SECTION 6A1 - ENGINE MECHANICAL - V6 ENGINE

IMPORTANT

Before p erforming any Serv ice Operation or other procedu re described in this Section , refer to Section

00 CAUTIONS AND NOTES for correct workshop practices with regard to safety and/or property

damage.

1. GENERAL I NFORMATI ON

Apart from the changes noted in this Section, the V6 engine carries over from VT Series II vehicles. The information

contained in this Section is to be read in conjunction with previously released Service Information, refer to

Section 6A1 - ENGINE MECHANICAL – V6 ENGINE of the VT Series II Service Information.

SUMMARY OF CHANGES

1. Introduced with VX Series models, the rear

main oil seal carrier housing gasket material

was changed. A non-stick coating has been

added to the beaded side of the gasket (1),

allowing it to move independently from the

cylinder block. Visibly the new gasket can be

identified by a slight pinkish tinge to the beaded

side.

Should replacement be required, both the

revised gasket AND the rear main oil seal

carrier housing (2) MUST be fitted.

The new parts will service back to earlier build

engines but the two parts MUST also be fitted.

Figure 6A1-1

2. Introduced with the release of VX Series m odels ,

the purging location for the PCV valve was

changed by providing a channel in the lower

intake manifold, with the outlet located directly

behind the throttle valve opening. T his pr ovides a

more even distribution of crankcase fumes,

thereby improving spark plug reliability and a

reduction in emissions.

While there is no specific servicing requirement

for the PCV valve, apart from a functionality

check, whenever the upper inlet manifold is

separated from the lower half, then the PCV

valve passage (‘A’ in Fig. 6A1-2) in the lower

inlet m anifold (9) should be cleaned to avoid any

possibility of the passage becoming clogged.

Techline

Legend

1. Upper Inlet Manifold Cover 6. Fuel injector and Rail Assembly 11. PCV Valve

2. Upper inlet Manifold gasket 7. Thermostat Housing & Bleeder 12. PCV Valve O-Ring Seal

3. Upper Inlet Manifold 8. Thermostat 13. Oil Separation Baffle

4. Throttle Body Gasket 9. Lower Inlet Manifold 14. Upper to Lower Inlet Manifold Gasket

5. Throttle Body 10. Spring – PCV Valve

Figure 6E1-2

3. Introduced as a running change to the V6 engine during the production life of VT Series II vehicles, a m odified

throttle body was introduced from engine number VH937404, together with a changed pintle valve in the IAC

Valve. This, together with a hole drilled in the throttle plate, results in better hot/cold climate driveability.