Symptoms
Oil weeping down the back of the engine, oily smell in the cab and a damp underside. The factory rubber half-moon seal at the back of the head shrinks and hardens.
The fix, step by step
- Lift the seats and engine cover.
- One owner says you don't need to remove the fan shroud or timing cover: undo the two 12 mm bolts, three hoses and two plugs, then roll the cover off over the valve gear.
- Clean both surfaces thoroughly.
- Delica.ca's Growlerbearnz fits the alloy half-moon seal (Mitsubishi MD372348) with grey high-strength silicone, and says red or black silicone is too soft.
- Don't put silicone between the cover and its gasket.
Tools & part numbers
- 10 and 12 mm sockets
- degreaser and scraper
- small mirror
- grey RTV silicone.
Where to buy the parts
Fel-Pro VS50100R valve cover gasket with half-moon seal (as used by a Delica.ca member)RockAuto ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Mitsubishi Delica Star Wagon (L300 4WD) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.