Impossible to find bolt size thread - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Brandon240sx · 02-20-2019, 11:12 AM

Does anyone know the size of the rocker arm bolts and the bolts for the camshaft hold down? My bolts seemed to have grown legs and walked away. I’ve searched all over, high and low and cannot find a thing. Searched numerous forums, searched all over google and nothing. Only thing I was able to find is a Nissan part number for the replacement rocker arm bolts (1305840F10)

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Brandon240sx · 02-20-2019, 11:13 AM

Quote:

Originally Posted by Brandon240sx

Does anyone know the size of the rocker arm bolts and the bolts for the camshaft hold down? My bolts seemed to have grown legs and walked away. I’ve searched all over, high and low and cannot find a thing. Searched numerous forums, searched all over google and nothing. Only thing I was able to find is a Nissan part number for the replacement rocker arm bolts (1305840F10)

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This is on a KA btw, forgot that piece of important info lol

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foreverdeath · 02-22-2019, 10:09 AM

I would assume m6x1.0 ~30mm. why not hit up a junkyard and steal on out of a pre 02 altima or pre 04 frontier?

Krusty_s13 · 02-22-2019, 11:37 AM

TYPICALLY, if a 10MM socket removes it, its a M6 bolt. Nissan religiously uses a 1.0 pitch.
I would compare it to what foreverdeath said, seems like it would be the right length.
M6 x 1.0 x 30MM

jumpman2334 · 02-22-2019, 01:17 PM

find some spare bolts you have laying around and try to thread them in. once you find the right one, measure it with a thread gauge to get the pitch. you can then run it though a die to see the shank dia (or take it to the hardware store with you and run it through their sizing guides).

as for the shank length, take your cap, put it on the cam, use the tail/end of a micrometer and determine the overall length. if its, say, 30mm, use a 25mm shank bolt.

if you dont have these tools. buy them. in the meantime, take your head to a local hardware store and try to thread some bolts in. most places are pretty cool about it if you arent dicking up their hardware.

02-20-2019, 11:12 AM	#1
Brandon240sx Zilvia Member Join Date: Aug 2017 Location: Long Island, NY Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	Impossible to find bolt size thread Does anyone know the size of the rocker arm bolts and the bolts for the camshaft hold down? My bolts seemed to have grown legs and walked away. I’ve searched all over, high and low and cannot find a thing. Searched numerous forums, searched all over google and nothing. Only thing I was able to find is a Nissan part number for the replacement rocker arm bolts (1305840F10) Sent from my iPhone using Tapatalk

02-22-2019, 11:37 AM	#4
Krusty_s13 Zilvia Addict Join Date: May 2008 Location: Miami, FL Posts: 879 Trader Rating: (0) Feedback Score: 0 reviews	TYPICALLY, if a 10MM socket removes it, its a M6 bolt. Nissan religiously uses a 1.0 pitch. I would compare it to what foreverdeath said, seems like it would be the right length. M6 x 1.0 x 30MM __________________ www.garage-emperor.com

02-22-2019, 10:09 AM	#3
foreverdeath Zilvia Junkie Join Date: Sep 2012 Location: va beach Age: 31 Posts: 321 Trader Rating: (3) Feedback Score: 3 reviews	I would assume m6x1.0 ~30mm. why not hit up a junkyard and steal on out of a pre 02 altima or pre 04 frontier?

02-22-2019, 01:17 PM	#5
jumpman2334 Zilvia FREAK! Join Date: Jan 2010 Location: SHOW ME WHAT YOU GOT Posts: 1,115 Trader Rating: (1) Feedback Score: 1 reviews	find some spare bolts you have laying around and try to thread them in. once you find the right one, measure it with a thread gauge to get the pitch. you can then run it though a die to see the shank dia (or take it to the hardware store with you and run it through their sizing guides). as for the shank length, take your cap, put it on the cam, use the tail/end of a micrometer and determine the overall length. if its, say, 30mm, use a 25mm shank bolt. if you dont have these tools. buy them. in the meantime, take your head to a local hardware store and try to thread some bolts in. most places are pretty cool about it if you arent dicking up their hardware.