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JMC N800 Light truck parts EGR COOLER CN3-9F464-AE
Listen-Autoparts.com
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JMC N800
Light truck parts
EGR COOLER
CN3-9F464-AE. Product Description. Brand :
JMC N800
Part No. : CN3-9F464-AE Weight : 2.76KG
People also ask
What are the symptoms of EGR cooler failure?
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AI Overview
Symptoms of a failed EGR cooler include
a visible leak or constant loss of coolant, white smoke or steam from the exhaust, engine overheating, and poor engine performance like rough idling and loss of power
.
You might also find coolant in the
EGR valve
,
appearing as a black, gooey mess instead of dry carbon, or notice a
sticking VGT turbo
.
Coolant-Related Symptoms
-
Low Coolant Level:Opens in new tabYou may need to frequently add coolant, but there are no obvious external leaks on the engine or ground.
-
Coolant in the EGR Valve:Opens in new tabInspect the EGR valve; a leaking EGR cooler can leave a slimy, black goo from the coolant mixing with exhaust soot, or a steam-cleaned appearance where it shouldn't be.
-
Bubbles in the Cooling System:Opens in new tabWith the engine running, check the coolant reservoir for bubbling, which indicates exhaust gases are entering the cooling system.
Exhaust & Engine Performance Symptoms
-
White Smoke from Exhaust:Opens in new tabCoolant leaking into the exhaust system turns into steam, creating white smoke, especially noticeable on startup.
-
Engine Overheating:Opens in new tabThe failure of the EGR cooler can lead to increased combustion chamber heat, causing the engine to overheat.
-
Loss of Power & Rough Idle:Opens in new tabAn imbalanced air-fuel ratio due to abnormal EGR flow can cause poor acceleration and a rough or uneven engine idle.
Other Indicators
-
Check Engine Light:Opens in new tabA warning light may activate due to detected low coolant levels, extreme temperatures, or other system faults, though it may not specifically identify the EGR cooler.
-
Sticking VGT Turbo:Opens in new tabCoolant can contaminate the VGT (Variable Geometry Turbocharger) , causing its vanes to stick and the turbo to malfunction.
What to Do
If you experience these symptoms, it's a strong indicator of a failing EGR cooler.
Addressing this issue promptly is crucial to prevent further, more severe engine damage, such as bent connecting rods or head gasket failure.
Consulting a mechanic is recommended to accurately diagnose the problem and prevent costly repairs.
-
How do I know if my EGR cooler is failing? - NatradWhite steam or smoke at the exhaust. Lowered coolant level with no visible leaks. External coolant leakage. Check engine light.Natrad
-
EGR Cooler Failure Symptoms and Solutions!Feb 12, 2020 — but over time this part can fail and the results can damage a number of different EGR components including the VGT tur...YouTube ·Highway and Heavy Parts
-
Signs & Symptoms of a Bad Diesel EGR Valve or EGR Cooler!Aug 4, 2024 — related issue you will typically get some type of check engine light and an engine code associated with it whether that...YouTube ·8020 Automotive
-
Learn what happens when an EGR cooler fails. - Bullet Proof DieselAug 14, 2024 — Diesel owners will commonly recognize this symptom in a few different ways. The first is that dreaded white smoke comi...Bullet Proof Diesel
-
Symptoms of a bad EGR coolerNov 13, 2010 — there are three major symptoms to a leaking EGR cooler the first symptom is white smoke when the EGR cooler starts to ...YouTube ·BulletProofDiesel
-
Bad EGR cooler or head gasketNov 13, 2010 — so often times if your EGR cooler goes bad there's a lot of confusion as to whether or not it's just an EGR cooler or ...YouTube ·BulletProofDiesel
-
7 Symptoms of a Failing EGR Cooler on your Cummins ISX EngineJan 20, 2023 — 1. Coolant loss and internal coolant leak * Coolant loss is one of the most common symptoms of a failing EGR cooler.FleetRun Truck Parts
-
EGR Coolers Common Problems and Solutions - Zillion Heavy Duty PartsAug 28, 2024 — White Smoke: When the EGR cooler leaks, coolant can mix with exhaust gases, creating steam that comes out as white smo...Blog content | Zillion Heavy Duty Parts
-
What are the Bad EGR Cooler Symptoms? - ancelApr 23, 2025 — Engine Performance Issues Loss of acceleration power, rough idling, increased fuel consumption. Abnormal EGR flow (exc...ANCEL Official Store
-
​Bad EGR Cooler: Symptoms to Watch For - BostechNov 9, 2021 — Check Engine Light Comes On The check engine light will likely come on if your EGR cooler fails. The system will usuall...Bostech Auto
-
Bad EGR Cooler Leaking Coolant? Guide for Trucks - APL CargoAug 27, 2025 — #1: Persistent and Unexplained Coolant Loss This is often the very first sign. You find yourself having to top off the...APL Cargo
-
Spotting Blown Head Gasket Symptoms [How to Prevent or Fix it]Jan 3, 2025 — What to Look For: Continuous bubbling in the radiator or coolant reservoir while the engine is running Coolant overflow...CRC Industries
-
Common Warning Signs Your Head Gasket Is Failing: Essential Signs and Symptoms GuideJun 13, 2025 — Another easy-to-spot clue is bubbles forming in the radiator or the coolant reservoir when the engine is running. Thes...wheelbasegarage.com
-
Pressure in the cooling system: how to identify and rectify problemsNormally, the coolant in the system circulates smoothly and evenly, so there should be no visible bubbles. However, if you notice ...Steel Seal - Zylinderkopfdichtung kostengünstig reparieren
AI responses may include mistakes.
