M6 Injector Thread Repair Kit for Diesel Cylinder Heads

This M6 injector thread repair kit is a high-quality professional solution for repairing damaged or worn injector clamp threads in diesel engine cylinder heads. It is specifically engineered for M6x1 threads commonly used for injector retaining bolts in engines from Mercedes-Benz, VAG, Renault/Dacia, Fiat, Chrysler/Jeep, Porsche and others.

Unlike universal thread repair kits, this system is developed specifically for expansion bolts, which require extended thread length and precise fitment to ensure a secure and durable repair.

The Problem

During injector removal or replacement, cylinder head threads are frequently damaged, especially in engines using M6 expansion bolts. Standard thread repair kits often lack correct length, alignment control, and depth limitation, increasing the risk of improper fastening or severe engine damage.

The Solution

With this premium thread repair kit, the defective bolt hole is precisely drilled out, re-tapped to M8x1, and fitted with a specially designed threaded insert (M6x1 internal / M8x1 external).

All tools are designed for accurate centering and controlled drilling depth, ensuring a professional, long-lasting repair directly in the cylinder head.

Applications

• Repair of damaged injector clamp threads

• Injector replacement on diesel engines

• Restoration of cylinder head threads

Recommended for professional workshops and engine rebuilders.

Compatible Engine Codes

Mercedes-Benz:
OM602, OM611, OM612, OM613, OM628, OM639, OM640, OM642, OM646, OM647, OM648, OM651, OM654, OM668

VAG:
AJS, AXD, AYH, AZV, BAC, BKD, BKP, BKS, BLB, BLE, BLK, BMA, BMM, BMN, BMP, BMR, BNA, BNZ, BPC, BPD, BPE, BPW, BRD, BRE, BRF, BUY, BUZ, BVA, BVE, BVF, BVG, BWF, BWV, CAGA, CAGB, CAGC, CAHA, CAHB, CASA, CASD, CATA, CBAA, CBAB, CBBB, CBDA, CBDB, CBDC, CBEA, CBWA, CCMA, CCWA, CDBA, CDTA, CDTB, CDTC, CDUC, CDUD, CEGA, CFFA, CFFB, CFFD and others

Renault / Dacia:
K9K

Fiat / Chrysler / Jeep / Porsche:
F1AE-, F1CE-, M05.9E, MCR-, MCT-, MCV-, MCW-, MDB-series and others

OE Reference Numbers

Mercedes-Benz: A0009902907, A0019902607, A0039904012, A0049902812, A6119900122
VAG: WHT003179, WHT004739, 03G103385A
Renault: 8200548368
Citroën: 1982C8
Fiat: 9659327680
Ford: 1372386

Original numbers are for comparison purposes only. This is not an OEM tool.

Technical Data

• Original thread: M6x1

• Repair solution: Thread insert M6x1 internal / M8x1 external

• Application: Diesel engine cylinder heads

• Tool quality: Premium grade

Delivery Contents

• 1 × 6 mm twist drill with adjustable depth stop ring

• 1 × 7–8 mm step drill with adjustable depth stop ring

• 1 × Centering guide sleeve

• 1 × M8x1 tap

• 1 × Thread insert installation tool

• 5 × Thread repair inserts (M6x1 internal / M8x1 external)

• 1 × Foam insert

• 1 × Heavy-duty storage case