ARP part no for head studs

you need to have the nut fully engaged plus one or two threads before you start torquing it down or your torque readings will be incorrect
 

krayn

Member
I used a 2 mm washer under the nut. This gave me over 1 thread out of the nut. After assembly there was just on 1 mm clearance to the cam gear.
 

bullstarz

New Member
I'm a few stages behind but i decided to tap the thread further down the hole. I use one of those endoscopes, that link up to the laptop, just to see what was going on down the hole. The thread only goes down half way, so I just used a set of m10 1.5 taps to take the thread down lower. Seems to have done the job.

Would like to machine the heads nut seats by a few mm, just on the two under the left cam wheels. That costs money though and you have to rely on some one else and wait for them.
 

krayn

Member
Good to hear its coming together. It pobably would be west to machine the heads. It does miss without doing this, but its close....
 

bullstarz

New Member
Did try to mill the heads myself but wasn't happy with the mill bit in the piiler drill, it wasn't very central. So the head is off to the machine shop to have about 3mm milled out. Just hope there is enough metal to spare. Only doing the two under the cam wheels on the left head as all the others seem fine.

Your right the was a bit of clearance but it was under 1mm, with one thread showing. Will fined some thinner washers as the ARP ones are thick and a bit of an over kill. They wound be fine if the head was torqued to 200 lbs but 60 lbs isn't that much.
 
Last edited:

XR8tt

Moderator
What do ARP recommend ?? I have 110 lb on ARP Dart block Ford .. I doubt an alloy block would take 200lb with 10mm ??? I would have thought 30lb and 90* ??
 

XR8tt

Moderator
Yep the last thing you want to do is pull the stud out of thread in block !! From memory they are fine thread in block .
 

bullstarz

New Member
yes the torque setting of the ARP is 60 ftlb, The washers though seem a bit of an overkill i would use them if the torque setting was 200 ftlb buy its not thats why i will be using a thinner washer.
 

bullstarz

New Member
All went together all right. Ended up having the left head machined by 3mm. That allowed the use of the ARP washers.

20130716170439.jpg

20130716165537.jpg

20130716165935.jpg

20130716170015.jpg

IMAG1056.jpg
 
Top