Vehicle diagnosed with injector blow-by after customer reported fumes. Faulty injector seal repaired to prevent engine damage and restore safe operation.
This vehicle came into 1Stop Motor Shop in Newtownabbey with the customer complaining of strong fumes while driving.
After inspection, we diagnosed injector blow-by — a failure of the injector seal allowing combustion gases to escape from the cylinder head.
Left untreated, this issue can cause serious engine damage and strong exhaust smells.
The faulty injector seal was repaired, restoring proper engine sealing and eliminating the fumes.
Injector blow-by happens when the copper sealing washer at the base of a diesel injector fails.
Combustion gases escape
Carbon builds up around the injector
Strong exhaust fumes develop
Engine ticking or chuffing noise may appear
Risk of injector seizure over time
It’s a common diesel fault but one that needs addressing quickly.
In this case, fumes were the key warning sign.
Smell of exhaust fumes
Black carbon build-up around injectors
Ticking noise from engine
Reduced performance
Increased fuel consumption
Early detection prevents costly cylinder head repairs.
If you’re driving around Newtownabbey, Belfast, or surrounding areas, injector blow-by should not be ignored.
Escaping gases can damage the cylinder head
Injectors can seize in place
Carbon build-up worsens over time
Strong fumes can enter ventilation system
Repair costs increase the longer it’s left
Quick diagnosis keeps the repair straightforward.
Once identified, we carried out the necessary repair.
Injector removed safely
Carbon cleaned from seat area
New sealing washer fitted
Injector refitted and torqued correctly
Engine tested for leaks
The vehicle was returned to the road with the issue fully resolved.
Injector faults require precision and experience.
Experienced diesel diagnostics
Proper injector seat cleaning procedures
Honest fault identification
No unnecessary replacements
Trusted local garage in Newtownabbey
Strong smells are never normal. Early inspection prevents bigger engine damage. Get in contact with one of our trusted mechanics today:
1Stop Motor Shop – Newtownabbey, serving:
Belfast, Mallusk, Glengormley, Jordanstown, Whiteabbey, Carnmoney, Mossley, Monkstown & Ballyrobert.
