Major Service: Difference between revisions
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# Move to the next cam sprocket and repeat steps 1-4 | # Move to the next cam sprocket and repeat steps 1-4 | ||
This is the Mitsubishi recommended method in the service manual.[[File:Bulldog clip on timing belt.png|left|thumb]] | This is the Mitsubishi recommended method in the service manual.[[File:Bulldog clip on timing belt.png|thumb|none]]'''Cam gear locks can also be used, but are not necessary.''' See example below.[[File:Cam gear locks.png|left|thumb|Example of generic cheap cam gear locks]] | ||
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[[Category:Guides]] | [[Category:Guides]] | ||
[[Category:Maintenance]] | [[Category:Maintenance]] |
Revision as of 11:33, 18 May 2022
Overview of the VR-4 Major Service
The major service on the VR-4 is considered to be the biggest and most complex service with the following details:
Frequency | Core Tasks | Optional Tasks |
---|---|---|
Every 100,000km | Replace Timing Belt
Replace crankshaft oil seal Replace Water Pump Replace Coolant Replace Timing Belt Tensioner Replace Timing Belt Tensioner Pulley |
Replace camshaft oil seals
Replace harmonic balancer Replace alternator belt Replace AC/Power steering belt Bleed Brakes Replace Transmission/ATF fluid Bleed Clutch Replace Transfer Case fluid |
Required Tools
The tools you will need for the major service will depend on whether you are performing just the core service or all of the optional tasks. We list the tools here for each, plus alternative tools (where possible) if you do not have the recommended tool.
Tools for Core Tasks
Tool | Purpose | Alternatives | Notes and examples |
---|---|---|---|
1/2" socket set | Removal of various bolts | Spanners (if you're a mad lad). | Socket set will need to include 10mm through 17mm, and 19mm through 21mm. Many of the |
3/8" socket set | Removal of various bolts in the harder to reach places | Spanners or trying to do it all with a 1/2" socket set | Used to access tighter areas. |
Open and ring spanner set | Removal of bolts and nuts that cannot be reached with sockets, or holding nuts on the other end of bolts you are removing with the socket set. | ||
Camshaft sprocket holder | Inserting into the two guide holes to hold the crankshaft pulley (harmonic balanacer) while you remove the bolt. | Breaker bar inserted into harmonic balancer bolt head, followed by tickling the starter motor | Whilst this is a cam sprocket holder, the 6A13 harmonic balancer has two guide holes that allow use of this type of tool. The Mitusbishi service manual specifically mentions tool MB990767 and the right size pins (MD998715) for holding the pulley. |
Very powerful 1/2" impact gun | Removal of harmonic balancer bolt | Breaker bar | If restraining the harmonic balancer using a cam sprocket holder, the impact gun needs at least 1,500Nm of nut busting torque. If you do not have such a tool, you can try a breaker bar. |
Small 10mm open ended spanner | Removal of the timing cover bolt behind the Power steering pump bracket | Removal of the power steering pump bracket before accessing this bolt. | Seriously, this one bolt will make you rage. |
Timing belt tensioner wrench (socket) | Tensioning and holding the timing belt in position so you can then tighten the tensioner pulley cam. | A screwdriver and feel. | Mitsubishi list this tool as part code MD998767 but these can be purchased from eBay by searching for terms like "Mitsubishi Belt Tension Tensioner Adjuster Pin Wrench Timing Tool".
If you don't have access to this tool, you don't need the beam style torque wrench either. In that case you tension the belt by levering the tension of the pulley using a screwdriver braced against the alternator bracket. This is an inaccurate method but likely to result in an over-tight rather than loose belt given the low torque (3Nm) required to tension the belt. |
Beam style torque wrench with range of 0-9Nm (must be able to measure 3Nm) | For use with the timing belt tensioner wrench | A regular style of torque wrench can be made to work but needs to go down to under 3Nm | If you don't have access to a torque wrench, use the screwdriver method as above. |
Oil seal removal tool | For removing the crankshaft oil seal | Small drill bit and self tapping wood screw | If you do not have an oil seal removal tool (search eBay for the term "Shaft Type Seal Puller"), you can carefully drill a small hole in the oil seal, screw a self-tapping screw into that hole and then pull on the screw with pliers.
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Gear locks | Locking the camshafts in TDC position while you replace the belt. | Bulldog clips to hold the timing belt onto the cam sprockets. | When replacing the timing belt, you can either use cam locks to hold the cams into position for the entire duration of the work, or you can just:
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