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Tighten connecting rods correctly

How to install ARP connecting rod bolts
by
Bartek Bartoszewicz
Tuning Professional
0 Comments

The complete guide to installing your con rods

Con rods are without doubt the last thing you would want flying around the place when you step on the gas. But the con rod bolts have to withstand huge forces, which is why correct installation is really vital. Here you’ll find a complete guide to fitting the con rod bolts, and a table showing the correct stretch of each bolt.

It’s a good idea to have the following equipment to hand:

How to install ARP connecting rod bolts

  1. Disassemble and clean the rods (including bolt and beam threads) to remove rust preventative.
  2. Apply ARP Molylube to the threads and under the head of each bolt.
  3. Assamble the rod to the piston. The rod bearing notches must show to the intake of the engine, due to rotation direction of the crankshaft!
  4. Install rods by bringing cap and beam into alignment. Tap into place before installing bolts (DO NOT USE BOLTS TO PULL CAPS INTO POSITION) Each rod is numbered and MUST be assembled with the same number on cap and beam.

Rod torque specs

1 ft./lb. approximates 1,356 Nm

TypeSize InchSize metrichStretch InchStretch mm
ARP 2000 5/16" x 1.500" 7,9mm x 38,1mm 0.0056" 0.14224mm
ARP 8740 3/8" x 1.600" 9,5mm x 40,64mm 0.0047" 0.11938mm
ARP 2000 3/8" x 1.600" 9,5mm x 40,64mm 0.0058" 0.14732mm
ARP 8740
Wave Loc Bolt & Nut
3/8" 9,5mm 0.0063" 0.16002mm
ARP 8740 7/16" x 1.400" 11,1mm x 35,56mm 0.0046" 0.11684mm
SCAT 2001 7/16" x 1.500" 11,1mm x 38,1mm    
ARP 8740 7/16" x 1.600" 11,1mm x 40,64mm 0.005" 0.127mm
ARP 2000 7/16" x 1.600" 11,1m x 40,64mm 0.0062" 0.15748mm
ARP 8740 7/16" x 1.800" 11,1mm x 45,72mm 0.006" 0.1524mm
SCAT 2000 7/16" x 1.800" 11,1mm x 45,72mm    
universal
ARP strech gauge for conrod bolts
Articlenumber: 21111arp
Streckung genau messen
verstellbarer Anschlag
für alle gängigen Dehnschrauben

Delivery 5 to 8 days

€237.05

All statements without guarantee. All rights reserved.

Do you need support?

We take over the professional mounting of your ARP connecting rod bolts! Just contact us by phone or write us in the chat.

universal
ARP Ultra Torque assembly lubricant BIG
Articlenumber: 21110arp
professional assembly
for all screws & bolts
350 gram with brush

Immediate delivery!

€25.25
universal
Holts brakes and parts cleaner 600ml
Articlenumber: 2100358
Clean brake system
Remove oil, debris & grease
Made in Germany
Easy application

Immediate delivery!

Content: 0.6 Liter (€24.92* / 1 Liter)

€14.95

The right accessories for your connecting rod bolts

Tip
universal
achieve optimal stretching
metric system
incl. case
Guaranteed to fit in your car!

Immediate delivery!

€199.95
universal
Clean brake system
Remove oil, debris & grease
Made in Germany
Guaranteed to fit in your car!

Immediate delivery!

Content: 0.6 Liter (€24.92* / 1 Liter)

€14.95
universal
professional assembly
for all screws & bolts
350 gram with brush
Guaranteed to fit in your car!

Immediate delivery!

€25.25
Bartek Bartoszewicz
Tuning Professional
His first car was a Polo Mk1 with a 40 Weber twin carburetor and 129 PS (95 kW). His second was an Audi 50. Today Bartek tunes Lamborghinis to 1000 PS (735 kW). Even as a young boy, Bartek disassembled vehicles and put everything back together better. He wrote his high school diploma with oil on his fingers. The trained automotive mechanic with a focus on engines and gearboxes was determined to go into motorsports. In his 10 years in Formal 1, he supervised 73 races, including as engine mechanic for Ralf Schumacher at Toyota. Since 2010, he has dedicated himself fully to his company BAR-TEK® and helps his customers to bring VW and Audi engines to peak performance.
Expert in
Engine
Gearbox