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Need help, rear swap, brake hose issue

Old 12-18-2018, 09:42 AM
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Need help, rear swap, brake hose issue

Swapped out my trashed 9 bolt (rear disc) to a 97 10 bolt from a formula. Iíve tried 3 different brake hoses (rear center) and none of them work. The problem is connecting the hose to the hard line that runs to the front, they are threaded different. The hose end is too big.

this is the hose I need. So far Iíve tried a 97 hose, an 88 hose, and another 88 hose of a different brand.
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Old 12-18-2018, 07:07 PM
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Re: Need help, rear swap, brake hose issue

All 3 of those hoses would have the same M12 x 1.0 female iso female bubble flare which is what should be on your car unless someone has changed the hard line. If it has been replaced it and M12 is too large it could be a M10 x 1.0 or even converted to SAE with a 3/8 -24 I.F. or 7/16-20 I.F. Do you know what diameter the steel pipe is? 3/16 would carry a 3/8 threaded adapter most likely and 1/4 diameter would carry a 7/16 threaded adapter.

82-82 cars had SAE lines and 84-92 had metric...you did not mention what year the car was but if the 9 bolt was original it would be a metric car.
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Old 12-19-2018, 11:49 AM
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Re: Need help, rear swap, brake hose issue

I have no idea if the rear is original but itís an 88 sport coupe so it doesnít seem like it would be.

FYI I was able to cap the long hard line at the back (axle side) with a pipe thread cap. Iím not too familiar with pipe thread but it came from a bin labeled as 1/8.

Ill take some pics this evening and update the thread because it appears someone has been here before because there are a few brass fittings that donít look like they came from the factory.
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Old 12-22-2018, 04:22 PM
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Re: Need help, rear swap, brake hose issue

So I checked my parts car and it has a completely different hard line that runs from master cyl to rear end. This hard line works. I guess the 9 bolt cars used a different hard line from front to rear. Either way, problem resolved
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