Honda and Acura Technical Forums

02-23-2007, 02:25 PM

Quote:

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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Eran · 02-23-2007, 02:34 PM

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

XkjeldorX · 02-23-2007, 02:42 PM

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

03-02-2007, 11:28 AM

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.

Bense · 03-06-2007, 01:12 PM

edited + cleaned up

D50boy · 03-06-2007, 01:24 PM

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

TrueNorthStar · 03-23-2007, 08:43 AM

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

IN VTEC · 03-23-2007, 10:04 AM

Quote:

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.

TrueNorthStar · 03-23-2007, 11:38 AM

Quote:

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!

stumpyf4 · 03-23-2007, 05:45 PM

M18X1.5 O2 Sensor Bung

IN VTEC · 03-23-2007, 06:43 PM

I thread gauged the port one time and it is metric thread (BSPT). The NPT thread is only different by 1 thread per inch.

W O T · 05-03-2007, 10:57 AM

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

M14?

Need to re-tap that hole, its chewed

IN VTEC · 05-03-2007, 12:07 PM

M12x1.25, same as all of the other 17mm head suspension bolts.

89s1 · 05-03-2007, 12:48 PM

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

W O T · 05-04-2007, 08:54 AM

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

the thread is to fine

IN VTEC · 05-04-2007, 10:42 AM

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.

W O T · 05-04-2007, 10:43 AM

Its to fine of a thread for 1.25, Im going to honda right now since knwone here has them

B16b-EJ8 · 05-04-2007, 10:47 AM

Where has this thread been all my life

Batmite · 05-06-2007, 11:37 AM

Come on man! If it's 13mm it's a 1/2" SAE fastner.

Batmite · 05-06-2007, 12:12 PM

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 knob)

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.

mattminer · 05-10-2007, 10:45 PM

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?

M@

b20beast978 · 05-14-2007, 03:58 PM

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 ?

dfoxengr · 05-15-2007, 07:45 AM

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.

slo90si · 05-24-2007, 09:55 PM

yaeh we should get a list as a sticky or something.. just not so many question marks after the bolt size

phoebs · 06-01-2007, 07:07 PM

Quote:

Originally Posted by RedEj8

.

LOL!

02-23-2007, 02:34 PM	#27
Eran HT White Ops Join Date: Mar 2006 Location: Ness abandoned the cookie. Posts: 14,247	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 __________________ Jason -- 97 VSM del Sol <2WAYPARADISE> Proclivity to Hatership [ Flickr. ][ anti\|hero ][ dSoc ]

02-23-2007, 02:42 PM	#28
XkjeldorX Junior Member Join Date: Aug 2004 Posts: 951	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

03-02-2007, 11:28 AM	#29
vestalfootball72 Guest Posts: n/a	Re: (XkjeldorX) 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.

03-06-2007, 01:12 PM	#30
Bense Moderator Join Date: Mar 2003 Location: Clemson, South Carolina! Posts: 9,217	Re: Common Honda Bolt thread pitch size dimension (Bense) edited + cleaned up __________________ http://people.clemson.edu/~ABense

03-06-2007, 01:24 PM	#31
D50boy Member Join Date: Mar 2003 Location: Austin/Bastrop, TX, USA Posts: 1,280	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 __________________ '99 B18C5 Civic Hatchback- for fun '08 L15A Fit Hatchback- for the wife

03-23-2007, 08:43 AM	#32
TrueNorthStar Member Join Date: Jan 2003 Location: Los Angeles, Ca., USA Posts: 1,093	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 __________________ *R.I.P. Earl Laskey* Laskey Racing Engines http://images.honda-tech.com/set1/smile/emthup.gif http://images.honda-tech.com/set1/smile/emthup.gif http://www.laskeyracing.com

03-23-2007, 05:45 PM	#35
stumpyf4 Member Join Date: Jul 2002 Location: Mrs. Sauga, Ontario, Canada Posts: 1,304	Re: Common Honda Bolt thread pitch size dimension (TrueNorthStar) M18X1.5 O2 Sensor Bung __________________ Great Vendor Experiences: LSD Motorsports, Lightning Motorsport, Innes Performance Group, VS Racing. Poor Vendor Experience: Kteller

03-23-2007, 06:43 PM	#36
IN VTEC Member Join Date: Jan 2000 Location: Bloomington, IN, USA Posts: 9,429	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. __________________ XBL: Dr Eugh For Sale: http://hondamarketplace.com/zerothread?id=1810378

05-03-2007, 10:57 AM	#37
W O T Join Date: Nov 2004 Posts: 1,718	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

05-03-2007, 12:07 PM	#38
IN VTEC Member Join Date: Jan 2000 Location: Bloomington, IN, USA Posts: 9,429	Re: Common Honda Bolt thread pitch size dimension (W O T) M12x1.25, same as all of the other 17mm head suspension bolts. __________________ XBL: Dr Eugh For Sale: http://hondamarketplace.com/zerothread?id=1810378

05-04-2007, 08:54 AM	#40
W O T Join Date: Nov 2004 Posts: 1,718	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

05-04-2007, 10:42 AM	#41
IN VTEC Member Join Date: Jan 2000 Location: Bloomington, IN, USA Posts: 9,429	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. __________________ XBL: Dr Eugh For Sale: http://hondamarketplace.com/zerothread?id=1810378

05-04-2007, 10:43 AM	#42
W O T Join Date: Nov 2004 Posts: 1,718	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

05-04-2007, 10:47 AM	#43
B16b-EJ8 Member Join Date: Apr 2006 Location: Relocating, usa Posts: 1,620	Re: Common Honda Bolt thread pitch size dimension (W O T) Where has this thread been all my life __________________ WTB: Complete AC for an EJ8

05-06-2007, 11:37 AM	#44
Batmite Join Date: Apr 2007 Location: Houston, Texas, USA Posts: 8	Re: (Bense) Come on man! If it's 13mm it's a 1/2" SAE fastner.

05-06-2007, 12:12 PM	#45
Batmite Join Date: Apr 2007 Location: Houston, Texas, USA Posts: 8	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 knob) 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.

05-10-2007, 10:45 PM	#46
mattminer Junior Member Join Date: Dec 2004 Posts: 107	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? M@

05-14-2007, 03:58 PM	#47
b20beast978 Member Join Date: Mar 2007 Location: Eastern, Ma, USA Posts: 1,703	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 ? __________________ Project .D RLZ Engineering http://images.honda-tech.com/set1/smile/emthup.gif //Combustion Contraption http://images.honda-tech.com/set1/smile/emthup.gif // RMF http://images.honda-tech.com/set1/smile/emthup.gif My vouch thread http://www.honda-tech.com/zerothread?id=2262092 http://images.honda-tech.com/set1/smile/emthup.gif

05-15-2007, 07:45 AM	#48
dfoxengr Join Date: May 2002 Location: banned NC Posts: 0	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.

05-24-2007, 09:55 PM	#49
slo90si Junior Member Join Date: Dec 2005 Location: phoenix, Az, US Posts: 54	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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