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**stevejgreen** · 25-11-12, 11:04 PM

Re: a french marlin owner needs your help

First have a read of http://www.cjw-consulting.co.uk/frontbrakes/brakes.htm for a full guide to recondition your calipers.

From the picture above it looks as if your Tie Rod Bushes are in poor condition.

Replacements are available from http://superflex.co.uk/products.php?cat=234 They will improve the handling of the car especially if you also change the Eyebolt Bush.

For a guide on rebuilding the Marina Front Suspension read http://homepages.vodafone.co.nz/~fou...suspension.htm
Most of the information is correct for a Marlin, but the Marina Shock absorber is replaced by a Classic Mini Top Arm and a Triumph Herald Rear Shock absorber.

**b_caswell** · 28-11-12, 06:07 PM

Re: a french marlin owner needs your help

QUOTE:-First have a read of http://www.cjw-consulting.co.uk/frontbrakes/brakes.htm for a full guide to recondition your calipers.

AH the good old "should you split the caliper controversy"(provoquer une controverse) Good advise!! Yes or No??

**stevejgreen** · 28-11-12, 06:32 PM

Re: a french marlin owner needs your help

Too late, Darcphil34 has already split them.

The critical point is that if the O'rings are damaged or lost they must be replaced with others compatible with brake fluid.
Otherwise provided everthing is kept clean, there should be no problem.

**Robert in Cumbria** · 28-11-12, 07:20 PM

Re: a french marlin owner needs your help

Another way of encouraging the pistons out of the calliper without splitting them is to use a grease gun with the nipple connector removed, I ended up having to do that with one calliper on my hybrid Roadster, fitted with Triumph type 12 callipers. Two pistons were rock solid. I still split the calliper to enable thorough cleaning once I had removed the pistons. Obviously one piston moves first and the more seized piston remains but by jamming the loose piston with a piece of steel the second piston starts to move. This can only be done before splitting the calliper.

I would try to ensure the pairs don't get mixed up, but I suspect they aren't matched during production, there are no direct mechanical running parts involved. I feel the voodoo surrounding splitting callipers is more to do with not wanting amateurs splitting the calliper on the car and not reassembling it properly. The bolts definitely need torquing up.

The condition of the bore isn't as critical as the piston, the two should never touch. The piston is chromed to ensure a very good sliding seal. An option is to use stainless pistons but the Triumph callipers I stripped were ok after 30 odd years? I don't feel the need to better that.

**cameronfurnival** · 28-11-12, 08:33 PM

Re: a french marlin owner needs your help

I used to split triumph calipers fairly frequently but was told it was a bad idea because the bolts stretched under torque so you had to use brand new bolts - has anyone else heard that?

**Robert in Cumbria** · 28-11-12, 10:42 PM

Re: a french marlin owner needs your help

All bolts stretch under normal load at the standard torque for the size and quality of bolt Cameron, that's how they work. They act like a linear spring to hold the two components together, rather like an elastic band. The problem arrises when you over torque the bolt past the yield point and deform it, which was why I suggested it's important to use a torque wrench to avoid over tightening. Springs tend to keep their shape unless they are over loaded. It's easy to tell if a bolt has been over loaded beyond it's yield point by measuring the diameter along the length with a digital calliper or micrometer, if the diameter is reduced at one point (necked) especially in the threaded portion then the bolt has deformed (stretched too far) and is scrap.

You can tell if you have gone too far tightening a bolt because it gradually gets easier to tighten as it yields, because the diameter has reduced, it's necked and and will snap very easily soon after.

**b_caswell** · 28-11-12, 11:44 PM

Re: a french marlin owner needs your help

So who knows what the torque figures are??

**mark kessell** · 29-11-12, 06:58 AM

Re: a french marlin owner needs your help

Hi all, if cost is not too much of a issue, I recently purchased reconditioned units from local motor factors for £35 each, there are Delphi boxed.
my car has been off the road for almost 12 years, and I am if the middle of a complete ground up rebuild. The reconditioned unit I purchased are like new....

**Robert in Cumbria** · 29-11-12, 07:52 AM

Re: a french marlin owner needs your help

It can be calculated.

Methods of Tightening Threaded Fasteners

http://www.boltscience.com/pages/tighten.htm

Strength of Threaded Fasteners

http://www.boltscience.com/pages/strength.htm

There is a load of very good info on the Bolt Science site and I believe it has high integrity. You can't make that stuff up. I have used the site for years. I will measure a bolt later when it comes light. I seem to remember they are 7/16" by 20 TPI (UNF), they have three radial lines indicating SAE grade 5, roughly the same our grade 'R' 45-55 Tons/Sq inch, so the torque would be about 50 to 55 Lb/ft.

Confirm, 5/8" bolt head so will be 7/16 UNF as thought. Brrr it's frosty out there!

http://www.imperialsupplies.com/pdf/A_FastenerTorqueCharts.pdf

Torque value chart.jpg

Originally posted by b.caswell View Post

So who knows what the torque figures are??

**stevejgreen** · 29-11-12, 09:22 AM

Re: a french marlin owner needs your help

Are we in danger of forgetting that our French member, Philippe, is located in Southern France around 70 miles from the Spanish border, with access to standard Marina/Triumph parts quite restricted, many of the rules that apply here is the UK are not necessarily followed quite so religiously.

All the above points are true and valid in an ideal environment where parts can be delivered 'next day'.

**cameronfurnival** · 29-11-12, 10:15 AM

Re: a french marlin owner needs your help

I would be willing to take a trip down that way

if someone pays of course

**Peterx** · 29-11-12, 12:32 PM

Re: a french marlin owner needs your help

Brakes International (http://www.brakeparts.co.uk/delivery.php) will deliver to France and I've used them here in the UK and they are very good.

Perhaps someone (maybe Steve?) can help Philippe by choosing the right part numbers on their website? (As I don't have a clue about Marina's). He will have to phone them to order as it says you can't use the web ordering for outside the UK.

If you find the right caliper and then click on the 'Associated Parts' it gives you all the small service items listed separately.

Just one option that may help?

...peter

**Darcphil34** · 29-11-12, 09:07 PM

Re: a french marlin owner needs your help

Hello all of you

Thank you for your help, it gives me great pleasure
and the best is j have to revise my English every day
this is a decidedly Marlin Happiness.
before ordering brake parts, I want to check the master cylinder.
Has one of you already found a way to "stretch" the available space for the legs :
I can not drive my to short Marlin :
-back seat by cutting the frame around the bridge?
-back all pedals lengthening the frame?
Thanks for your help

**stevejgreen** · 29-11-12, 10:22 PM

Re: a french marlin owner needs your help

There are several different master cylinders.
It shoud be possible to identify yours from a photograph.

Yours should be a dual circuit type.
My preference would be to use Past Parts in the UK. http://www.pastparts.co.uk/
They should be able to replace te seals, or to refurbish your existing brake master cylinders.

They can also exchange brake calipers.

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