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Common Honda Bolt thread pitch size dimension

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Old 02-23-2007, 01:25 PM   #26
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Default Re: Common Honda Bolt thread pitch size dimension (JCracer723)

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Originally Posted by JCracer723

im thinking:
M8-1.25 (common) (probably most of our 12mm head bolts)
Thanks a ton- I was thinking it was M8 by the standard 1.25 but wanted to double check. Cant wait to machine some spacers on the lathe
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Old 02-23-2007, 01:34 PM   #27
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Because I'm down there right now ....

Front LCA Bolts:

Subframe flange bolt: 14x1.5mm
Bushing bracket flange bolt: 14x1.5mm
Bushing nut: 14x1.5mm
Shock fork lower bolt: 12x1.25mm
Shock fork upper bolt: 10x1.25mm
Swaybar endlink nuts: 8x1.25mm
Swaybar bushing bolts: 8x1.25mm
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Old 02-23-2007, 01:42 PM   #28
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Default Re: (Eran)


This is exactly the info i needed to clean all the threads on my block when i get it back from the machine shop. Now all i need is a Tap and Die set.
Does anyone know what size are the bolts that bolt down the Main caps on a 93 LS motor?

I vote Sticky
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Old 03-02-2007, 10:28 AM   #29
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Hey guys- I was looking around and found this site- pretty good stuff on it

http://www.boltdepot.com/faste....aspx



Im placing a order right now for some stuff. They have honda clips and fasteners too.
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Old 03-06-2007, 12:12 PM   #30
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Default Re: Common Honda Bolt thread pitch size dimension (Bense)

edited + cleaned up
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Old 03-06-2007, 12:24 PM   #31
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Default Re: Common Honda Bolt thread pitch size dimension (Bense)

Great information for some extra security measures. I'm sure it would seriously hinder how long it would take a thief to strip a car!
http://www.mcgard.com/security/intimidator.asp
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Old 03-23-2007, 07:43 AM   #32
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Default Re: Common Honda Bolt thread pitch size dimension (D50boy)

Anyone have the thread size for the port on the i'/m side of the head used for ls/vtec?
I need to hook up a oil pressure sending unit after the filter.

TIA
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Old 03-23-2007, 09:04 AM   #33
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Default Re: Common Honda Bolt thread pitch size dimension (TrueNorthStar)

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Originally Posted by TrueNorthStar
Anyone have the thread size for the port on the i'/m side of the head used for ls/vtec?
I need to hook up a oil pressure sending unit after the filter.

TIA
3/8" BSPT, but I usually retap it for 3/8" NPT and use a 3/8" NPT plug.
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Old 03-23-2007, 10:38 AM   #34
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Default Re: Common Honda Bolt thread pitch size dimension (IN VTEC)

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Originally Posted by IN VTEC
3/8" BSPT, but I usually retap it for 3/8" NPT and use a 3/8" NPT plug.
I remeber reading somewhere that it was a 3/8npt but couldn't understand why honda would choose to use a npt thread on that one plug vs. the rest of the bspt threads they use on the rest of the engine.

I can't tap it out (still on a running engine) so I guess I will get an adapter for it.

Thanks!
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Old 03-23-2007, 04:45 PM   #35
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Default Re: Common Honda Bolt thread pitch size dimension (TrueNorthStar)

M18X1.5 O2 Sensor Bung
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Old 03-23-2007, 05:43 PM   #36
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Default Re: Common Honda Bolt thread pitch size dimension (TrueNorthStar)

I thread gauged the port one time and it is metric thread (BSPT). The NPT thread is only different by 1 thread per inch.
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Old 05-03-2007, 09:57 AM   #37
 
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Default Re: Common Honda Bolt thread pitch size dimension (IN VTEC)

How big are the bolts that hold your radius rod to the LCA?

M14?

Need to re-tap that hole, its chewed
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Old 05-03-2007, 11:07 AM   #38
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Default Re: Common Honda Bolt thread pitch size dimension (W O T)

M12x1.25, same as all of the other 17mm head suspension bolts.
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Old 05-03-2007, 11:48 AM   #39
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Default Re: Common Honda Bolt thread pitch size dimension (IN VTEC)

Quote:
Originally Posted by IN VTEC
I thread gauged the port one time and it is metric thread (BSPT). The NPT thread is only different by 1 thread per inch.
yikes, just enough to chew the threads right out.

