Fort Worth Automotiv Engine Service at Jobob Automotive Services


	Jobob Automotive Services AAA Approved Auto Repair Service Station Fort Worth Auto Repair Specialists
	Home Awards Staff Newsletter Map to Shop Warranty Links


	Join Our Mailing List
	» JOIN NOW

SERVICES
Air Conditioning
Brakes
Computer Diagnostics
Cooling System
CV Boot & Axel
Driveshaft
Electrical System
Emissions System
Engines
Oil Change / Lube
Starting System
Steering System
Suspension / Alignment
Tires and Wheels
Transmissions
Tune Up

SERVICING:
Domestic Autos/Trucks
Foreign Autos/Trucks
Classic Autos/Trucks

American Express MasterCard Visa Discover Credit Cards

3970 W. Vickery Blvd.
Fort Worth, TX 76107
(817) 738-5912
(817) 738-5919
(817) 731-3806 (fax)
info@Jobobservice.com

Website Design from Out of Nowhere

Engines

Engine Service at Jobob Automotive Service What is your car without it's engine? It may be a comfortable place to sit and watch the grass grow, but nobody owns a car to let the grass grow around it. Keep the engine running like it was a new car with our automobile repair experts. We can diagnose your engine's problems and make professional repairs.

What is your Engines Mechanical Problem?

Problem	Possible Cause	Remedy/Repair
External oil leaks	Cylinder head cover RTV sealant broken or improperly seated Oil filler cap leaking or missing Oil filter gasket broken or improperly seated Oil pan side gasket broken, improperly seated or opening in RTV sealant Oil pan front oil seal broken or improperly seated Oil pan rear oil seal broken or improperly seated Timing case cover oil seal broken or improperly seated Excess oil pressure because of restricted PCV valve Oil pan drain plug loose or has stripped threads Rear oil gallery plug loose Rear camshaft plug loose or improperly seated	Replace sealant; inspect cylinder head cover sealant flange and cylinder head sealant surface for distortion and cracks Replace cap Replace oil filter Replace gasket or repair opening in sealant; inspect oil pan gasket flange for distortion Replace seal; inspect timing case cover and oil pan seal flange for distortion Replace seal; inspect oil pan rear oil seal flange; inspect rear main bearing cap for cracks, plugged oil return channels, or distortion in seal groove Replace seal Replace PCV valve Repair as necessary and tighten Use appropriate sealant on gallery plug and tighten Seat camshaft plug or replace and seal, as necessary
Excessive oil consumption	Oil level too high Oil with wrong viscosity being used PCV valve stuck closed Valve stem oil deflectors (or seals) are damaged, missing, or incorrect type Valve stems or valve guides worn Poorly fitted or missing valve cover baffles Piston rings broken or missing Scuffed piston Incorrect piston ring gap Piston rings sticking or excessively loose in grooves Compression rings installed upside down Cylinder walls worn, scored, or glazed Piston ring gaps not properly staggered Excessive main or connecting rod bearing clearance	Drain oil to specified level Replace with specified oil Replace PCV valve Replace valve stem oil deflectors Measure stem-to-guide clearance and repair as necessary Replace valve cover Replace broken or missing rings Replace piston Measure ring gap, repair as necessary Measure ring side clearance, repair as necessary Repair as necessary Repair as necessary Repair as necessary Measure bearing clearance, repair as necessary
