Project Astrid
#201
350Z-holic
iTrader: (13)
I would see what ARP makes for the next largest size.
I do not have confidence in myself with drilling/tapping and if I were in your shoes I would take it to the most trusted machine shop you can realistically find ... even if it means crossing state lines. You are at a very very very delicate spot right now where if this gets funkerd up you are essentially looking at a new block. Do it nice or do it twice...
I do not have confidence in myself with drilling/tapping and if I were in your shoes I would take it to the most trusted machine shop you can realistically find ... even if it means crossing state lines. You are at a very very very delicate spot right now where if this gets funkerd up you are essentially looking at a new block. Do it nice or do it twice...
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bealljk (04-26-2021)
#203
New Member
Thread Starter
thanks for the input guys! looks like I have some thinking and research to do, Ill let you guys know when I decide what to do next. probably going to start by calling ARP and seeing what they recommend and what products might meet my needs
Last edited by Rinzlark; 04-26-2021 at 06:00 PM.
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bealljk (04-26-2021)
#204
New Member
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https://arp-bolts.com/kits/arpkit-de...?RecordID=3928
Go big or go home....Now you can run ALLLLLL of the boost!
Go big or go home....Now you can run ALLLLLL of the boost!
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bealljk (04-27-2021)
#205
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iTrader: (23)
Head Studs should go in Easy - By Hand......
The Allen head is just so you can do it with a tool instead of using your fingers.
The Allen head is just so you can do it with a tool instead of using your fingers.
Reassembled the head today went to install it went through the 3 step tightening process (30,60,90) got to the last bolt on the final torque setting and it went righty tighty to righty no tighty striped some threads in the block, when I realized what had happened I took a closer look and the stud was backed out about 1/2” probably happened when I took the head off and since it was all the way in the back I didn’t notice it when I put the head on. There are still threads further down. And the stud was a pain getting out, it didn’t want to turn. ended up striping the 3/16 hex in the stud. Had to use 2 nuts like jam nuts in order to get the stud out. Luckily I can get individual studs for around $40 the question is what to do about the block
#206
New Member
Thread Starter
Well I tried to clean out the threads and tap further down into the block and see if I can repair or make usable what was still there but no dice the threads are just too shot and they stripped out again before 50 ft-lb so I am moving on to the next size up to use the GTR materials. Here are some pics of me attempting to repair the threads
Thread tap and thread chaser
Taped off the block to prevent any material from entering the block
Line closest to threads marked OEM deck height in comparison to the thread depth, the next line down is how far down I will depen the threads
Cleaned and taped out the threads
L19 stud marked for deck height at full install depth
New bolt depth in relation to deck height
and like I said above, this was not successful I will be moving onto the GTR studs
Thread tap and thread chaser
Taped off the block to prevent any material from entering the block
Line closest to threads marked OEM deck height in comparison to the thread depth, the next line down is how far down I will depen the threads
Cleaned and taped out the threads
L19 stud marked for deck height at full install depth
New bolt depth in relation to deck height
and like I said above, this was not successful I will be moving onto the GTR studs
#207
New Member
Thread Starter
The Hex was damaged removing the stud after the threads in the block were stripped, locking the stud in the hole. I have, did, and always will install ARP studs by hand. If you can’t get the studs in by hand then there is something wrong with the threads that needs to be addressed first
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OldManZ350 (05-02-2021)
#209
New Member
Thread Starter
over an old head gasket yes, better to scratch or scuff a trashed gasket than the block surface. and i have plenty of them around I think I have 6 used head gaskets laying around and just ordered another new one this morning. every time I torque the head down there is a new gasket underneath no exceptions
Last edited by Rinzlark; 05-02-2021 at 01:31 PM.
#210
New Member
iTrader: (1)
over an old head gasket yes, better to scratch or scuff a trashed gasket than the block surface. and i have plenty of them around I think I have 6 used head gaskets laying around and just ordered another new one this morning. every time I torque the head down there is a new gasket underneath no exceptions
#211
New Member
Thread Starter
yeah I can’t help but imagine what the guys over at CZP think I’m doing, I’ve ordered a new left side head gasket every week for the last month
#213
New Member
Thread Starter
Small update, work has been super busy the last week so I haven’t had time to really touch the car but I did start the thread taping process one the block, hand turned a 27/64 drill bit to cut out the old 11x1.25 threads, slow and steady. The 27/64 drill is also the proper size needed for the 12x1.25 thread tap. I started with a straight flute tap to perfectly align the tap with the hole and took it slowly all the way down to the bottom of the hole. It should be noted that the VR38DETT bolts/studs are much longer than the VQ35DE an obvious improvement given my current predicament. I plan to go through one more time with a bottoming tap to cut the threads all the way to the bottom, the straight flute has a little over 1.5 cm of flute and cutting taper before the full cutting threads. On some other notes the opening hole in the block is already the perfect size for the GTR bolts so aside from cutting out the old threads with the 27/64 bit no further enlargement of the hole was needed. The bolt hole in the head is just a hair too small so I will need to enlarge that before the head goes on as well. I think if I end up pulling the engine and disassembling the engine or building another engine in the future this will be done to all bolt holes and I’ll just go with the GTR bolts
Just placed the GTR bolt in the hole for initial size comparison
Marked the drill depth on the bit
Cut out the old damaged threads
Transferred the depth mark onto the tap
Ran the tap down into the bolt hole
Just placed the GTR bolt in the hole for initial size comparison
Marked the drill depth on the bit
Cut out the old damaged threads
Transferred the depth mark onto the tap
Ran the tap down into the bolt hole
Last edited by Rinzlark; 05-09-2021 at 11:48 AM.
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bealljk (05-09-2021),
Conway_160 (05-10-2021)
#215
New Member
Thread Starter
honestly right now I’m really fighting myself between doing just the one bolt or going ahead and pulling the other head and converting all the bolts to the GTR thread and getting the L19 ARP studs for the GTR keeping them torqued to 90ftlb and selling the VQ35DE L19 kit, I already purchased an individual replacement L19 stud from enjuku racing to replace the damaged one so it’s still a complete kit, maybe I’ll see if anyone will take the kit for $350 or something IDK 🤷♂️I feel like if I don’t it won’t ever be right
Last edited by Rinzlark; 05-10-2021 at 02:09 PM.
#216
New Member
iTrader: (1)
honestly right now I’m really fighting myself between doing just the one bolt or going ahead and pulling the other head and converting all the bolts to the GTR thread and getting the L 19 ARP studs for the GTR and selling the VQ35DE L19 kit, I already purchased an individual replacement L19 stud from enjuku racing to replace the damaged one so it’s still a complete kit, maybe I’ll see if anyone will take the kit for $350 or something IDK 🤷♂️I feel like if I don’t it won’t ever be right
What are you torqueing the heads to? 110 ft/lbs?
#217
New Member
Thread Starter
with the VQ L19's 90 and if i went GTR L19 still 90. when I had the block bored and honed i had them tighten the torque plate to 90ftlb to account for the distortion from torquing the heads to that speck
Last edited by Rinzlark; 05-10-2021 at 03:15 PM.
#218
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Thread Starter
Last edited by Rinzlark; 05-10-2021 at 03:21 PM.
#220
350Z-holic
iTrader: (13)
Do work! I love it! Good ****!
I'd torque them to 100 to 105ft-lbs ... that's where I'm going when mine comes out shortly (after this vhr swap)!
I'd torque them to 100 to 105ft-lbs ... that's where I'm going when mine comes out shortly (after this vhr swap)!