Weistec ARP Head Studs M156/M159

Weistec · 05-01-2012, 07:12 PM

After years of engineering around the M156/M159 engine platform, we have finally released many of our upgraded engine products. We have also witnessed many AMG owners dealing with dreadful coolant leak/head gasket issues. This is finally the solution for those looking to make big power, or just simply maintain their engine by using the best hardware in the industry.

We at Weistec have partnered with ARP to design and create the strongest and most durable hardware for the M159/M159 heads. These are a 625+ material and also include 12 point fasteners.

Pricing is $899.95

Please call or email us for further information. Thank you all.

http://weistec.com/m156studs.html

Weistec Engineering

To remove this ad, register today or login if you already are registered!

_AMG_ · 05-01-2012, 07:13 PM

What are these bolts made out of?

Weistec · 05-01-2012, 07:23 PM

The material name is Custom Age 625 Plus which is a type of bolt that ARP manufactures for high strength. It is a mixture of Stainless Steel, Nickel, chrome moly, and other proprietary materials that ARP uses in their hardware. It is among the the best bolts for these types of applications. Thanks!

Weistec Engineering

_AMG_ · 05-01-2012, 07:39 PM

Ive actually heard of custom age 625 alloy, very strong and very corrosive resistant. if I'm not mistaken they have a working heat capacity of around 2000°F.
Good stuff Weistec. Would definitely get these (for extra security and peace of mind) if I were running forced induction.

b16 · 05-01-2012, 07:50 PM

Jesus that is expensive for ARP's.

Glad the option is available though.

Sincity · 05-01-2012, 08:39 PM

How many hours does it take to R&R the headgaskets and install the bolts?

James@ACGAutomotive · 05-01-2012, 08:53 PM

Quote:

Originally Posted by Sincity

How many hours does it take to R&R the headgaskets and install the bolts?

About 15 hours

splinter · 05-01-2012, 09:14 PM

Like Weistec, ARP is another California firm that knows its business.

Quote:

CUSTOM AGE 625 PLUS®: This newly formulated super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Typical tensile strength is 260,000-280,000 psi.

http://arp-bolts.com/pages/technical_metallurgy.shtml

Merc63 · 05-02-2012, 12:13 AM

When my heads come off, this will be getting done.

MACHC5 · 05-02-2012, 07:29 AM

Weistec -
Can the ARP bolts be installed without removing the heads..?
That's what they do with Mitsubishi EVO's when upgrading to ARP head bolts.

Jim
MachC5

jacob502 · 05-02-2012, 07:32 AM

This is a great add on when you get your Race ported heads

PTE · 05-02-2012, 08:05 AM

As a retired engineering Liaison , I was involved in many new developments of engine platforms. Where we would use an existing Crank-shaft ( Engineering & Tooling was already expensed out) Saved Money. But would run into issues of holding a newly developed heavier Flywheel with a built in Harmonic balance in place at 5000 rpm. ( Second order issues ) at 5150 rpm & higher or lower it was OK. But if was left at 5000 rpm there it would shear , bolts or studs , over a 3 hour dyno endurance run. We did not have time to retool the Crank to get the motor into production. So we went with ARP 625 studs & their matching washer & Nuts. This got us 3 more years down the road . to the annual retooling time. ARP has a wide variety of solutions that work well. It was expensive , but we made the introduction date.
Cheers _PTEngineering

Weistec · 05-02-2012, 08:09 AM

Thank you guys for the interest and comments, and thank you James for helping answer some questions. James is correct about install time. They have performed most, if not all modifications we offer on customer cars.

The Custom Age 625 Plus head stud is extremely strong and one of the best bolts for changing temperatures, and this is why it is commonly seen on forced induction and diesel applications. It's expansion under high heat is minimal compared to other materials.

The price of a Custom Age 625 Plus ARP is typically much higher than say an ARP2000 because of the material, technology involved, and design and machine time. The pricing is actually very competitive to say a Nissan GT-R head stud package which has two less cylinders.

Heads do have to be romoved on some chassis models to install our head studs. (CLK might be one of them.) There is not enough room to slide the stud into the whole near the apron area.

Thanks again guys!

Weistec Engineering

Sincity · 05-02-2012, 10:13 AM

Quote:

Originally Posted by James@ACGSD

About 15 hours

Thanks for answering, James.

BerBer63 · 05-02-2012, 10:52 PM

No wonder MBenz doesn't want to send out a TSB...200 bucks in bolts and 15 hours of tech time. Cheaper for them to deal with a couple failures

05-01-2012, 07:13 PM	#2
_AMG_ MBWorld Fanatic! Garage is empty, add now Join Date: Jul 2009 Location: Los Angeles Posts: 6,674 Drives: C63	What are these bolts made out of? __________________

05-01-2012, 07:23 PM	#3
Weistec SPONSOR Garage is empty, add now Join Date: Dec 2010 Posts: 245 Drives: M156 Supercharged	The material name is Custom Age 625 Plus which is a type of bolt that ARP manufactures for high strength. It is a mixture of Stainless Steel, Nickel, chrome moly, and other proprietary materials that ARP uses in their hardware. It is among the the best bolts for these types of applications. Thanks! Weistec Engineering __________________ World's First Supercharged M156 6.3L CONNECT WITH US www.Weistec.com Sales@Weistec.com Check out our Instagram @Weistec

05-01-2012, 07:39 PM	#4
_AMG_ MBWorld Fanatic! Garage is empty, add now Join Date: Jul 2009 Location: Los Angeles Posts: 6,674 Drives: C63	Ive actually heard of custom age 625 alloy, very strong and very corrosive resistant. if I'm not mistaken they have a working heat capacity of around 2000°F. Good stuff Weistec. Would definitely get these (for extra security and peace of mind) if I were running forced induction. __________________ Last edited by _AMG_; 05-01-2012 at 07:42 PM.

