Question about 1999 Volkswagen Passat

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Vespa et2 Engine

I have disassembled the engine and removed the cylinder and piston from my Vespa ET2. The shaft would spin freely when i first removed the cylinder and piston and now it's not moving at all. Can somebody explain what happened and how i can get it to spin again? I want to make sure the fact that it’s blocked will still allow me to mount the engine back on the scooter and it will still work Any help would be appreciated. Thanks

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  • Master
  • 713 Answers

There might be a workshop manual for it here
Free Piaggio and Vespa Motorcycle Service Manuals for download
or i have some here
vespa

Posted on Jul 06, 2017

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tripletauto
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SOURCE: need engine help please

SOUNDS LIKE VALVES WERE HITTING THE PISTONS SEE ANY EYEBROW MARKS ON PISTONS? IF NOT HAVE VALVE JOB DONE ON HEAD

Posted on Aug 18, 2008

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can you get some small vice grips on the bolt, to hold it while you wrench it off.  Simply replace the bolt if you mess up the threads.

Posted on Mar 23, 2009

  • 114 Answers

SOURCE: timing belt broke

Did it die with a bang?
normally you will have to pull the head off but the other way is to pry or push down on all the valves and see if they all move freely and pop back up to closed,this will tell you if you have bent a stem but will not tell you if you have bent the head of the valve.
I strongly suggest removing the head because you should also inspect the top of the pistons since they are what would hit the valve,this may save you from spending time and money for nothing

Posted on Mar 25, 2009

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Can pistons be changed without pulling engine


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Jul 05, 2011 | 1984 Pontiac Fiero

1 Answer

Need to remove cilinderhead from a chevrolet trailblazer 2003


below are the instruction you well need to remove head .....good luck Removal Procedure
  1. Remove the air cleaner element.
  2. Remove the air cleaner outlet resonator. .
  3. Remove the powertrain control module (PCM) and engine wire harness bracket and related hoses and connections.
  4. Remove the generator.
  5. Remove the intake manifold.
  6. Remove the exhaust manifold. Do not remove the exhaust pipe from the manifold. Only have the manifold pushed off to the side of the engine.
  7. Position the A/C line out of the way towards the front of the vehicle.
  8. Disconnect the following cross-vehicle engine wiring harness connectors:
  9. • Engine coolant temperature sensor • Manifold absolute pressure (MAP) sensor • Ignition coils • Harness clamps at power steering pump • Wiring harness fastener at the right front inner fender • Throttle body • Camshaft sensors • Camshaft actuators • Fuel rail • Heated oxygen sensor (HO2S)
  10. Set aside the cross-vehicle engine wiring harness on the left side of the vehicle.
  11. Remove the camshaft cover.
  12. Partially drain the cooling system.

  13. Before performing one of the top dead center (TDC) procedures, break loose both the exhaust and intake camshaft sprocket bolts. Use a 25 mm (1 in) open end wrench on the camshaft hexes to hold the camshaft from turning. DO NOT remove the bolts.
  14. Perform one of the following methods for the service timing procedure.
  15. First Method--Rotate the engine clockwise by hand to TDC on the compression stroke by using a piston TDC indicator tool and/or dial indicator in the number 1 cylinder.
  16. First Method (continued)--The TDC indicator tool graduation marks on the shaft should note top of the piston stroke.
  17. First Method (continued)--When the piston is at TDC, the flats at the rear of the camshafts will be facing up and level when using a straight edge across the camshaft flats.
  18. Second Method--Rotate the crankshaft in the engine rotational direction clockwise until the number 1 piston is at TDC on the compression stroke. The word Delphi on the exhaust camshaft position actuator will be parallel with the cylinder head to cam cover mating surface. When the piston is at TDC, the flats at the rear of the camshafts will be facing up and level when using a straight edge across the camshaft flats. A 0.005 inch feeler gauge should not slide under the straight edge (1).
  19. Use a white paint pen or equivalent to place a reference mark on the harmonic balancer to the front cover for alignment purposes.
  20. Lower the vehicle.
  21. Important: If the timing is correct (TDC compression stroke number 1 cylinder), the camshaft flats will be in the up position.
    Install J 44221 to the back of the camshafts.
  22. Remove the upper timing chain guide to the cylinder head.
  23. Clean the timing chain and gears with brake cleaner or suitable solvent. Use a white paint pen or equivalent to place a reference mark on both timing gear sprockets and the timing chain to mark location prior to disassembly. It is recommended that the paint marks be in the 12 o'clock position.

  24. Install EN-48464 . It is important to install the tool with the proper orientation and to ensure that it is seated square against the timing chain and against the timing cover center bolt.


