I'm redoing brakes on a race car. I'm told the car has 'early 240' (1973? 1974?) brakes. I purchased new Girling rear calipers but what I received does not match what is on the car. The car's calipers have 7/16" mounting holes and a brake hose port with a raised center nipple. The new calipers have 10mm mounting bolts and a brake hose port with a smooth angled bottom profile. (see photos) The rear brake lines have two different brake line fittings on them. One end has a 3/8" fitting and the other end of the same line has a 10 mm fitting that joins an aftermarket T fitting on the rear axle. I am making up new brake lines and can use any fitting and create any flair that works. My questions are; 1. What is the correct diameter of brake line to use? 3/16", 1/4" or mm? 2. What is the correct flair type to use on the new calipers? Double 45 degree? Bubble? 3. Is there any reason why I shouldn't just drill out the caliper mounting holes from 10mm to 7/16" so that I can use the existing caliper mounting bracket? Please educate me on what brake lines, brake fittings and flairs were used on which year 240's. Which type of flair should I be using with each type brake line fitting? Thanks!
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Please educate me on early Girling rear calipers, fittings and brake line diameters
- Thread starter bjaspud
- Start date
Pietercc
Well-known member
- Joined
- Apr 5, 2019
- Location
- Stockton,CA
the 240 came on the market in 75, and from my knowledge should be all metric thread other than the lug nuts. You must have 140 brake calipers, and someone made some custom lines for it. Brake lines should be a m10x1.5 thread, with a bubble flair, IIRC
10 Pack - MALE TUBE NUTS - M10 x 1.5, Bubble Flare, 3/16" Line | eBay
Brake Hoses Unlimited - MALE TUBE NUT - M10 x 1.5, Bubble Flare, 3/16" Line. - M10 x 1.5, Bubble Flare, 3/16" Line. -- Double Flare and Bubble Flare. MALE TUBE NUT. Not what you need?. -- Zinc plated for corrosion resistance.
www.ebay.com
Helpful info thanks.the 240 came on the market in 75, and from my knowledge should be all metric thread other than the lug nuts. You must have 140 brake calipers, and someone made some custom lines for it. Brake lines should be a m10x1.5 thread, with a bubble flair, IIRC
10 Pack - MALE TUBE NUTS - M10 x 1.5, Bubble Flare, 3/16" Line | eBay
Brake Hoses Unlimited - MALE TUBE NUT - M10 x 1.5, Bubble Flare, 3/16" Line. - M10 x 1.5, Bubble Flare, 3/16" Line. -- Double Flare and Bubble Flare. MALE TUBE NUT. Not what you need?. -- Zinc plated for corrosion resistance.www.ebay.com
Pietercc
Well-known member
- Joined
- Apr 5, 2019
- Location
- Stockton,CA
You are correct, just checked my notes, sorry I didn't do that before. My search history showed me the wrong thing. My bad.
dl242gt
The world of the smiling Dogo
- Joined
- Jun 21, 2002
- Location
- S NJ, a suburb of Phila.
If you are in the US. Just get a set of ATE rear calipers and they will fit right on and be easy to make the metric line work because that is what 90percent of 240s have as rear brakes on US models. If you are overseas then I would try to get correct 240 calipers unless you want to modify what you have to fit.