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Old 04-17-2016, 12:07 PM
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Riser bolt question

The riser gasket kit I get from DIM comes with standard hardware and no washer. My buddie who is a fabricator got me a neat little bolt bin stocked with grade 8 hardware. When he saw my inferior riser bolts he insisted I use the grade 8 stuff with the nice heavy washer.

What say TT?
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Old 04-17-2016, 12:08 PM
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Old 04-17-2016, 12:45 PM
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I would have added some washers but I think grade 8 is way overkill for riser bolts
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Old 04-17-2016, 02:57 PM
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Quote:
Originally Posted by CantRepeat View Post
I would have added some washers but I think grade 8 is way overkill for riser bolts
Maybe, maybe not. I would at least use 5. The higher grade bolts will be more resistant to several heat cycles without loosening. I also think a washer would be a good addition though.
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Old 04-17-2016, 04:23 PM
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add the washer... 30ft/lb torque - no need for a grade 8
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Old 04-17-2016, 05:04 PM
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Quote:
Originally Posted by paco_06 View Post
Maybe, maybe not. I would at least use 5. The higher grade bolts will be more resistant to several heat cycles without loosening. I also think a washer would be a good addition though.
Bolt grade has nothing to do with loosening. That is some serious miss information right there. It's more about torque and seat pressure tbh.

From the factory I think there were just heat treated mild steel hex head bolts. If your exhaust is getting that hot you have other issues. Grade 5 is overkill as well. I had my 92 for 14 years and never had an issue with the factory bolts.
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Last edited by CantRepeat; 04-17-2016 at 10:11 PM.
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Old 04-17-2016, 06:18 PM
uplander uplander is offline
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Mine have lock washers on them, just wondering if the old bolts had them. you might want to check

just curious what is the ball valve under the exhaust manifold, is that running a heater or shower
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Old 04-17-2016, 06:27 PM
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I went with stainless and lock washers
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Old 04-17-2016, 07:01 PM
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I like the idea of stainless but I wonder how it will handle the cast iron material with the threads. There is a reason they used the type of bolts they put in, two different types of metal can cause issues with threads.
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Old 04-18-2016, 12:20 AM
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I like the idea of stainless but I wonder how it will handle the cast iron material with the threads. There is a reason they used the type of bolts they put in, two different types of metal can cause issues with threads.
Use some anti-sieze and they will be fine with dissimilar metals.
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