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Hi all. I'm needing to clean out my head stud holes in my cylinder block and looking for an M12 tap to use. With There being so many types I'm not sure which one I need, I know it will be an M12, but then what pitch is needed? 1.0,1.25, 1.5, 1.75 pitch. Also what type of tap would I use?

Amy links would be great.

Many thanks.

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You do not mention what engine your car has but VagCat shows that Mk 3 cylinder head bolts are actually M11 x 1.5 x 96 with a socket type head............ does this sound right,  are you sure about the M12 bit?

 

Taps come in two types, taper and plug.  As the name  suggests, a taper tap is tapered and will not clean threads right to the bottom of a hole so a plug tap would probably be a better bet.

 

Both types are readily available on e-bay, just do a search for M11 x 1.5 taps.

 

 

Link below for cylinder head bolts ............ M11 x 1.5 x 96

 

http://www.ebay.co.uk/itm/VW-GOLF-MK1-MK2-MK3-CADDY-SCIROCCO-CYLINDER-HEAD-BOLT-SET-050103384S-A458-/191133016196

Edited by leon263
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Yeah, just checked VagCat.  20 bolts required for the VR6, all M11 x 1.5 but there are three different lengths included in the set ............ 85, 119 and 144mm

 

 

 

 

Link below,

 

 

http://www.ebay.co.uk/itm/Bolt-Kit-Cylinder-Head-02082-Febi-VW-Ford-Seat-/331583784567?pt=LH_DefaultDomain_3&fits=Model%3AGolf%7CCars+Type%3A2.8+VR6&hash=item4d33ef0677

Edited by leon263
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