Thread Repair Services
Pear Tree Engineering
Broken bolts and studs
Glow plugs and Injectors
Repair damaged internal threads
Mobile service available
Sale of repair
kits and inserts
Removal of broken glow plugs in
without removing the cylinder head.
We specialise in the removal of
broken glow plugs which can be done in situ
without the expense of removing the head, at your premises or ours.
When a diesel
fails, it often results from bad glow plugs. Similar
to gasoline engine spark plugs, glow plugs assist diesel engine
cylinders in the combustion process. Rather than using an electrical
spark, glow plugs have heating elements that gradually heat up and
help drive the cylinders. These heating elements are quite delicate,
so knowing how to use special glow plug extraction tools plays a
crucial role in successful glow plug removal.
The aluminium head diesels are
notorious for seizing glow plugs. Apparently the plugs don't seat
properly at the combustion chamber end.
This allows carbon to get packed in around the barrel. Over time the
plugs become glued into place.
The narrow neck between the hex nut and the threaded shaft isn't up
to the task of undoing the plug and it snaps.
Glow Plug Tip Removal
We can now removing broken glow
plug electrode tips stuck in the cylinder head
without removing the head with very high success rates.
on site mobile service to remove broken heater or glow plugs
The removal of seized injectors in
the cylinder head problem is becoming increasingly
common and potentially a very expensive problem to
Our technicians are equipped with the best and
largest range of the latest Hydraulic Extraction
tools including the leading Pichler hydraulic
injector puller tool with pulling capabilities up to
20 tons, meaning that our injector removal success
rate is near perfect.
We can remove the majority of
injectors and have all of the necessary tooling to
provide a cost effective repair.
We are even able to remove injectors that have been
damaged; for instance if the threads have been
damaged or broken off, even if the injector has
snapped leaving parts stuck in the cylinder head.
We can remove:
- Seized Injectors.
- Broken or Snapped Injectors.
- Injectors that have been welded
- Damaged and manipulated injectors.
- Bosch, Siemens, Delphi and Denso
We can also remove:
- Broken and seized injector clamp
- Snapped, broken and seized
- Replace cylinder head injector
sleeves on 1.6 DV6 HDI engines.
Broken Injector Clamp Bolts
clam bolts can be seized in or snapped, we
can drill out broken or seized injector
clamp bolts and re-thread
or install inserts at the same time or on
a separate occasion