Engine Parts

[LGAFF]

Looks like the prior owner of my block may not be able to locate the head bolts.....was wondering if any knows of sources or am I stuck with paying Kurt White $47 per bolt.

Also will be looking for coolant tubes and an air horn as I move forward.....may need to find head bolts first.

LGAFF
92 ZR1
#234

[GOLDCYLON]

Jeffvette maybe. Hes out of town at the moment I think although

[Z51JEFF]

How about the place that parted that black 91 on Fleabay a few weeks ago,they parted the whole car,literally.

[A26B]

How about the place that parted that black 91 on Fleabay a few weeks ago,they parted the whole car,literally.

Head bolts are supposed to be used once only, according to the General. Having said that, I know engines have been rebuilt using the same head bolts with no adverse effect.

I' ve probably got a set with special washers (need these too) laying around. PM me to discuss $ if you're interested.

[karterdon]

Head bolts are a stretch bolt - Never resuse them - Bad things can happen !! There is a reason why they are called stretch bolts and have a one time use.

Don Yoakem
91 #267 Dark Red Met.

[LGAFF]

I would tend to agree, but have noticed them re-used here on the forum. Is there a supplier for new?

By the way Don, had the 500CLK out this weekend, went to my class reunion in Decatur......took some backroads and the car is great the pull from 50-130+ was amazing, powerful yet smooth. I cannot imagine driving an AMG car, instead of having the AMG event at a delaership they really need to get it out somewhere you can truly drive the car. Good MPG also for a V8 ended up with 25MPG.


LGAFF
92 ZR1
#234

[cuisinartvette]

maybe we could get a larger bolt co to make some.

http://www.darlingbolt.com/

$47 per bolt :rolleyes:
That is an absolute joke of a price I dont care how "rare" it is.
Time to get new ones made.

jm 2 cents.

[Jeffvette]

Lee, I'll give you a shout Tuesday when I return from Atlanta.

BTW, the bolts from GM were 56 bucks.

[karterdon]

Lee, Contact ARP Racing - They have all sorts of head bolts. THeir wed site even has a parts request form. 1.866/381-4618. These Guy's are the racing bolt fabricators - I bet they can help.

Don Yoakem
91-#267 Dark Red Met.

[cuisinartvette]

Lee, I'll give you a shout Tuesday when I return from Atlanta.

BTW, the bolts from GM were 56 bucks.

Had no idea they were that much. Perhaps we should round up whatever torque to yield bolts these things use and get some new ones made so they can be reused. One less thing for everyone to worry about.

[bldavis11]

Okay, I'll bite. If we're going to make the bolts, I can pitch in for a set.

[LGNDLT5]

Looks like the prior owner of my block may not be able to locate the head bolts.....was wondering if any knows of sources or am I stuck with paying Kurt White $47 per bolt.

Also will be looking for coolant tubes and an air horn as I move forward.....may need to find head bolts first.

LGAFF
92 ZR1
#234

I have the coolant tubes, OEM gaskets and the airhorn available, all NOS. Unfortunately not the head bolts. Let me know if you need them and we can work out something reasonable if desired. :handshak: John R. Sullivan 847-275-4841

[A26B]

I'm going to share a conversation I had with Graham Behan last May about this subject.

As I recall, Graham said they never actually measured the bolt length when installed, cold or hot. Due to the higher thermal coefficient of expansion, aluminum vs steel, the bolts will incur higher axial tension at engine operating temps than when installed at ambient conditions. Determining the difference in length would require flat grinding the ends of the bolt and using a sonic instrument to measure the differential length, cold to hot. With that information, stress on the bolt can be calculated to see if yield strength was exceeded. It could also be obtained by accurately measuring the length of a new bolt at std temp with a micrometer before install and again after it was removed from a heat cycled engine. If the length is greater after use, that would be an indicator of permanent deformation, and therefore exceeding yield strength of the bolt.

I came away with the impression that replacing the bolts after 1 use was an insurance policy factor as opposed to empirical testing data.

Would be interesting to know about head replacements with used bolts & the results.

Jerry

[phrogs]

I have a used set of head bolts if your interested.

