why are we all wasting money on TTY head bolts?

[Ratman]

One other phenomenon that happens with a bolt is that as it is tightened, it stretches ever so slightly over the length of its threads, -which can sometimes put additional stress at the upper threads of where it is threaded into. With a stud, the tension is exhorted much more evenly to the threaded hole it is installed in, -which in the case of our somewhat frail 6.5 blocks surely can't hurt anything.

 

[turbonator]

One other phenomenon that happens with a bolt is that as it is tightened, it stretches ever so slightly over the length of its threads, -which can sometimes put additional stress at the upper threads of where it is threaded into. With a stud, the tension is exhorted much more evenly to the threaded hole it is installed in, -which in the case of our somewhat frail 6.5 blocks surely can't hurt anything.

hey ratman, have not seen you around fer awhile... hows your truck runnin?

when we decked our 599 block that burned in the shop fire, the machinist did the first pass at .002" , and showed us also how the threads in the blocks pull and mushroom out....

 

[Acesneights1]

It was Jeff that began this thread, but I will respond now. When we were in the shop, one of the guys was beginning to reassemble a 6.5L. He had all the pieces gathered and just was to install our cam bearings, then move on to the 6.5L. I noticed that he had a box of used head bolts with the rest of the pieces and had to ask him. The bolts are all collected from old blocks and re-used. Originally the 6.2L did not use a TTY bolt, did not think to ask him if these were the bolts that they had gathered. One thing he did mention was that they had some problems with the newer TTY bolts and less problems with the used.

As Jeff mentioned, before we knew any better (or worse...LOL), we re-used our head bolts. We busted two in the install, I figured it was a little to do with my torque wrench at the time (since replaced and need a new one again). This motor is special to us as it was our intro to the 6.2/6.5L. It has over 70,000km now, is our daily driver, our go to puller and #1 work truck.

What you speak of is mention in the GM factory Service manual for the 6.2 diesel. The Original ones were not TTY but they didn't hold either so the TTY's were the half ass patch. Can they be reused ??The Brown 83 in my photo album,,,I did just that..before I knew any better. It held fine. Would I ever do HG's again without using only ARPs ? No way in Hell. they are worth the money ,more so than ever with all the knock off shit coming from China.

 

[Ratman]

hey ratman, have not seen you around fer awhile... hows your truck runnin?

when we decked our 599 block that burned in the shop fire, the machinist did the first pass at .002" , and showed us also how the threads in the blocks pull and mushroom out....

Hey turbonator, I've been beating the crap out of this 19:1 motor, -hard to believe it's got over 35k on it already, -that's a good thing and not complaining! As all of us 6.5'ers, I'm always looking for more, but at the end of the day, the dang thing still turns heads and earns respect. I haul and tow once in a while, -last summer a lot when the company I work for moved, -I hauled lots of heavy steel, racking, and machine tooling on an 18' tandem axle flatbed trailer, -truck loaded as well. In all honesty, I love my NV4500 for bangin' gears empty, but I don't like it one bit for hauling or pulling, -in fact a real PITA. I'd take a 4L80 anyday over the NV for pulling stuff.

In a nutshell, I need more fuel (like everyone else on this 6.5 forum) and am really interested in how to get that fuel in mechanical form. I love my DB2, and the way it drives, but, it's just not enough to make serious power numbers. My little GM4 screaming away at over 20+ psi makes my IAT's go upwards of 200+ on a hot day (counterproductive). I do not run any sort of ATA intercooler, but I am entertaining the idea of WMI, -and home building it. I am probably going to tap into buddy for some advice on that, -and I love the home-brew fiberglass tank someone on here made (an old thread in the perf section).

I could go on and on, but, I will say that my 6.5 is running GREAT, and always get's it done, -and has been reliable as my daily driver for some time now. This truck is great, and it is not going to be for sale any time soon.

I'm planning for new paint, and lift in the next couple years, -she's a keeper.

Yes, taking a .002" pass will show "volcanoes" around the threaded holes on the deck. Your machinist must be very talented to be able to dial that block in well enough to take a .002" pass, -very impressed with that, must know his stuff.

 

[great white]

-and I love the home-brew fiberglass tank someone on here made (an old thread in the perf section...

That would be me.

It wasn't easy, fast or cheap......

It feeds a Devils Own progressive kit.

Not really practical for towing (6 gallon), but maybe if you were trying 1/4 mile or sled puling.... but there's also better suited engines out there for that too.

With the new optimizer and water pump, I don't ever really turn the WI on anymore.....just don't need it.

 

[Ratman]

That would be me.

It wasn't easy, fast or cheap......

It feeds a Devils Own progressive kit.

Not really practical for towing (6 gallon), but maybe if you were trying 1/4 mile or sled puling.... but there's also better suited engines out there for that too.

With the new optimizer and water pump, I don't ever really turn the WI on anymore.....just don't need it.

I thought you did a spectacular job on the glass work. I have done my share of fiberglass work, -I hate working with the stuff! There really is no limit to what you can make though, that aspect of it is very cool. I work for a company that has a full plastics fab shop, -they weld poly, and pvdf, -so I'll likely tap into the guys in the fab shop when I need a tank.

I'm looking to cool my IAT's just a touch, -and a little extra kick from the alky.