In February 2024, Mitsubishi filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Engine, covering the Super Great. The filing affects 3,642 vehicles manufactured between December 2022 and June 2023.
Overview
| MLIT filing number | 1154520 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | February 8, 2024 |
| Manufacturer(s) | Mitsubishi |
| Component | Engine |
| Production period | December 2022 — June 2023 |
| Vehicles affected | 3,642 units |
Filing in context
The Engine is the most frequently cited component category in this archive, appearing in 72 of its 4,890 filings. This filing is one of 41 Mitsubishi notifications from 2024 in this archive. For scale, 2,107 of the 4,890 filings in this archive report a larger number of affected vehicles; the vehicles involved here were manufactured over a span of about 6 months.
Defect
On heavy-duty trucks equipped with the 6R20 engine, the adjust screws of the exhaust rocker arms have insufficient lubrication performance. During extended idling, the adjust screws wear and fracture prematurely, causing abnormal noise and reduced power output. Continued operation in this condition can cause the valve bridge to fall out and damage the engine. In the worst case, the vehicle may become inoperable.
Corrective action
On all vehicles, replace the exhaust rocker arm assembly with the corrected part.
Affected models & chassis ranges
This filing lists 29 type code(s). A vehicle is affected if its chassis number falls within one of the ranges below.
| Type code (型式) | Model | Chassis ranges |
|---|---|---|
| 2KG-FS70HZ | ふそうスーパーグレート | FS70HZ-540252 — FS70HZ-545107 |
| 2KG-FS74HZ | ふそうスーパーグレート | FS74HZ-542031 — FS74HZ-545776 |
| 2KG-FU70HY | ふそうスーパーグレート | FU70HY-540080 — FU70HY-545010 |
| 2KG-FU74HZ | ふそうスーパーグレート | FU74HZ-540740 — FU74HZ-545208 |
| 2KG-FV70HJR | ふそうスーパーグレート | FV70HJ-540138 — FV70HJ-545031 |
| 2KG-FV70HX | ふそうスーパーグレート | FV70HX-541043 — FV70HX-545206 |
| 2KG-FV70HY | ふそうスーパーグレート | FV70HY-540270 — FV70HY-545103 |
| 2KG-FV70HYP | ふそうスーパーグレート | FV70HY-540295 — FV70HY-545120 |
| 2KG-FV70HZ | ふそうスーパーグレート | FV70HZ-540227 — FV70HZ-545101 |
| 2KG-FV70HZP | ふそうスーパーグレート | FV70HZ-540261 — FV70HZ-545088 |
| 2KG-FV74HJR | ふそうスーパーグレート | FV74HJ-540028 — FV74HJ-545009 |
| 2PG-FP74HDR | ふそうスーパーグレート | FP74HD-540578 — FP74HD-545278 |
| 2PG-FP74HER | ふそうスーパーグレート | FP74HE-540238 — FP74HE-545083 |
| 2PG-FP74HGR | ふそうスーパーグレート | FP74HG-540046 — FP74HG-545007 |
| 2PG-FS70HZ | ふそうスーパーグレート | FS70HZ-540253 — FS70HZ-545110 |
| 2PG-FS74HY | ふそうスーパーグレート | FS74HY-540033 — FS74HY-545008 |
| 2PG-FS74HZ | ふそうスーパーグレート | FS74HZ-542162 — FS74HZ-545868 |
| 2PG-FS75HZ | ふそうスーパーグレート | FS75HZ-540332 — FS75HZ-545099 |
| 2PG-FU70HY | ふそうスーパーグレート | FU70HY-540078 — FU70HY-545016 |
| 2PG-FU74HY | ふそうスーパーグレート | FU74HY-540051 — FU74HY-545022 |
| 2PG-FU74HZ | ふそうスーパーグレート | FU74HZ-540742 — FU74HZ-545277 |
| 2PG-FU75HZ | ふそうスーパーグレート | FU75HZ-540198 — FU75HZ-545047 |
| 2PG-FV70HX | ふそうスーパーグレート | FV70HX-541060 — FV70HX-545241 |
| 2PG-FV70HY | ふそうスーパーグレート | FV70HY-540269 — FV70HY-545126 |
| 2PG-FV70HZ | ふそうスーパーグレート | FV70HZ-540231 — FV70HZ-545115 |
| 2PG-FV74HJR | ふそうスーパーグレート | FV74HJ-540031 — FV74HJ-545004 |
| 2PG-FV74HZ | ふそうスーパーグレート | FV74HZ-540103 — FV74HZ-545035 |
| 2PG-FY70HY | ふそうスーパーグレート | FY70HY-540049 — FY70HY-545023 |
| 2PG-FY74HY | ふそうスーパーグレート | FY74HY-540033 — FY74HY-545010 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
６Ｒ２０ 型エンジンを搭載した大型トラックにおいて、排気ロッカーアームのアジャストスクリューの潤滑性能が不十分なため、長時間のアイドル運転を行うと早期にアジャストスクリューが摩耗及び破損して異音や出力の低下が生じることがある。そのため、そのままの状態で使用を続けると、バルブブリッジが脱落してエンジンが破損し、最悪の場合、走行不能に至るおそれがある。
改善措置
全車両、排気ロッカーアーム一式を対策品に交換する。
Source & verification
This entry reproduces public data from Japan's MLIT recall registry. English text is jdmvin.com's own translation; always verify against the official source:
https://renrakuda.mlit.go.jp/renrakuda/ris-detail-car.html?class=recalldatacar&id=3009639
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Engine, closest to this one by filing date.
Engine — affects 13,995 vehicles.
Open recall detail →Engine — affects 79,208 vehicles.
Open recall detail →Engine — affects 4 vehicles.
Open recall detail →Engine — affects 11,419 vehicles.
Open recall detail →Engine — affects 32,065 vehicles.
Open recall detail →Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Other (Emissions/Noise) — affects 34,092 vehicles.
Open recall detail →Other (frame/body) — affects 311 vehicles.
Open recall detail →Turn Signal Lamps — affects 1,607 vehicles.
Open recall detail →Other (Occupant Protection Equipment) — affects 558 vehicles.
Open recall detail →Computer (Emissions/Noise) — affects 31,122 vehicles.
Open recall detail →All Mitsubishi recalls · All 2024 recalls · Recall Archive home