Revotron 1.2T
14
4. Engine Noise
Condition
Possible Cause
Remedy
Engine 'pings' or 'knocks' while
accelerating or travelling uphill.
Improper grade of fuel
•
Fill fuel tank with a minimum BSIV
Fuel
Spark plugs excessively worn
or gapped improperly.
•
Inspect spark plugs. Replace if
worn.
Incorrect valve/ignition timing
•
Check timing system components
and repair or replace as necessary.
Excessively worn camshaft
•
Inspect camshaft lobes and run-out
for excessive wear. Replace as
necessary
Malfunctioning fuel pressure
regulator
•
Check fuel pressure regulator and
return line. Repair or replace as
necessary.
'Squeal' or 'chirping' while
engine is running.
Worn,
oil-fouled,
or
improperly adjusted engine
accessory belt.
•
Check engine accessory belt
condition and tension. Adjust or
replace.
Belt tensioner not properly
tightened or defective
•
Inspect the belt tensioners. Tighten
or replace as necessary.
'Clunking' or 'rapping' noise
from bottom end of engine
Defective piston wrist pin,
rod, or main bearings
•
If noise occurs after taking foot off
accelerator pedal, inspect piston
wrist pins.
•
If noise is constant inspect rod
bearings and main bearings for
proper clearance and condition
•
Replace bearings as necessary.
'Tapping' or 'ticking' noise from
the top end of the engine
Improper
valve
tappet
clearances
•
Check and adjust as necessary.
Fuel
injectors
worn
excessively
•
Fuel injectors will make some
ticking noise. Replace fuel injectors
if not putting out enough fuel to
cylinders.
Excessively worn camshaft
•
Inspect camshaft. lobes and runout
for excessive wear. Replace as
necessary.
Valve springs, tappets, or
rocker arms worn
•
Inspect valve train components;
replace as necessary.
5. Engine Smokes
Condition
Possible Cause
Remedy
Engine emits white smoke from
tailpipe
Obstructed air filter or air Inlet
•
Clean or replace air filter or Inlet.
Head gasket leaking coolant
into combustion chamber
•
Inspect engine oil for coolant and
perform engine compression test.
Engine cylinder head or block
cracked
•
Inspect engine oil for coolant and
perform engine compression test.
Engine oil or other substance
on exhaust manifold
•
Inspect exhaust manifold for
foreign material.
Improper
grade
or
contaminated fuel
•
Rush fuel system with fresh, clean,
fuel of the correct type. Replace
fuel filter.