Learn more
How do I know if my EGR cooler is failing? - Natrad
White steam or smoke at the exhaust. Lowered coolant level with no visible leaks. External coolant leakage. Check engine light.
Natrad
EGR Cooler Failure Symptoms and Solutions!
Feb 12, 2020 —
but over time this part can fail and the results can damage a number of different EGR components including the VGT tur...
YouTube
·
Highway and Heavy Parts
Signs & Symptoms of a Bad Diesel EGR Valve or EGR Cooler!
Aug 4, 2024 —
related issue you will typically get some type of check engine light and an engine code associated with it whether that...
YouTube
·
8020 Automotive
Learn what happens when an EGR cooler fails. - Bullet Proof Diesel
Aug 14, 2024 —
Diesel owners will commonly recognize this symptom in a few different ways. The first is that dreaded white smoke comi...
Bullet Proof Diesel
Symptoms of a bad EGR cooler
Nov 13, 2010 —
there are three major symptoms to a leaking EGR cooler the first symptom is white smoke when the EGR cooler starts to ...
YouTube
·
BulletProofDiesel
Bad EGR cooler or head gasket
Nov 13, 2010 —
so often times if your EGR cooler goes bad there's a lot of confusion as to whether or not it's just an EGR cooler or ...
YouTube
·
BulletProofDiesel
7 Symptoms of a Failing EGR Cooler on your Cummins ISX Engine
Jan 20, 2023 —
1. Coolant loss and internal coolant leak * Coolant loss is one of the most common symptoms of a failing EGR cooler.
FleetRun Truck Parts
EGR Coolers Common Problems and Solutions - Zillion Heavy Duty Parts
Aug 28, 2024 —
White Smoke: When the EGR cooler leaks, coolant can mix with exhaust gases, creating steam that comes out as white smo...
Blog content | Zillion Heavy Duty Parts
What are the Bad EGR Cooler Symptoms? - ancel
Apr 23, 2025 —
Engine Performance Issues Loss of acceleration power, rough idling, increased fuel consumption. Abnormal EGR flow (exc...
ANCEL Official Store
​Bad EGR Cooler: Symptoms to Watch For - Bostech
Nov 9, 2021 —
Check Engine Light Comes On The check engine light will likely come on if your EGR cooler fails. The system will usuall...
Bostech Auto
Bad EGR Cooler Leaking Coolant? Guide for Trucks - APL Cargo
Aug 27, 2025 —
#1: Persistent and Unexplained Coolant Loss This is often the very first sign. You find yourself having to top off the...
APL Cargo
Spotting Blown Head Gasket Symptoms [How to Prevent or Fix it]
Jan 3, 2025 —
What to Look For: Continuous bubbling in the radiator or coolant reservoir while the engine is running Coolant overflow...
CRC Industries
Common Warning Signs Your Head Gasket Is Failing: Essential Signs and Symptoms Guide
Jun 13, 2025 —
Another easy-to-spot clue is bubbles forming in the radiator or the coolant reservoir when the engine is running. Thes...
wheelbasegarage.com
Pressure in the cooling system: how to identify and rectify problems
Normally, the coolant in the system circulates smoothly and evenly, so there should be no visible bubbles. However, if you notice ...
