Join Date: Mar 2011
2007 Sante Fe SX 2.2 CRDi
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At those sort of Kilometres blow by from the Turbo is not uncommon...
There are a few things you can do to keep the turbo ticking over even with some leaking seals... Lots of Landcruisers, Nissan Patrols also have some turbo seal leaks at high mileage.
Fitting an oil catch can to the inter cooler can catch some of the excess oil... If the car isn't consuming much oil at each service interval it isnt necessary to replace, It's just worn...
You can also go up a grade of oil in the process. Something a little thicker to account for the wear. I had recently changed to a 10w/40 from a 10w/30.. The motor was a little quieter and there was less consumption of oil between changes... (My turbo still failed eventually though).
Given the motor is a little older, reduce oil change times. Plan changes a little earlier than normal scheduling to keep the oil cleaner. This will buy time for the turbo bearings. Given the turbo in the Sante Fe is wet type (oil cooled and lubricated) the oil lubricates the shaft bearings ever so slightly (the bearings roll on microns of oil) and the cleaner the oil, the longer they last. (From an inspection recently the bearings in my original Turbo appear to be brass/alloy, high temp resistant and long wearing as long as they are lubricated... Cleaner oil means less contaminants, the longer you leave oil services the higher the possibility of gumming, sludge building over time.
Any obstruction to the oil lines to and from the turbo will see it starve/overheat and fail..
If you inspect your intercooler and find light oil, or even enough to cover the tip of your finger at the opening, don't be overly alarmed. Only issue with oil like this is it gets sucked through the induction and burnt... This can impact the EGR valve causing poor running, starting, and sluggish driving... Fit an oil catch can to you intercooler and keep and eye on the catch can every few weeks, draining it and topping up the engine oil level if required. Hot engines produce oil mist which rises and is ventilated, any oil leak from the turbo will also misted when hot and once cooled it settles, pooling at openings and galleries of your intercooler... It looks like more than it is!
Regarding turbo cartridge replacement, the real issue is balancing. The turbo cartridge needs to be balanced and refitted correctly in order to function. The variable nozzles aren't user serviceable... Having taken some pics of the mechanism, it requires assembly at a factory or reconditioned for proper function. It can be done, but I don't think it's cost effective over buying a replacement turbo, an unbalanced cartridge can self destruct, causing much more damage than the cartridge cost.
A replacement turbo I recently purchased came with full factory diagnostics, balance sheet and QC check. Balancing is important for something spinning over 150,000 or more rpm's
Last edited by sed8ed; 07-28-2015 at 12:24 AM.
Reason: Added turbo cartridge info