GREAT info thread guys, yet another .html save on my HD thanks to H-T
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Old 05-04-2007, 07:54 AM   #40
 
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Default Re: Common Honda Bolt thread pitch size dimension (IN VTEC)

I dont believe its an m12 X 1.25 for the lca bolt

the thread is to fine
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Old 05-04-2007, 09:42 AM   #41
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Default Re: Common Honda Bolt thread pitch size dimension (W O T)

Says it in the suspension diagram. Any Honda suspension bolt with a 17mm head is a M12x1.25. The rear trailing arm bushing bolts are the same thread size and pitch.
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Old 05-04-2007, 09:43 AM   #42
 
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Default Re: Common Honda Bolt thread pitch size dimension (IN VTEC)

Its to fine of a thread for 1.25, Im going to honda right now since knwone here has them
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Old 05-04-2007, 09:47 AM   #43
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Default Re: Common Honda Bolt thread pitch size dimension (W O T)

Where has this thread been all my life
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Old 05-06-2007, 10:37 AM   #44
 
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Default Re: (Bense)

Come on man! If it's 13mm it's a 1/2" SAE fastner.
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Old 05-06-2007, 11:12 AM   #45
 
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OK guys and girls I copied all of the bolt spec's listed in the previous posts to have them in one place. I can't vouch for the correctness, but here they are.

M6-1.0 --- common (most of our 10mm head bolts)
M8-1.25 -- common (probably most of our 12mm head bolts)
M10-1.25 - some headbolts) (probably most of our 14mm head bolts)
M11x1.5 -- some headbolts)
M12x1.0 -- flywheel bolts + shift fork ball spring bolts)
M12-1.25 - common (probably most of our 17mm head bolts)
M12-1.5 -- lugnuts)
M14-1.25 - crank bolt?)
M14-1.5 -- oil pan drain plug. 19mm head bolt that connects rear trans bracket to trans
M16-???
M20x1.0 -- 10mm allen bolt
M20x1.5 (oil filter threads????)
M22x??? d-series countershaft nut
M28x1.5 - 14mm allen bolt

Flywheel bolts (B and D the same, dont know about H and K): M12 x 1.0
Pressure Plate bolts (same b and d dont know about h and k): M8 x 1.25
Oil pan/Trans drain plug: M14 x 1.5
Trans case bolts that hold that little ball bearing in place with spring: M12 x 1.0 (oddly enough this is a hard tap to find, and timesert hasnt even made an insert for it yet so dont screw this one up)
Oil Pressure Sensor (back of block): 1/8 - 28BSP
Bumper screw/bolts: M6 x 1.0
Crank Bolt: M14 x 1.25
14mm Allen Bolt: M28 x 1.5
10mm Allen Bolt: M20 x 1.0
19mm bolt that connects rear trans bracket to trans: M14 x 1.5

D-series head stud thread: M10x1.25
B-series head stud thread: M11x1.5


Also, if it's an unusual thread, like the oil filter for example, Please put it like this
M20x1.5 (oil filter threads)

M12 x 1.25 - rear inner seat rail bolt

M10x1.5 - Shifter (for all you poor saps that need a locknut for your
Type-R ****)

Front LCA Bolts:

Subframe flange bolt: 14x1.5mm
Bushing bracket flange bolt: 14x1.5mm
Bushing nut: 14x1.5mm
Shock fork lower bolt: 12x1.25mm
Shock fork upper bolt: 10x1.25mm
Swaybar endlink nuts: 8x1.25mm
Swaybar bushing bolts: 8x1.25mm

M18X1.5 O2 Sensor Bung

How big are the bolts that hold your radius rod to the LCA?
A. M12x1.25, same as all of the other 17mm head suspension bolts.
Says it in the suspension diagram. Any Honda suspension bolt with
a 17mm head is a M12x1.25. The rear trailing arm bushing bolts are
the same thread size and pitch.

M16 is for the thermoswitch,under the water pipe.
I never tried a crank pulley bolt to see if it fits.
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Old 05-10-2007, 09:45 PM   #46
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Default Re: (Batmite)

Anyone know the thread and pitch of the coolant port in a B series head next to the water neck. I think its M19x1.0?

[email protected]
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Old 05-14-2007, 02:58 PM   #47
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what bolts would i need to bolt on a b series tranny to the block? im taking a wild guess, is it a m14 x1.5 ?
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Old 05-15-2007, 06:45 AM   #48
 
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Default Re: (JerseySiPOS)

oil pressure sensor on back of block 1/8 BSPT

maybe try to compile all of these sizes into the first post, by drivetrain, suspension components, etc.

that would help a ton so people dont have to search all over.
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Old 05-24-2007, 08:55 PM   #49
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Default Re: (dfoxengr)

yaeh we should get a list as a sticky or something.. just not so many question marks after the bolt size
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Old 06-01-2007, 06:07 PM   #50
 
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Default Re: (RedEj8)

Quote:
Originally Posted by RedEj8
.
LOL!
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