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Old 03-02-2022, 03:10 AM   #1
smith
 
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Default EGR tube thread size

My EGR tube is a problem. On the exhaust manifold side the threads look good but won't go all the way in. It does go in quite a bit but I think the hole needs to be chased. I see here at Infamous that it's a 24M X 1.5 bolt hole but is it a fine thread or what?
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Old 03-02-2022, 05:15 PM   #2
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I don't know much about bolts but I think I'm asking about thread pitch.
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Old 03-04-2022, 05:14 PM   #3
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Metric is not refernced as being fine or course thread.

That translates to 24mm w.a thread pitch of 1.5 mm to the ? (Not sure). But, it translates to a fine pitch.

In standard thread, a 1/4-20 bolt has an OD of 1/4" and a thread pitch of 20 threads to the inch....exact same thing, only different (the unit that is used to compare thread pitch is in metric).
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Old 03-05-2022, 03:09 PM   #4
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Quote:
Originally Posted by Stinky View Post
Metric is not referenced as being fine or course thread.

Metric: for example 24mm with a thread pitch of 1.5mm would be 1.5mm between the threads.


Common metric bolt/nut threads start with 6.0mm x 1.0mm, and 8.0mm x 1.25mm
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Old 03-06-2022, 02:23 AM   #5
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Thanks for clearing this up for me. Next project is to get those threads straight.
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