Britain

#17 Re: Balance Link Springs

Post by ETTony » Fri Jun 05, 2020 11:52 am

Philk wrote:
Wed May 27, 2020 3:54 pm
ETTony wrote:
Wed May 27, 2020 3:41 pm
Just had a light bulb moment, maybe that is where my front rattle is coming from, if my springs are on the loose side of not quite tight enough :idea:
When the bonnet is locked down, the springs are under heavy tension and therefore will be tightly secured at each end on their retaining pegs. IMHO that is unlikely to cause a rattle.
You are so right, they are tight. :salute:
A few years ago on the RBCD up in Scotland, we all realised we all had rattles.
Still searching for rattle sources, as we all are :shrug:
Tony in Devon
1967 Series 1, 4.2, OTS, RHD, Black.

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

Post Reply Previous topicNext topic