ARP2000 torque???

[Vagos]

Hi to all.Many of you have seen probably that there are a lot of cheap cih rods around the web and ebay.i have got myshelf one set for my 2,4cih engine.I asked the seller about the torque settings of the arp2000 bolts and he told me that with connecting rod assembly oil(probably 10-30w non synthetic)i should give them 47ft/lbs thats about 6.5kg.I have also heard that these arp 2000 are from 44 to 49pf/lb.can anyone confirm these.Plus for 47pf/lb.Should we go at once at those lb or give the ussual 3 settings before final torque.which in this case will be probably 41lb,44lb and 47lb?????What realy is more strange for the arp2000 is that on their site gives difreent torque setting for each car.They dont have a common torque for the arp2000.
can anyone give a little light on this subject???

plus i got myshelf a set of fllywheel arp bolts from the toyota 4ag bolts.On their paper they say with 30w oil to give them 85pf/lbs (not mentioned of re-torque them 3 times)anyway on my 2512 engine seemed to work just fine as long as this engine lasted.But i have to two separate 2.5cih race engines and both on their first runs they where chopped at once!!!!???Probably fualty torque wrench??

[wrench459]

Don't you use the moly lube for the ARP bolts?
Torque is fine but a stretch reading is better IMOA.

[Vagos]

Yes i have moly lube.but since the seller put in the same bag an assemly oil and the moly lube i thought to ask more general.Yes the strech method is better but i know only the torque number setting and i doubt that i will find out the stretching numbers.Anyway what torque numbers are more correct for the arp2000 3/8(9mm)connecting rods?

[wrench459]

I don't have the charts right in front of me for the bolt stretch tonight.
Bet someone will post the numbers before I get back to the shop in the morning.

[RallyBob]

Originally Posted by Vagos What realy is more strange for the arp2000 is that on their site gives difreent torque setting for each car.They dont have a common torque for the arp2000. can anyone give a little light on this subject???

This is not uncommon. The torque setting will change depending on the diameter of the bolt as well as the length of the bolt. So most individual applications will be different. I would wait to find out the EXACT specification for your particular connecting rods.

Also, the torque spec changes a LOT when you use the moly lube compared to the 10w-30 oil. As an example, the ARP flywheel bolts for a Chevy V8 (7/16") are rated at 115 ft lbs of torque with 10w-30 oil, but only 85 ft lbs with moly lube! So you must be positive of which lubricant to use with the appropriate torque spec.

Bob

[wrench459]

The catalog says arp lube only for the bolts.
Oil is not recommened! Do you have a part number for the bolts?
Toyo 4AGE #203-6001 stretch .0057 40lbs. with arp lube

[lamchop77]

Vagos

Got a set of forged rods myself with ARP2000 bolts fitted. I'm 99% sure that the torque setting is 47ft/lb for the bolts. You MUST use the special lube that comes with the rods/bolts not oil. Also it tells you to tighten to the 47 ft/lb 3 times to settle the bolts down. Reading the ARP web site the accurate way to tighten is the stretch method but i am not familiar with this so i can't comment.

Personally i would tighten up the bolts 20, then 30, then 40, and finally 47, and then repeat 3 times. If i'm wrong in doing this please tell me, someone, as i will be fitting my rods in the near future!!!

Just in case the 1% chance i'm wrong with the 47 figure i will post the correct info when i have dug out the instructions that i have (SOMEWHERE!!!!)

Hope this helps

Chris

[wrench459]

Originally Posted by lamchop77 Vagos Reading the ARP web site the accurate way to tighten is the stretch method but i am not familiar with this so i can't comment.

The stretch method has it's goods and bads.
100% clamping vs 80% torque method
faster build time
stronger

Now the bads
you'll need special tools
ONCE stretched you cant/should not reuse!!!!!!!!

Originally Posted by lamchop77 Personally i would tighten up the bolts 20, then 30, then 40, and finally 47, and then repeat 3 times. If i'm wrong in doing this please tell me, someone, as i will be fitting my rods in the near future!!!

Sounds good to me.
I use a steady pull on the first 2 cycles of the bolts then get picky on the last pull.

Dont forget to check the calibration of your torque wrench.. I'm guilty also its been over 5 years for mine.

[Vagos]

I dont want to take anyone on my neck but from what i learned so far searching and asking around is that the are some general arp2000 bolts same lenght for probably half or more connecting rods outhere.Typical figures are with arp lobe 45ft/lb re -tighten up to 3 times.I also asked a friend who had worked this rods before and he told me that the typical lb,kilos for them are from 6-6,5kg.Somethmes he used oil some times not.Still no rod fuilure up today.Offcourse when you buy cheap and not from a well known company you probably get what you asked for.

[lamchop77]

Vagos

Found the installation instructions for the ARP 2000. Definately says 47ft/lb three times for tightening

Chris