Oh and I have never bought new bolts for the motors I have $50 a bolt I know im not the only one to reuse these head bolts

[LGAFF]

I sent a note to ARP to see if they can reproduce the head bolt....more to come.

LGAFF
92 ZR1
#234

[Polo-1]

Ron Woods has the ARP studs. They are pricey $1250. they are made from the ARP 2000 rod bolt material. Im sure thay could have been made from 8740 moly and been much cheaper.

Ron and Randy's stuff is pretty top notch stuff.

http://www.zr1products.com/vendors.html

[LGAFF]

Holy Chit!
$1250 thats about what I have in to the entire motor:jawdrop:

LGAFF
92 ZR1
#234

[Polo-1]

$50 x 20 = $1000.00 for non reuseable bolts.:dontknow:

[flyin ryan]

ya...i was going to say something earlier. i've had ARP make me custom stuff lots of times & it's never cheap. they can do whatever a person wants but the super small run (volume) stuff ain't cheap. we get too used to their fasteners in the catalog that have part numbers attached, which are reasonable in price, IMO, but they sell hundreds of thousands of them to make up for it.

[LGAFF]

ARP says they have nothing that fits our application, they are asking for measurements....my guess is someone out there has these, any volunteers to give me the info?

I will e-mail quesitons to you.

LGAFF
92 ZR1
#234

[GOLDCYLON]

Did you talk to Jeff Flint AKA Jeffvette? $1200 is insane for a set of bolts!!!

[Jeffvette]

M14 x 1.5 x 220mm

[Jagdpanzer]

Parts book specifies 14X1.5X80
Can someone confirm this is the correct size head bolt?
Do the factory LT5 head bolts have any special feature?
Fastenal has 10.9 grade bolts listed in this size.

[Polo-1]

I can tell you it's NOT 80mm. Thats only 3.149 inch. The bolts go from the top of the head to the bottom of the block.

[A26B]

Parts book specifies 14X1.5X80
Can someone confirm this is the correct size head bolt?
Do the factory LT5 head bolts have any special feature?
Fastenal has 10.9 grade bolts listed in this size.

What Jeff said.....14 x 1.5 x 220

Thread length is 62mm. Bolts must also have the flat ground, hardened washer. Obviously the washers can be reused, but if you have NO head bolts, the washers will be required also. Bolt head has an integral flange under the hex. I would imagine the prudent thing to do would be to send a stock head bolt to ARP to copy the configuration. I'll go so far as to say the result will be sticker shocking from ARP as well. It's a really big bolt.

[Jeffvette]

Parts book specifies 14X1.5X80
Can someone confirm this is the correct size head bolt?
Do the factory LT5 head bolts have any special feature?
Fastenal has 10.9 grade bolts listed in this size.


M14 x 1.5 x 220mm

[LGAFF]

ARP sent a form to fill out, they want actual measurements including gasket material etc. They stated they may have otherbolts that match.

PDF file is too big to post here.

I can't believe these frggin head bolts are more than I paid for a shortblock.

LGAFF
92 ZR1
#234

I wonder what ACE hardware has in stock.:mrgreen:

[Polo-1]

Stroker Crank.......... check
JE pistons................check
Oliver rods...............check
SGC Cams................check
.
.
.
.
Made in China bolts to hold it all together.........[-X

[flyin ryan]

yup...that's what you gotta have is the form. got a bunch here at all times, unfortunatly. the main measurment they will want above all else is U.H.L. (under head lenght). also, i always shoot for maximum thread lenght in(to) an aluminum block.

[rkreigh]

guys,

Ron and Randy Woods

ZR1 Specialty Products make head studs that work just great

they worked with ARP to design just the right stuff and are both cheaper and superior to stock

give em a shout

[Jeffvette]

they worked with ARP to design just the right stuff and are both cheaper and superior to stock

Ron, they are not cheaper than the stock bolts.

Even at the bolts retail price of 50, the ARP studs are still 250.00 more.

[Zr1 Destroyer]

:happy1:......

[LoTu5]

If the stud sets come out at a reasonable price and you need numbers to get a better deal I would be interested in being added to a group buy.

Regards.

[Chris_32212]

i had stage 8 special make some locking header bolts for my LT5. i bet if you called them with the specs, they could make you the bolts you needed.

Chris