EGR tube thread size - Infamous Nissan

smith · 03-02-2022, 03:10 AM

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?

smith · 03-02-2022, 05:15 PM

I don't know much about bolts but I think I'm asking about thread pitch.

Stinky · 03-04-2022, 05:14 PM

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).

Cusser · 03-05-2022, 03:09 PM

Quote:

Originally Posted by Stinky

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

smith · 03-06-2022, 02:23 AM

Thanks for clearing this up for me. Next project is to get those threads straight.

03-02-2022, 03:10 AM	#1
smith Join Date: Feb 2020 Location: Arizona Posts: 62 Vehicle: 93 nissan d21 2WD KA24E Manual Thanks: 12 Thanked 2 Times in 2 Posts	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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03-02-2022, 05:15 PM	#2
smith Join Date: Feb 2020 Location: Arizona Posts: 62 Vehicle: 93 nissan d21 2WD KA24E Manual Thanks: 12 Thanked 2 Times in 2 Posts	I don't know much about bolts but I think I'm asking about thread pitch.

03-04-2022, 05:14 PM	#3
Stinky Join Date: Nov 2019 Location: Whitewater, CO Posts: 128 Vehicle: 86 2wd 720, 86 4x4D21 Thanks: 0 Thanked 12 Times in 12 Posts	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).

03-06-2022, 02:23 AM	#5
smith Join Date: Feb 2020 Location: Arizona Posts: 62 Vehicle: 93 nissan d21 2WD KA24E Manual Thanks: 12 Thanked 2 Times in 2 Posts	Thanks for clearing this up for me. Next project is to get those threads straight.