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Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 20272
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Mitsubishi Pajero: Pajero 2.8 TD 1994. Turbo is OK, huge oil

Resolved Question:

Pajero 2.8 TD 1994. Turbo is OK, huge oil loss ie 20 liters over 2,000 miles, oil in the top breather and intercooler pipes, little white smoke when running....not blue.
Submitted: 4 years ago.
Category: UK Car
Expert:  Matt replied 4 years ago.
Hello

The first thing I'd check is the crankcase pressure relief valve (PCV) these are sprung loaded and are only meant to 'burp' excess pressure every now and then. The exiting gas is piped back to the inlet , however should the valve stick open then the engine tends to suck the air out of the crankcase all the time and this carrys oil over with it.

If you remove the air intake pipe and look inside where the crankcase breather is plumbed in you may find evidence of oil.

If you do find oil replace the valve. If this is all OK then its possible that the valve stem seals are past their best and are drip-feeding oil into the intake. These can be replaced without removing the head by a competent garage in half a day or so

Also check inside the intake just after the turbo for any signs of oil as this would be an indication that the turbo oil seal is starting to fail and a replacement / rebuilt turbo may well be required.

an engine flush may help if you've got a sticking oil scraper ring so its worth a go, as for the oil if you go up a grade / use slightly thicker oil then this is less readily drawn into gaps and less likely to be burnt off
Customer: replied 4 years ago.
Would the problems you list, in fact displace so much oil?
ie 4 liters over 350 miles at an average of 70 mph?
Expert:  Matt replied 4 years ago.
Hello

a blown turbo oil seal will easily shift that much as once the seal is broken the compressor acts like a suction pump and draws it out of the engine

the breather issue and stuck piston ring etc tend not to be so aggressive

might also be worth checking that there's not a leak somewhere
Matt and 2 other UK Car Specialists are ready to help you
Customer: replied 4 years ago.
thanks for that, as i said have taken the turbo out, taken to a specialst, striped down and tested, its ok, no seals blown, so i will check this pressure valve , oil leak and mabey have the valves , guides and stems reconditioned to sort this out. Going to flush the engine and use Amtech restore as compression on 3 bores is around 24 psi and one at 32.
Lawrence
Expert:  Matt replied 4 years ago.
Hello

by all means give the Amtech product a go but I haven't heard of any success stories with it so do be prepared to have to strip the pistons out and - replace rings etc