Oil Sludge
Postmaster
Joined: Nov 2011
Posts: 2,553
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Best is to pull the VC's and clean it out with rags/shop vac. Plug the oil return drains first so no chunks drop down. Run for 50-100 miles then change oil again with high detergent oil like diesel engine oil. Change frequently after that (eg every 500 miles) for several changes to finish cleaning.
Sludge can be caused by extended oil changes, incorrect thermostat (180 minimum, 190-195 preferred), PCV inoperative or short trips especially in cold weather.
Sludge can be caused by extended oil changes, incorrect thermostat (180 minimum, 190-195 preferred), PCV inoperative or short trips especially in cold weather.
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Freshman User
Joined: Sep 2015
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Thanks guys. Just bought it.... It had been sitting for 5 years. Trying to get her going
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
Yeah but plug the oil return holes and you'll need to clean up all the big chunks that are dislodged. I think hot runs and frequent filter changes would be a better approach at this point. Change the oil and then just change the filter after 100 miles. Top it off and repeat. Monitor.
Thread Starter
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Freshman User
Joined: Sep 2015
Posts: 38
Likes: 0
Yeah but plug the oil return holes and you'll need to clean up all the big chunks that are dislodged. I think hot runs and frequent filter changes would be a better approach at this point. Change the oil and then just change the filter after 100 miles. Top it off and repeat. Monitor.
Thanks all
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