  25. The narrow ramp of the wedge tool needs to be placed so that it faces the timing chain.
  26. The wedge tool should be lightly seated using a couple of very light taps with a small plastic or brass hammer. The wedge tool will be fully seated against the tensioner after it moves about 25 mm (1 in).
  27. Once the tool is correctly installed, unscrew the handle and remove the handle

  28. Remove both upper cylinder head access hole plugs from the front of the cylinder head.
  29. Remove the 1 long and 2 short cylinder head bolts next to the exhaust and intake timing chain tensioner shoes and discard the bolts.
  30. Remove both upper timing chain tensioner shoe bolts.
  31. Remove the exhaust and the intake camshaft sprocket bolts. Discard the bolts.


  32. Carefully remove the exhaust and intake camshaft sprockets with the timing chain from the exhaust and intake camshafts. The illustration shows the exhaust camshaft sprocket already removed.


  33. Remove the sprockets from the chain, tie a piece of mechanic's wire on the timing chain and let it drop.


  34. Before removing the cylinder head bolts, use a drift punch and hammer to shock the bolts. This will ensure that the cylinder head bolts will not strip out the threads in the engine block or break. If a bolt breaks during engine disassembly, EN-47702 is available to assist in the removal of the remaining bolt segment.
  35. Remove the cylinder head bolts. Discard the bolts.
  36. Remove the cylinder head.
  37. Place the cylinder head on a flat, clean surface with the combustion chambers face up, in order to prevent damage to the deck face.
  38. Remove the cylinder head gasket.
  39. Discard the gasket.
  40. Remove all remaining gasket material from the engine block.
  41. Inspect the cylinder head gasket mating surface on the engine block.
  42. Clean and inspect the cylinder head.
  43. Disassemble the cylinder head if necessary.

May 23, 2011 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

The engine has blown. I need to replace it or change pistons and rings. How difficult is it to change pistons and rings?


It can be time consuming and the end result may not be desirable if you haven't done it before.
--- The following is just a sample of what to do once the engine is torn down: Pistons and Connecting Rods
  1. Before installing the piston/connecting rod assembly, oil the pistons, piston rings and the cylinder walls with light engine oil. Install connecting rod bolt protectors or rubber hose onto the connecting rod bolts/studs. Also perform the following:
    1. Select the proper ring set for the size cylinder bore.
    2. Position the ring in the bore in which it is going to be used.
    3. Push the ring down into the bore area where normal ring wear is not encountered.
    4. Use the head of the piston to position the ring in the bore so that the ring is square with the cylinder wall. Use caution to avoid damage to the ring or cylinder bore.
    5. Measure the gap between the ends of the ring with a feeler gauge. Ring gap in a worn cylinder is normally greater than specification. If the ring gap is greater than the specified limits, try an oversize ring set. Fig. 5: Checking the piston ring-to-ring groove side clearance using the ring and a feeler gauge tccs3923.gif

    6. Check the ring side clearance of the compression rings with a feeler gauge inserted between the ring and its lower land according to specification. The gauge should slide freely around the entire ring circumference without binding. Any wear that occurs will form a step at the inner portion of the lower land. If the lower lands have high steps, the piston should be replaced. Fig. 6: The notch on the side of the bearing cap matches the tang on the bearing insert tccs3917.gif

  2. Unless new pistons are installed, be sure to install the pistons in the cylinders from which they were removed. The numbers on the connecting rod and bearing cap must be on the same side when installed in the cylinder bore. If a connecting rod is ever transposed from one engine or cylinder to another, new bearings should be fitted and the connecting rod should be numbered to correspond with the new cylinder number. The notch on the piston head goes toward the front of the engine.
  3. Install all of the rod bearing inserts into the rods and caps. Fig. 7: Most rings are marked to show which side of the ring should face up when installed to the piston tccs3222.gif

  4. Install the rings to the pistons. Install the oil control ring first, then the second compression ring and finally the top compression ring. Use a piston ring expander tool to aid in installation and to help reduce the chance of breakage. Fig. 8: Install the piston and rod assembly into the block using a ring compressor and the handle of a hammer tccs3914.gif

