Dismantling of Fuel Pump for Isuzu 4JJ1 Euro 4n Series Engine

 This article mainly introduces the disassembly of the Isuzu engine oil pump

Isuzu E-IDSS Diagnostic Service[ 03.2021]

Legend
1.Fuel feed pipe
2.Injection pipe sleeve nut
3.Space rubberA
4.Supply pump bracket
5.Space rubber B10.Supply pump gear
6.Supply pump
7.Lower timing chain cover
8.Nut
9.Sprocket


Including the inside of the injector, the holes and gaps that are the fuel paths for the fuel system have anextremely precise finish. Therefore, because there is the possibility of damage if foreign material becomes mixed in, cover the cap after removing parts, etc. to prevent the entry of foreign material.
Removal
1. Extract the coolant.
2. Remove the air intake duct and hose.
· Remove the boost sensor connector(1) and harness clip, and then remove the air intake duct together with the hose.

3. Remove the engine cover.
· Remove the PCV hose from the air cleaner outlet duct.
· Remove the oil fler cap, and remove the engine cover.

4. Remove the A/C compressor drive belt.
5. Disconnect the radiator upper hose.
6. Remove the air duct(air cleaner-turbocharger air duct).
7. Remove the left side noise cover.
. Disconnect the harness connector of the dropping register, and remove the noise cover.
8. Remove the A/C compressor.
· Remove the harness connector from the A/C compressor.
· Remove the compressor from the A/C compressor bracket. Fasten to any suitable position with a wire along with the hoses.
9. Remove the A/C compressor bracket.

NOTE:
Do not reuse the fuel feed pipe
14. Remove the fuel hose(1).
· Keep the disconnected fuel hose in clean, so that should not adhere.

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NOTE: Do not reuse the injection pipe
16.Remove the common rall and the common rail bracket.
NOTE:
·Hold the common rail unit not the pressure limiter or pressure sensor.
·Be careful not to damage the pressure sensor connector.

18.Remove the cylinder head cover.
.Remove the vacuum sensor bracket and the EVRV bracket from the cylinder head cover.
NOTE: Do not damage the lip section of the oil seal with the connector of the injector.

Legend
1. Upper timing chain cover2. Lower timing chain cover
22. Rotate the crankshaft in the forward direction to align the first cylinder piston to the compression top dead center.
· Check the TDC alignment position using a mirror, etc.

Legend
1. Crankshaft damper pulley
2. Mirror
3. TDC
23. Confirm that the camshaft bearing cap is aligned with the alignment position of the camshaft(1).

Legend
1.Oil feed pipe
2.Timing chain tensioner
3.Gasket
26.Remove the timing chain tension lever pivot.

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32. Remove the space rubber together with the supply pump and supply pump bracket.
NOTE:
· Do not hold the high pressure pipe (1) of the pump instead of the handle when removing the supply pump.