1. The stud did not bottom out, it was not set all the way down.

2. I blew out all of the coolant when I removed the head from the block and thread chased with a TTY bolt/blew out the holes before the first HG install sequence , Dusty did it the second time just as i did the first.

3. The block could be crap and so could the machined heads.


I dont believe it would be fair to the ARP vs TTY bolts argument with my situation as one side is perfectly fine and they removed 010 from the head and the one that leaks was .008
I did not know the PO but what i do know is everything he did to the rover was bassackwards.

What was found when tearing it apart was that the lower intake manifold was hand tight on some spots
The coil pack on the passenger side was from a junk yard as it had their marking on it.

 

If it gets to it i will, ill know later today.

 

It's weird the nut went down to the non threaded part of the stud... Did I get that right? Sounds like the nut pulled its way out of the block. Pull the nut and stud out and put a little pressure on the system and see if the hole fills up with coolant.

 

Yes, you got it right. Nut tried to cut new threads on non threaded section of studs

 

It seems strange that ARP shorted on the length of threads on the studs or they weren't screwed right into the block totally.

Were the studs screwed into the block before the heads were mounted?

If the heads were skimmed by .008 and .010 respectively that miniscule amount shouldn't affect the length of the threaded portion of the studs as they should be at least 2-3 threads longer than with the head in place plus a washer and plus the nut. Maybe the heads had been previously skimmed which has maybe caused the issue, just a thought.

Are the studs hardened and tempered? and was it done after or before threading? they must be at the very least 8.8's or even far higher spec, maybe 10's or 12's

If it's only 1 stud that's the real issue and you think you can achieve an HG seal grind the SOB down .025 at the block end and rechase the thread.

 

I am almost 100% sure that the heads had been done before. i put in a second washer on the rest of the studs and i could tell there was a huge difference in torquing them down the first go around and the second. also when i removed the nut on some, it disnt take much pressure to get them off.

 

looks like i will be buttoning it all up tomorrow and seeing what happens. it held 18 psi after having to fix some hose clamp leaks and the radiator after a mishap with the power steering pump.

Thanks go out to Dusty for all the help provided!

 

awesome
Soooo crazy that the stud threads didn't reach

 

i think if you check the measures again the LR assembly manual you will find that head was cut too much and it is not a problem with the studs just not enough meat left for the head to clamp down.

 

I'm sure that's it but none the less I wonder if the rover set might have more thread length than the 215 set