Product successfully added to your shopping cart
Quantity
Total
There are 0 items in your cart. There is 1 item in your cart.
Total products
Total shipping To be determined
Total
1.4L 8v - 840 730
Manufacturers
1.4L 8v - 840 730
View larger Warning: Last items in stock!
New product
Kit of ARP2000 rod bolts replacing the original bolts on the OEM rods of the Renault 5 Turbo and Super 5 GT Turbo with the 840 730 engine.
The 840,730 is the 1.4-litre, eight-valve four-cylinder of the Renault 5 Turbo (1,397 cc, 160 hp, 1980 to 1985), fed by a turbocharger; the same code powers the Super 5 GT Turbo (120 hp, 1985 to 1991). The ARP catalogue lists this kit for the mid-engine R5 Turbo.
This kit takes the place of the original rod bolt of this engine; neither Renault nor ARP publishes the diameter of that bolt, and the maker lists the kit for the mid-engine R5 Turbo.
Few parts of the bottom end work as hard as the rod bolt: at every revolution, it is what stops the cap from pulling away under the inertia loads of the rod and piston assembly. The original bolt is designed for stock power and is single-use.
The ARP2000 bolts in this kit are tightened by stretch, 0.165 to 0.178 mm, the method the ARP instruction sheet gives first; the 56.9 Nm torque is only provided for when no gauge is available. ARP2000 is an alloy steel developed by ARP and heat treated to 220,000 psi tensile strength; its threads are rolled after heat treatment. Standard engine fasteners commonly fall into classes 10.9 and 12.9, i.e. 150,800 to 176,900 psi minimum strength: ARP2000 sits 24 to 46% above that.
| Part number | Brand | Grade / material | Head | Thread | Under-head length |
|---|---|---|---|---|---|
| ARP-216-6302 | ARP | ARP2000 | Not published | Not published |
| Reference | Tightening torque | Stretch |
|---|---|---|
| ARP-216-6302 | 56.9 Nm | 0.165 - 0.178 mm |
For this part, ARP favours tightening to a measured stretch, the key to an exact preload; torque is given only when no gauge is available. The figures in the table assume ARP lubricant.
Source of the torque and stretch figures: ARP 216-6302 instruction sheet, in the revision applicable at publication. The manufacturer's instruction sheet prevails in the event of any difference. Read the ARP 216-6302 instruction sheet
No thread locker is called for by the ARP instruction sheet for this kit: the bolts are fitted with ARP Ultra-Torque grease, on the threads and under the head.
The ARP instructions for this kit require the big ends to be checked and resized once the fasteners are fitted: this job belongs to an equipped machine shop.
With the stretch gauge, you read directly how much the bolt stretches during tightening: the dial gauge sits on both ends of the fitted bolt, and tightening stops when the stretch reaches the value in the table. Friction no longer comes into play, hence a more consistent preload on a heavily stressed engine.
Tightening is done with ARP assembly grease, on the threads and under the head: the torque and stretch figures in the table were established with it.
An engineer with an aerospace background, Gary Holzapfel launched ARP (Automotive Racing Products) in the early 1970s with one goal: to eliminate engine failures caused by weak fasteners in racing. ARP designs and manufactures thousands of part numbers in California, cylinder head, main and rod bolts, in several materials depending on the use, and has become known for the consistency of its manufacturing.
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Renault | 5 (122_) 1.4 | 840,730 | 160 hp | 1980-1985 |
| Renault | 5 (122_) 1.4 Turbo (8220) | 840,730 | 160 hp | 1980-1985 |
| Renault | Super 5 (B/C40_) 1.4 Turbo GT (C405) | 840,730 | 120 hp | 1985-1991 |
On a 1.4-litre turbo whose boost pressure is raised, each rod bolt carries a heavier load, and that load grows with engine speed. A bolt that lets go destroys more than a rod: the piston, the block and the crankshaft follow. ARP2000 bolts cost little compared with the rebuild that would follow.