  5. Make sure the ring gaps are properly spaced around the circumference of the piston. Fit a piston ring compressor around the piston and slide the piston and connecting rod assembly down into the cylinder bore, pushing it in with the wooden hammer handle. Push the piston down until it is only slightly below the top of the cylinder bore. Guide the connecting rod onto the crankshaft bearing journal carefully, to avoid damaging the crankshaft.
  6. Check the bearing clearance of all the rod bearings, fitting them to the crankshaft bearing journals. Follow the procedure in the crankshaft installation above.
  7. After the bearings have been fitted, apply a light coating of assembly oil to the journals and bearings.
  8. Turn the crankshaft until the appropriate bearing journal is at the bottom of its stroke, then push the piston assembly all the way down until the connecting rod bearing seats on the crankshaft journal. Be careful not to allow the bearing cap screws to strike the crankshaft bearing journals and damage them.
  9. After the piston and connecting rod assemblies have been installed, check the connecting rod side clearance on each crankshaft journal.
  10. Prime and install the oil pump and the oil pump intake tube.
  11. Install the auxiliary/balance shaft(s)/assembly(ies).
OHV Engines CAMSHAFT, LIFTERS AND TIMING ASSEMBLY
  1. Install the camshaft.
  2. Install the lifters/followers into their bores.
  3. Install the timing gears/chain assembly.
CYLINDER HEAD(S)
  1. Install the cylinder head(s) using new gaskets.
  2. Assemble the rest of the valve train (pushrods and rocker arms and/or shafts).
OHC Engines CYLINDER HEAD(S)
  1. Install the cylinder head(s) using new gaskets.
  2. Install the timing sprockets/gears and the belt/chain assemblies.
Engine Covers and Components Install the timing cover(s) and oil pan. Refer to your notes and drawings made prior to disassembly and install all of the components that were removed. Install the engine into the vehicle. Engine Start-up and Break-in STARTING THE ENGINE Now that the engine is installed and every wire and hose is properly connected, go back and double check that all coolant and vacuum hoses are connected. Check that your oil drain plug is installed and properly tightened. If not already done, install a new oil filter onto the engine. Fill the crankcase with the proper amount and grade of engine oil. Fill the cooling system with a 50/50 mixture of coolant/water.
  1. Connect the vehicle battery.
  2. Start the engine. Keep your eye on your oil pressure indicator; if it does not indicate oil pressure within 10 seconds of starting, turn the vehicle OFF. WARNING
    Damage to the engine can result if it is allowed to run with no oil pressure. Check the engine oil level to make sure that it is full. Check for any leaks and if found, repair the leaks before continuing. If there is still no indication of oil pressure, you may need to prime the system.
  3. Confirm that there are no fluid leaks (oil or other).
  4. Allow the engine to reach normal operating temperature (the upper radiator hose will be hot to the touch).
  5. At this point any necessary checks or adjustments can be performed, such as ignition timing.
  6. Install any remaining components or body panels which were removed. prev.gif next.gif

Oct 17, 2010 | 1995 Ford Thunderbird

1 Answer

I dont know how to put my spark plug wires in my car


firing order 1-4-2-5-3-6

  1. Insert each ignition wire on proper terminal of distributor cap . Ensure ignition wires are properly seated on the terminals. The No. 1 terminal is identified on distributor cap .
not sure if #1 cylinder is on the front right or front left. Call a dealer.
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Installation
Before installing distributor , visually inspect distributor . Inspect the O-ring. It should fit tightly and be free of cuts. The drive gear should be free of nicks, cracks and excessive wear. Rotate distributor drive shaft. It should move freely, without binding.
  1. To install distributor correctly, No. 1 piston (6108) must be at Top Dead Center (TDC) of compression stroke. Remove No. 1 cylinder spark plug (12405) and rotate crankshaft (6303) clockwise until No. 1 piston is on the compression stroke.
  1. With No. 1 piston on compression stroke, align timing pointer with TDC on the crankshaft damper.
  1. Align locating boss on distributor rotor with hole on armature. Fully seat distributor rotor on distributor shaft.
  1. Rotate distributor shaft so blade on distributor rotor is pointing toward mark on distributor base that was previously made in Step 2 of the Removal procedure.
  1. While installing, continue rotating distributor rotor slightly so leading edge of the vane is centered in vane switch stator assembly.
  1. Rotate distributor in engine front cover to align leading edge of vane and vane switch stator assembly. Verify distributor rotor is pointing at No. 1 mark on distributor base. If vane and vane switch stator cannot be aligned by rotating distributor in engine front cover , remove distributor enough to just disengage distributor gear from camshaft gear. Rotate distributor rotor enough to engage distributor gear on another tooth of camshaft gear. Repeat Step 1 if necessary.
  1. Install distributor hold-down clamp and bolt. Tighten bolt, but leave it loose enough to rotate distributor .
  1. Install distributor cap , No. 1 spark plug and ignition wires. Check that ignition wires are securely connected to the distributor cap and spark plugs . Tighten distributor cap hold-down screws to 2.0-2.6 Nm (18-23 lb-in).
  1. Reconnect distributor to engine control sensor wiring .
  1. Set initial engine ignition timing according to procedures found in Section 8A of the Powertrain Control/Emissions Diagnosis Manual.
  1. After engine ignition timing is set, tighten distributor hold-down bolt on to 20-30 Nm (15-22 lb-ft).
  1. Recheck initial engine ignition timing. Adjust if necessary.

Apr 09, 2009 | 1993 Ford Thunderbird

1 Answer

Serpentine belt


The pulley's aren't supposed to spin freely with the belt on. The belt connects all the pully's to the crankshaft, which does not spin freely because it is attached to the pistons inside the engine. To turn the pulleys, you have to turn the crankshaft, which in turn moves the pistons inside the engine up and down.

Feb 15, 2009 | 1996 Jeep Grand Cherokee

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