No oil pressure	Low oil level Oil pressure gauge, warning lamp or sending unit inaccurate Oil pump malfunction Oil pressure relief valve sticking Oil passages on pressure side of pump obstructed Oil pickup screen or tube obstructed Loose oil inlet tube	Add oil to correct level Replace oil pressure gauge or warning lamp Replace oil pump Remove and inspect oil pressure relief valve assembly Inspect oil passages for obstruction Inspect oil pickup for obstruction Tighten or seal inlet tube
Low oil pressure	Low oil level Inaccurate gauge, warning lamp or sending unit Oil excessively thin because of dilution, poor quality, or improper grade Excessive oil temperature Oil pressure relief spring weak or sticking Oil inlet tube and screen assembly has restriction or air leak Excessive oil pump clearance Excessive main, rod, or camshaft bearing clearance	Add oil to correct level Replace oil pressure gauge or warning lamp Drain and refill crankcase with recommended oil Correct cause of overheating engine Remove and inspect oil pressure relief valve assembly Remove and inspect oil inlet tube and screen assembly. (Fill inlet tube with lacquer thinner to locate leaks.) Measure clearances Measure bearing clearances, repair as necessary
High oil pressure	Improper oil viscosity Oil pressure gauge or sending unit inaccurate Oil pressure relief valve sticking closed	Drain and refill crankcase with correct viscosity oil Replace oil pressure gauge Remove and inspect oil pressure relief valve assembly
Main bearing noise	Insufficient oil supply Main bearing clearance excessive Bearing insert missing Crankshaft end-play excessive Improperly tightened main bearing cap bolts Loose flywheel or drive plate Loose or damaged vibration damper	Inspect for low oil level and low oil pressure Measure main bearing clearance, repair as necessary Replace missing insert Measure end-play, repair as necessary Tighten bolts with specified torque Tighten flywheel or drive plate attaching bolts Repair as necessary
Connecting rod bearing noise	Insufficient oil supply Carbon build-up on piston Bearing clearance excessive or bearing missing Crankshaft connecting rod journal out-of-round Misaligned connecting rod or cap Connecting rod bolts tightened improperly	Inspect for low oil level and low oil pressure Remove carbon from piston crown Measure clearance, repair as necessary Measure journal dimensions, repair or replace as necessary Repair as necessary Tighten bolts with specified torque
Piston noise	Piston-to-cylinder wall clearance excessive (scuffed piston) Cylinder walls excessively tapered or out-of-round Piston ring broken Loose or seized piston pin Connecting rods misaligned Piston ring side clearance excessively loose or tight Carbon build-up on piston is excessive	Measure clearance and examine piston Measure cylinder wall dimensions re-bore cylinder Replace all rings on piston Measure piston-to-pin clearance, repair as necessary Measure rod alignment, straighten or replace Measure ring side clearance, repair as necessary Remove carbon from piston
Valve actuating component noise	Insufficient oil supply Rocker arms or pivots worn Foreign objects or chips in hydraulic tappets Excessive tappet leak-down Tappet face worn Broken or cocked valve springs Stem-to-guide clearance excessive Valve bent Loose rocker arms Valve seat run-out excessive Missing valve lock Excessive engine oil	Check for: (a) Low oil level (b) Low oil pressure (c) Wrong hydraulic tappets (d) Restricted oil gallery (e) Excessive tappet to bore clearance Replace worn rocker arms or pivots Clean tappets Replace valve tappet Replace tappet; inspect corresponding cam lobe for wear Properly seat cocked springs; replace broken springs Measure stem-to-guide clearance, repair as required Replace valve Check and repair as necessary Regrind valve seat/valves Install valve lock Correct oil level