Steel Seal - Zylinderkopfdichtung kostengünstig reparieren
Show more
What happens if you bypass the EGR cooler?
The vehicle continues to perform just fine and there's no other negative effect, at least short term - other than of course with an illuminated EML is an instant MOT failure
.
EGR Cooler Bypass Remap - UKCC Auto Techs
UKCC Auto Techs
https://carbon-cleaning.co.uk
› egr-cooler-bypass
UKCC Auto Techs
https://carbon-cleaning.co.uk
› egr-cooler-bypass
Is an EGR cooler necessary?
An EGR cooler is often necessary on diesel engines
(and newer, high-performance gasoline engines) to help cool exhaust gasses before they go back into the engine. To understand the purpose of an EGR cooler, basic understanding of the original EGR technology is required.
Aug 14, 2024
Learn what happens when an EGR cooler fails. - Bullet Proof Diesel
Bullet Proof Diesel
https://bulletproofdiesel.com
› blogs › diesel-tips-info › l...
Bullet Proof Diesel
https://bulletproofdiesel.com
› blogs › diesel-tips-info › l...
How often should an EGR cooler be replaced?
An AI Overview is not available for this search
Can't generate an AI overview right now. Try again later.
AI Overview
An EGR cooler doesn't have a fixed replacement schedule;
it is replaced only when it leaks coolant or becomes severely clogged
.
Signs of a failing EGR cooler include engine overheating, decreased fuel economy, white smoke, and Diagnostic Trouble Codes (DTCs) related to insufficient EGR cooling.
While a blockage can sometimes be cleaned, a leak or severe clogging may necessitate replacement.
Signs of a Failing EGR Cooler
-
White smoke or steam from the exhaust
:
This indicates a leak where coolant enters the intake system.
-
Engine overheating
:
A leak can reduce the EGR cooler's ability to cool exhaust gases, leading to engine temperature issues.
-
Decreased fuel economy
:
A clogged or malfunctioning cooler reduces the engine's efficiency.
-
Diagnostic Trouble Codes (DTCs)
:
The vehicle's computer may register codes for insufficient EGR cooling.
-
Coolant consumption
:
You may notice a drop in your coolant level without an obvious external leak.
When to Clean vs.
Replace
-
Cleaning :If the EGR cooler has simple carbon buildup or a clogged coolant line, it can often be cleaned to restore performance.
-
Replacement :If the EGR cooler has developed a leak or is severely clogged with solidified carbon, it needs to be replaced.
What shortens its life?
-
Upstream issues :Problems in other parts of the engine, like heavy carbon deposits, can lead to clogs in the EGR system.
-
Poor-quality or contaminated coolant :Using incorrect or old coolant can clog the internal coolant lines of the EGR cooler.
-
Driving conditions :Extreme conditions, such as heavy towing, dusty environments, or prolonged idling, can put more stress on the cooler and shorten its lifespan.
-
How do I know if my EGR cooler is failing? - NatradWhite steam or smoke at the exhaust White steam or smoke can be a sign that the EGR cooler has leaked internally and that coolant ...Natrad
-
How do I know if my EGR cooler is failing in my car?How do I know if my EGR cooler is bad? White steam or smoke at the exhaust Lowered coolant level with no visible leaks External co...natrad.com.au
-
Volvo truck EGR cooler replacement timing? - FacebookMar 12, 2025 — Alfred Varela you would only replace the cooler if it's leaking coolant. Signs of a leaking cooler are coolant consump...Facebook
-
What is an EGR Cooler and Why Do We Need Them?Aug 31, 2022 — What Happens When the EGR Cooler is Blocked? The average EGR cooler lasts about 80,000 miles or 128,7475km, though exi...Roadwarrior Inc
-
When To Replace EGR Valve For 6.7 Cummins - SPELABJan 20, 2025 — When to Replace EGR Valve 6.7 Cummins? Replacement frequency depends on driving conditions and engine usage: High-Usag...SPELAB
-
EGR Coolers, Turbo Failures, and Aftertreatment PerformanceFeb 7, 2024 — Common problems include leakage in the EGR cooler, which can lead to coolant contaminating the exhaust system, and turb...Roadwarrior Inc
-
Does Your Egr Valve Need Replacing? - The Filter BlogDec 17, 2023 — It will also mean worse fuel economy. Along with the EGR valve, it's worth keeping an eye on issues with the EGR coole...MicksGarage.com
-
Exhaust Gas Recirculation Explained: What It Is and How It WorksEGR coolers on light vehicles cannot be repaired and must be replaced. Costs vary based on the cooler's accessibility and price:The Torque Team
-
How does the EGR exhaust cooler work and why should it be regenerated?What are the first signs of EGR cooler damage? Decrease in power, loss of coolant, increase in fuel consumption, white smoke from ...arcoore.co.uk
-
What Can Go Wrong With the 7.3 Powerstroke EGR System?Dec 29, 2022 — If it ( EGR cooler ) starts to leak, it ( EGR cooler ) can cause the engine to overheat and lead to reduced performanc...JD Diagnostics & Diesel Repair
-
Car Maintenance Basics: Coolant Checks and RefillsDec 11, 2024 — Sudden Coolant Level Drop: A noticeable decrease in coolant level without visible signs of leakage points to an intern...Kassel Motorsports
-
Examining 5 Causes of DPF and EGR FailureJul 8, 2025 — Another cause is the failure of the EGR cooler. This component reduces the temperature of the recirculated exhaust gase...Blessed Performance
AI responses may include mistakes.
