In September 1994, Isuzu filed an improvement campaign with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Cooling system, covering the Elf. The filing affects 72,293 vehicles manufactured between May 17, 1993 and August 20, 1994.
Overview
| MLIT filing number | 2100850 |
|---|---|
| Type | Improvement Campaign (manufacturer improvement measure / 改善対策) |
| Date filed | September 20, 1994 |
| Manufacturer(s) | Isuzu |
| Component | Cooling system |
| Production period | May 17, 1993 — August 20, 1994 |
| Vehicles affected | 72,293 units |
Filing in context
The Cooling system is the most frequently cited component category in this archive, appearing in 14 of its 4,890 filings. This filing is one of 5 Isuzu notifications from 1994 in this archive. For scale, 613 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 1 year and 3 months.
Issue
If the engine overheats and use continues without correction, steam pressure causes the coolant auxiliary tank (sub-tank) to expand. This expansion crushes and blocks the overflow pipe routed between the sub-tank and the mudguard—the pipe responsible for discharging excess coolant. In the worst case, the sub-tank cap is forced off and coolant is ejected.
Corrective action
On all vehicles, change the material and routing position of the overflow pipe.
Affected models & chassis ranges
This filing lists 55 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 |
|---|---|---|
| U-NHR69C | Elf | NHR69C-7400013 — NHR69C-7402302 |
| U-NHR69CA | Elf | NHR69C-7400013 — NHR69C-7402302 |
| U-NHR69CAVN | Elf | NHR69C-7400013 — NHR69C-7402302 |
| U-NHR69CV | Elf | NHR69C-7400013 — NHR69C-7402302 |
| U-NHR69E | Elf | NHR69E-7400036 — NHR69E-7409263 |
| U-NHR69EA | Elf | NHR69E-7400036 — NHR69E-7409263 |
| U-NHR69EAVN | Elf | NHR69E-7400036 — NHR69E-7409263 |
| U-NHR69EVN | Elf | NHR69E-7400036 — NHR69E-7409263 |
| U-NHS69EA | Elf | NHS69E-7400015 — NHS69E-7402309 |
| U-NHS69EAVN | Elf | NHS69E-7400015 — NHS69E-7402309 |
| U-NKR58EA | Elf | NKR58E-7400010 — NKR58E-7406589 |
| U-NKR58EAVN | Elf | NKR58E-7400010 — NKR58E-7406589 |
| U-NKR58LAR | Elf | NKR58L-7400008 — NKR58L-7401575 |
| U-NKR58LAVN | Elf | NKR58L-7400008 — NKR58L-7401575 |
| U-NKR63E | Elf | NKR63E-7400012 — NKR63E-7402190 |
| U-NKR63ED | Elf | NKR63E-7400012 — NKR63E-7402190 |
| U-NKR63EPN | Elf | NKR63E-7400012 — NKR63E-7402190 |
| U-NKR63LR | Elf | NKR63L-7400002 — NKR63L-7400190 |
| U-NKR66E | Elf | NKR66E-7400052 — NKR66E-7430475 |
| U-NKR66E2N | Elf | NKR66E-7400052 — NKR66E-7430475 |
| U-NKR66EA | Elf | NKR66E-7400052 — NKR66E-7430475 |
| U-NKR66EAVN | Elf | NKR66E-7400052 — NKR66E-7430475 |
| U-NKR66ED | Elf | NKR66E-7400052 — NKR66E-7430475 |
| U-NKR66EN | Elf | NKR66E-7400052 — NKR66E-7430475 |
| U-NKR66EPN | Elf | NKR66E-7400052 — NKR66E-7430475 |
| U-NKR66GAVN | Elf | NKR66G-7400014 — NKR66G-7401241 |
| U-NKR66GN | Elf | NKR66G-7400014 — NKR66G-7401241 |
| U-NKR66LAR | Elf | NKR66L-7400027 — NKR66L-7405115 |
| U-NKR66LAVN | Elf | NKR66L-7400027 — NKR66L-7405115 |
| U-NKR66LR | Elf | NKR66L-7400027 — NKR66L-7405115 |
| U-NKR66LVN | Elf | NKR66L-7400027 — NKR66L-7405115 |
| U-NKR66LZN | Elf | NKR66LZ-7400003 — NKR66LZ-7400006 |
| U-NKR69CAEG | Elf | NKR69C-7400003 — NKR69C-7400249 |
| U-NKR69EA | Elf | NKR69E-7400012 — NLR69E-7401783 |
| U-NKR69EAVN | Elf | NKR69E-7400012 — NLR69E-7401783 |
| U-NKS66GDR | Elf | NKS66G-7400020 — NKR66G-7400934 |
| U-NKS66GR | Elf | NKS66G-7400020 — NKR66G-7400934 |
| U-NPR66GDR | Elf | NPR66G-7400005 — NPR66G-7401996 |
| U-NPR66GR | Elf | NPR66G-7400005 — NPR66G-7401996 |
| U-NPR66GVN | Elf | NPR66G-7400005 — NPR66G-7401996 |
| U-NPR66GYN | Elf | NPR66GY-7400002 — NPR66GY-7400084 |
| U-NPR66LR | Elf | NPR66L-7400028 — NPR66L-7411952 |
| U-NPR66LVN | Elf | NPR66L-7400028 — NPR66L-7411952 |
| U-NPR66LZN | Elf | NPR66LZ-7400006 — NPR66LZ-7400027 |
| U-NPR66PR | Elf | NPR66P-7400019 — NPR66P-7403757 |
| U-NPR66PVN | Elf | NPR66P-7400019 — NPR66P-7403757 |
| U-NPR70GDR | Elf | NPR70G-7400004 — NPR70G-7400259 |
| U-NPR70LR | Elf | NPR70L-7400017 — NPR70L-7400715 |
| U-NPR70LVN | Elf | NPR70L-7400017 — NPR70L-7400715 |
| U-NPR70LYR | Elf | NPR70LY-7400004 — NPR70LY-7400589 |
| U-NPR70PR | Elf | NPR70P-7400005 — NPR70P-7400627 |
| U-NPR70PVN | Elf | NPR70P-7400005 — NPR70P-7400627 |
| U-NPR70PYR | Elf | NPR70PY-7400006 — NPR70PY-7400627 |
| U-NPS66GN | Elf | NPS66G-7400002 — NPS66G-7400032 |
| U-NPS66LN | Elf | NPS66L-7400009 — NPS66L-7400265 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
万一原動機が加熱（オーバーヒート）し、そのままの状態で使用を続けると、冷却水補 助タンク（サブタンク）が蒸気圧力により膨張し、当該サブタンクと泥除けとの間に配管 されている余剰冷却水を排出するパイプ（オーバーフローパイプ）が押し潰され閉塞し、 最悪の場合、サブタンクの蓋（キャップ）が外れて冷却水が噴出するおそれがある。
改善措置
全車両、オーバーフローパイプの材質及び配管位置を変更する。
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=3008549
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