What is your Engines Performance Problem?

Problem	Possible Cause	Remedy/Repair
Hard starting (Engine cranks normally)	Faulty engine control system component Faulty fuel pump Faulty fuel system component Faulty ignition coil Improper spark plug gap Incorrect ignition timing Incorrect valve timing	Repair or replace as necessary Replace fuel pump Repair or replace as necessary Test and replace as necessary Adjust gap Adjust timing Check valve timing; repair as necessary
Rough idle or stalling	Incorrect curb or fast idle spec Incorrect ignition timing Faulty EGR valve operation Faulty PCV valve air flow Faulty TAC vacuum motor or valve Air leak into manifold vacuum Faulty distributor rotor or cap Improperly seated valves Incorrect ignition wiring Faulty ignition coil Restricted air vent or idle passages Restricted air cleaner	Adjust curb or fast idle speed (if possible) Adjust timing to specification Test EGR system and replace as necessary Test PCV valve and replace as necessary Repair as necessary Inspect manifold vacuum connections and repair as necessary Replace rotor or cap (Distributor systems only) Test cylinder compression, repair as necessary Inspect wiring and correct as necessary Test coil and replace as necessary Clean passages Clean or replace air cleaner filter element
Faulty low speed operation	Restricted idle air vents and passages Restricted air cleaner Faulty spark plugs Dirty, corroded, or loose igniter secondary circuit wire connections Faulty ignition coil high voltage wire Faulty distributor cap	Clean air vents and passages Clean or replace air cleaner filter element Clean or replace spark plugs Clean or tighten secondary circuit wire connections Replace ignition coil high voltage wire (Distributor systems only) Replace cap (Distributor systems only)
Faulty acceleration	Incorrect ignition timing Faulty fuel system component Faulty spark plug(s) Improperly seated valves Faulty ignition coil	Adjust timing Repair or replace as necessary Clean or replace spark plug(s) Test cylinder compression, repair as necessary Test coil and replace as necessary
Faulty high speed operation	Incorrect ignition timing Faulty advance mechanism Low fuel pump volume Wrong spark plug air gap or wrong plug Partially restricted exhaust manifold, exhaust pipe, catalytic converter, muffler, or tailpipe Restricted vacuum passages Restricted air cleaner Faulty distributor rotor or cap Faulty ignition coil Improperly seated valve(s) Faulty valve spring(s) Incorrect valve timing Intake manifold restricted Worn distributor shaft	Adjust timing (if possible) Check advance mechanism and repair as necessary (Distributor systems only) Replace fuel pump Adjust air gap or install correct plug Eliminate restriction Clean passages Cleaner or replace filter element as necessary Replace rotor or cap (Distributor systems only) Test coil and replace as necessary Test cylinder compression, repair as necessary Inspect and test valve spring tension, replace as necessary Check valve timing and repair as necessary Remove restriction or replace manifold Replace shaft (Distributor systems only)
Misfire at all speeds	Faulty spark plug(s) Faulty spark plug wire(s) Faulty distributor cap or rotor Faulty ignition coil Primary ignition circuit shorted or open intermittently Improperly seated valve(s) Faulty hydraulic tappet(s) Faulty valve spring(s) Worn camshaft lobes Air leak into manifold Fuel pump volume or pressure low Blown cylinder head gasket Intake or exhaust manifold passage(s) restricted	Clean or replace spark plug(s) Replace as necessary Replace cap or rotor (Distributor systems only) Test coil and replace as necessary Troubleshoot primary circuit and repair as necessary Test cylinder compression, repair as necessary Clean or replace tappet(s) Inspect and test valve spring tension, repair as necessary Replace camshaft Check manifold vacuum and repair as necessary Replace fuel pump Replace gasket Pass chain through passage(s) and repair as necessary
Power not up to normal	Incorrect ignition timing Faulty distributor rotor Incorrect spark plug gap Faulty fuel pump Incorrect valve timing Faulty ignition coil Faulty ignition wires Improperly seated valves Blown cylinder head gasket Leaking piston rings	Adjust timing Replace rotor (Distributor systems only) Adjust gap Replace fuel pump Check valve timing and repair as necessary Test coil and replace as necessary Test wires and replace as necessary Test cylinder compression and repair as necessary Replace gasket Test compression and repair as necessary
Intake backfire	Improper ignition timing Defective EGR component Defective TAC vacuum motor or valve	Adjust timing Repair as necessary Repair as necessary
Exhaust backfire	Air leak into manifold vacuum Faulty air injection diverter valve Exhaust leak	Check manifold vacuum and repair as necessary Test diverter valve and replace as necessary Locate and eliminate leak
Ping or spark knock	Incorrect ignition timing Distributor advance malfunction Excessive combustion chamber deposits Air leak into manifold vacuum Excessively high compression Fuel octane rating excessively low Sharp edges in combustion chamber EGR valve not functioning properly	Adjust timing Inspect advance mechanism and repair as necessary (Distributor systems only) Remove with combustion chamber cleaner Check manifold vacuum and repair as necessary Test compression and repair as necessary Try alternate fuel source Grind smooth Test EGR system and replace as necessary
Surging (at cruising to top speeds)	Low fuel pump pressure or volume Improper PCV valve air flow Air leak into manifold vacuum Incorrect spark advance Restricted fuel filter Restricted air cleaner EGR valve not functioning properly	Replace fuel pump Test PCV valve and replace as necessary Check manifold vacuum and repair as necessary Test and replace as necessary Replace fuel filter Clean or replace air cleaner filter element Test EGR system and replace as necessary