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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-12-2020, 11:56 PM | #1 |
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Exhaust bolt torque specs?
Hi, I'm going to be putting my stock catback back on. Just wondering if anyone knows the torque specs for the bolts.
Looking for the following. Muffler to Midpipe torque specs Midpipe to front pipe torque specs Thanks. |
The Following User Says Thank You to Phuviano For This Useful Post: | humfrz (07-13-2020) |
07-13-2020, 01:34 AM | #2 | |
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If it leaks, it wasn't tight enough; if the nut strips the threads on the bolt/stud, it was too tight. * taken from Bubba's guide to wrenching. |
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07-13-2020, 02:18 AM | #3 | |
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The Following User Says Thank You to Phuviano For This Useful Post: | humfrz (07-13-2020) |
07-13-2020, 02:51 AM | #4 |
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OK, OK, I called Bubba at his shop and ask him to put a exhaust stud in his vise and screw down a nut on it with the torque wrench he only uses to torque head bolts and to tighten the nut down "old muffler bolt tight" and tell me what the reading on top of the torque wrench was.
He did that and told me it was 25 ft. lbs. Now, I don't know how many beers ol Bubba has had tonight, but there is a torque value for you. |
07-13-2020, 06:23 AM | #5 |
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From the shop manual.
Tightening torque (Exhaust manifold sub-assembly): 30 N·m (3.1 kgf-m, 22.1 ft-lb) Tightening torque (Exhaust pipe sub-assembly FR): 35 N·m (3.6 kgf-m, 25.8 ft-lb) Tightening torque (Exhaust pipe assembly CTR): 18 N·m (1.8 kgf-m, 13.3 ft-lb) Tightening torque (Exhaust pipe assembly FR): 42.5 N·m (4.3 kgf-m, 31.3 ft-lb) Tightening torque (Bolts securing bracket of exhaust pipe assembly FR): 50 N·m (5.1 kgf-m, 36.9 ft-lb |
07-13-2020, 07:13 AM | #6 | |
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Does CTR stand for center? If so, then what does FR mean? |
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07-13-2020, 07:40 AM | #7 |
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22 header
32 overpipe 13 on the spring bolts 37 on the hanger bolt. It would appear that in the shop manual "FR" is the over pipe and "CTR" is what we would call the front pipe. |
The Following User Says Thank You to Gloonge For This Useful Post: | Phuviano (07-13-2020) |
07-13-2020, 11:39 AM | #8 | |
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But figured it out. It is front to rear. Thanks again for the info. |
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07-13-2020, 03:18 PM | #9 |
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