05-01-2012, 07:50 PM	#5
b16 Senior Member Garage is empty, add now Join Date: Mar 2012 Location: SF Bay Area Posts: 496 Drives: 2009 C63, 2000 ML 430, 1994 Del Sol Vtec	Jesus that is expensive for ARP's. Glad the option is available though. Last edited by b16; 05-01-2012 at 08:30 PM.

05-01-2012, 08:39 PM	#6
Sincity MBWorld Fanatic! Garage is empty, add now Join Date: Feb 2003 Location: Vegas and Vancouver, BC Posts: 5,502 Drives: '86 190e restoration project, '08 Acura RDX, '09 C63 AMG	How many hours does it take to R&R the headgaskets and install the bolts? __________________ "Unofficial Member" of the Vancouver Benz crew.

05-02-2012, 12:13 AM	#9
Merc63 MBWorld Fanatic! Garage is empty, add now Join Date: Jan 2009 Posts: 2,678 Drives: C63 AMG	When my heads come off, this will be getting done. __________________ Weistec stage 3 w/ built tranny. ---------------------------------------------- PARTING OUT ENTIRE 2009 C63 AMG! http://mbworld.org/forums/c63-amg-w2...-2009-c63.html

05-02-2012, 07:29 AM	#10
MACHC5 MBWorld Fanatic! Garage is empty, add now Join Date: Apr 2006 Location: Central New Jersey Posts: 1,054 Drives: CLK63 Black, 600E, Supercharged Denali, Lotus Elise	Weistec - Can the ARP bolts be installed without removing the heads..? That's what they do with Mitsubishi EVO's when upgrading to ARP head bolts. Jim MachC5

05-02-2012, 07:32 AM	#11
jacob502 Banned Garage is empty, add now Join Date: Nov 2010 Posts: 956 Drives: 2008 C63 ,2009 SL 63 AMG, 2011 SLS AMG	This is a great add on when you get your Race ported heads

05-02-2012, 08:05 AM	#12
PTE MBWorld Fanatic! Garage is empty, add now Join Date: Jul 2005 Location: S.E. FLA. Posts: 1,197 Drives: 03 CLK5.5 AMG has left the Garage	Weistec & ARP As a retired engineering Liaison , I was involved in many new developments of engine platforms. Where we would use an existing Crank-shaft ( Engineering & Tooling was already expensed out) Saved Money. But would run into issues of holding a newly developed heavier Flywheel with a built in Harmonic balance in place at 5000 rpm. ( Second order issues ) at 5150 rpm & higher or lower it was OK. But if was left at 5000 rpm there it would shear , bolts or studs , over a 3 hour dyno endurance run. We did not have time to retool the Crank to get the motor into production. So we went with ARP 625 studs & their matching washer & Nuts. This got us 3 more years down the road . to the annual retooling time. ARP has a wide variety of solutions that work well. It was expensive , but we made the introduction date. Cheers _PTEngineering Last edited by PTE; 05-02-2012 at 08:08 AM.

05-02-2012, 08:09 AM	#13
Weistec SPONSOR Garage is empty, add now Join Date: Dec 2010 Posts: 245 Drives: M156 Supercharged	Thank you guys for the interest and comments, and thank you James for helping answer some questions. James is correct about install time. They have performed most, if not all modifications we offer on customer cars. The Custom Age 625 Plus head stud is extremely strong and one of the best bolts for changing temperatures, and this is why it is commonly seen on forced induction and diesel applications. It's expansion under high heat is minimal compared to other materials. The price of a Custom Age 625 Plus ARP is typically much higher than say an ARP2000 because of the material, technology involved, and design and machine time. The pricing is actually very competitive to say a Nissan GT-R head stud package which has two less cylinders. Heads do have to be romoved on some chassis models to install our head studs. (CLK might be one of them.) There is not enough room to slide the stud into the whole near the apron area. Thanks again guys! Weistec Engineering __________________ World's First Supercharged M156 6.3L CONNECT WITH US www.Weistec.com Sales@Weistec.com Check out our Instagram @Weistec

05-02-2012, 10:52 PM	#15
BerBer63 MBWorld Fanatic! Garage is empty, add now Join Date: Aug 2008 Location: Los Angeles Posts: 1,993 Drives: 2009 C63	No wonder MBenz doesn't want to send out a TSB...200 bucks in bolts and 15 hours of tech time. Cheaper for them to deal with a couple failures __________________ 2009 C63 Palladium Silver

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread: