ARP head studs 1/2" too long 6.0 iron
 

Yes I searched... Found two threads, one invalid link, the other 4 years old and didn't really answer my question as it seemed a little vague to me cuz they kept talking old and new block. Quick search on Summit's catalog shows all the same PN for the aluminum and iron blocks. Well, I have determined I don't have all same length studs so that's not the problem. I picked up these studs and this block almost two years ago. I don't have a PN for the studs cuz the box is long gone. Anyway, all the studs are 1/2" too long except for the little biddy ones. Even the short studs on the ends come out 1/2" too long. What's the deal here?

ARP's catalog shows only a difference in same length studs and the older different length studs. I need different length studs, only 1/2" shorter!

Sounds like you got the studs for the 04 and later blocks.

Well I thought the only difference in those were the 4 shorter studs for the older blocks? Mine are all the same finished length with the 4 short ones on the ends, just all 1/2" too long across the board!

Mine are like that, whats the big deal there is thread that extends above the nut. Mine are the older model with the short bolts on the end.

Could you explain the differences between pre 04 and post 04 block differences?

NO. I have an extra 1/2" tapered shank with no thread. I would need 1/2" thick shims/washers to make it work.

OK, Summit Racing has my order on their books with PN arp-234-4110--which is supposed to be the correct app. Look at the pics and you'll see what I mean. ARP thinks I'm stupid and it seems you guys do too. I have an 03 or older block as this one uses the 4 shorter studs. Notice the installed length is the same for all and are 1/2" too long. They are bottomed out. Overall length of the short ones is 5 1/8" and the longer ones are 7 5/16".

http://i210.photobucket.com/albums/b...y/100_1571.jpg
http://i210.photobucket.com/albums/b...y/100_1576.jpg
http://i210.photobucket.com/albums/b...y/100_1572.jpg
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arp studs to long
 

Hello.

I have the same problem. I thought it would be nice to order the 12 point ones vs the 6 point 234-4316 12 point rather then the 234-4110 6 point but the 234-4316 are about 2 to 3 inches to long.
I am positive when I unbolted these heads they had 10 center studs all the same length 10 top studs the shortest and 10 bottom studs shorter then the center studs but when I got these new ones from arp they give you 4 short ones for only the front and rear center holes(2 holes out of 5), the shortest ones for the top holes and the rest they say to use in the center and the bottom.

Center studs are approx 3 inches to long and the bottom ones approx 2 inches to long with the heads on.

I also have the gen111 ls1/lq9 steel block and no one seems to know what to do. I called up arp to see if 234-4110 and 234-4316 are the same and they said only the nuts are different 5 point vs 12 point.

Please tell me you solved this problem. I am at a standstill and Im running a 1250 hp blower on this motor and need the right arp bolts to continue.

Thanks for your time

I never did follow this up. Sounds like maybe you have the later block? My problem is odd and I can't explain it but it turned out to be simple. Mine would stop all at the same place--I honestly thought they had bottomed out. After talking to ARP, they convinced me to start measuring. After I started measuring, I figured out the hole was plenty deep; it just wasn't threading. So I took some anti-seize and a stock head bolt and started cranking. Luckily I was able to get it on down in there--thanks mostly to extra leverage with a ratchet over an allen key. Lots of nasty rust shit came out so I presume that is what was holding it back.

arp bolts to long
 

Thanks for the info. I will measure everything first thing in the morning and keep everyone updated.

Yes I have the 2002 gen lll block so these studs should work and like you said all the bolts seem to stop at the same place.

This block is new and just done at the machine shop I would expect them to have cleaned everything already but thanks for the info.

Id chase the threads and see what happens from there.

arp studs to long
 

I ended up using a micrometer to measure the issues I am having here.

The center hole depths are all 4.5 inches to the flat part of the head while on the motor where the washer would rest. Head gaskets on also.

The length of the studs are 7.25". Minus the washer and nut approx .625 and that leaves approx 2 inches of no thread on the stud sticking out of the head. Please see pic.

I also miked the stud thickness at the thread and the smooth shank and both are .428. Where the threads end going into the head is a tapered angle to the smooth part of the stud.

Obviously these studs have a seat and in no way can they bottom out so therefore I cannot thread these in nor force it past this tapered end beyond the threads.

I attached 2 pics so you can see the taper at the end of the threads and the stud screwed into the head. As you can see the bolt is seated and cannot screw in past the end of the threads and has approx 1.75 inches bare stud before it even gets to the washer and nut.

I have the 2002 ls6 steel block and using the arp 234-4316 studs.

I can see in the arp catalog that there are 2 choices for studs. 234-4110 which according to arp are identical in every way to the 234-4316 except the nuts which first one are 6 point and the latter 12 point.

The thread length going into the block is approx 1.3 inches. Can anyone verify the 234-4110 thread length is the same? Are these bolts both .428 thick? Once the threads end there is no way to send it deeper.

If it is anyone have any suggestions at all?

Thank you all for your time

Does any of the two fit? Did you take this motor apart?

Anyone have the casting number on the block? So we know the difference between the early and later blocks? I have a LQ4 project motor and would like to check to make sure i know what i have so i don't run into this issue.

arp stud issues
 

Hello.

I did take this engine apart but had stock bolts.

I just talked to arp and discussed the fact that their threads on 234-4316 are only 1-3/8 long while my threaded hole in my block are close to 3 inches deep.

In every install write up I have read states the arp studs have to bottom out. I discussed this with arp and explained to them there is no way I can bottom out because their stud has a v angle at the end of the thread that seats at the top of the block surface not at the bottom of the threaded hole.

I am told this is correct but then I call dart heads (I am running ls1 dart pro1 cnc heads) and they gave me a bolt number of 134-3510 but they didnt know the stud number and to call arp for that.

I am running the lq9 steel block from an escalade 2002 and arp is telling me to now run the 234-4317 which makes all the studs depth 1-3/8th deep.

Any input would be appreciated and if anyone has installed the 234-4110 studs do you recall the thread length on these? It would seem to me these are also only 1-3/8 threaded and could not bottom out in the 3 inch threaded hole.

Thanks for your time.

arp stud issue
 

Heres the update.

Arp explained to me some blocks come with a recessed threaded hole. Mine did not. He also explained to me that the full thread engagement required would be 3 times the width of the stud .428 which equals 1-3/8.

I had to order the 234-4317 studs for my 2002 block even though these are for the 2004 and newer.

I am completely satisfied with these answers and wanted to let you all know who helped. I will be running this weekend.

Thank you all for your time.

looks like I will be taking a reall close look at my lq9 block as it is a 2003.

Thanks for the input.

Interesting.

Subscribed as I go take measurements for my "Too short ARP studs".