Learn more
How do I know if my EGR cooler is failing? - Natrad
White steam or smoke at the exhaust White steam or smoke can be a sign that the EGR cooler has leaked internally and that coolant ...
Natrad
How do I know if my EGR cooler is failing in my car?
How do I know if my EGR cooler is bad? White steam or smoke at the exhaust Lowered coolant level with no visible leaks External co...
natrad.com.au
Volvo truck EGR cooler replacement timing? - Facebook
Mar 12, 2025 —
Alfred Varela you would only replace the cooler if it's leaking coolant. Signs of a leaking cooler are coolant consump...
Facebook
What is an EGR Cooler and Why Do We Need Them?
Aug 31, 2022 —
What Happens When the EGR Cooler is Blocked? The average EGR cooler lasts about 80,000 miles or 128,7475km, though exi...
Roadwarrior Inc
When To Replace EGR Valve For 6.7 Cummins - SPELAB
Jan 20, 2025 —
When to Replace EGR Valve 6.7 Cummins? Replacement frequency depends on driving conditions and engine usage: High-Usag...
SPELAB
EGR Coolers, Turbo Failures, and Aftertreatment Performance
Feb 7, 2024 —
Common problems include leakage in the EGR cooler, which can lead to coolant contaminating the exhaust system, and turb...
Roadwarrior Inc
Does Your Egr Valve Need Replacing? - The Filter Blog
Dec 17, 2023 —
It will also mean worse fuel economy. Along with the EGR valve, it's worth keeping an eye on issues with the EGR coole...
MicksGarage.com
Exhaust Gas Recirculation Explained: What It Is and How It Works
EGR coolers on light vehicles cannot be repaired and must be replaced. Costs vary based on the cooler's accessibility and price:
The Torque Team
How does the EGR exhaust cooler work and why should it be regenerated?
What are the first signs of EGR cooler damage? Decrease in power, loss of coolant, increase in fuel consumption, white smoke from ...
arcoore.co.uk
What Can Go Wrong With the 7.3 Powerstroke EGR System?
Dec 29, 2022 —
If it ( EGR cooler ) starts to leak, it ( EGR cooler ) can cause the engine to overheat and lead to reduced performanc...
JD Diagnostics & Diesel Repair
Car Maintenance Basics: Coolant Checks and Refills
Dec 11, 2024 —
Sudden Coolant Level Drop: A noticeable decrease in coolant level without visible signs of leakage points to an intern...
Kassel Motorsports
Examining 5 Causes of DPF and EGR Failure
Jul 8, 2025 —
Another cause is the failure of the EGR cooler. This component reduces the temperature of the recirculated exhaust gase...
Blessed Performance
Show more
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Egr Cooler Outlet Pipe Upper for Jmc Vigus N800 Shunda ...
Made-in-China.com
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Egr Cooler
Outlet Pipe Upper for
Jmc
Vigus
N800
Shunda Baodian ; Car Make:
Jmc
; Product Name,
EGR cooler
outlet pipe for vigus ; Size, 20cm*5cm*5cm ; Weight, 1kg.
$4.00
·
In stock
·
5.0
·
Review by MIC_BUYER
·
Free delivery
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JMC N800 EGR COOLER
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N800 Technical Training - Engine JMC | PDF | Fuel Injection
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The document provides an overview of technical training on the
N800
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