sludge in sump

[.]

Ever openned a sump to find a large amount of sludge?

 

I'm just wondering if pulling the sump plug out and draining the oil is enough to ensure sludge doesn't build up?

 

If not what can you do during a lube to flush the old oil out?

[RB30X]

Once most has drained out, fill er up (5L?) with dextron III trasnmission/power steering fluid. Trans fluid has detergents in it to break down that stuff and generally clean the insides while the engine is running but will still provide lubrication. After the engine has heated up to operating temp, stop, and let it cool down breifly and drain it out. It will be black as, and no longer red.

[620Z]

Interesting. Hopefully it doen't damage the engine. I guess alternatively you could pull the sump off and clean that inside etc.

[RBZ 260]

not on my cars but ive seen few cars that people bring over to me for servicing.

 

when i service my cars before draining the oil i drop in a bottle of engine flush cleaner. not any one those from repco or supercheap. i ge the stuff from nissan. they not supposed to sell to public. its exy compared to the shop stuff but works well.

 

get chummy with the servicing guy and ask about the engine flush. if nice to him they will sell it.

 

one of my relatives had a S13 silvia with CA18DE motor. did a turbo add on. had the oil drained and sump replaced. it had so much sludge that it was scary.

 

once we put the motor together.ie refited the sump and manifolds got him to buy el cheapo oil closest to the range required. we bought 3 of those engine flush bottles. and 3 filters.

 

ran the engine to normal temp than emptied one bottle in the engine. ran it for 20min.

varying rpm. form idle to holding at 4000rpm and than reving it few times.

 

Drained while hot and replaced the filter. we also lifted the car on one side to help drain as much oil as possible out of the sump.

 

repeated the above procedure with the next filter. (buy the repco filters or any cheap one)

 

the 3rd go we drained the oil after 20min of runing and flushing. and oil was fairly clean . time to put the good filter and quality oil.

 

few weeks later we removed the sump and rocker covers and she had no sludge.

 

from than after we just use one bottle per servicing.

 

been doing this to my S14 for last 9 years. hard driving and everything. had the rocker cover off and to my amasement she was clean as a whislte. no sludge anywhere. not bad for car done 140k km of hard driving. still running perfect.

 

anyone that know sr20 wil tell u the biggest killer of them is blocked oil squirters on cams and cranckshaft. they sound like diesels. lack of servicing.

 

it takes time and its bit expensive initialy, but after that one bottle per servicing is sufficient.

 

i use trany oil sometimes if too slack to get to nissan but wont use it on my performance engines. maybe in a 4L EB falcon or commondoor. u got to be carefull not to overrun the engine otherwise kills bearings and cams. thats what i have been told.

 

 

[xa1973]

 

 

Ditto...

 

I do the same.....have never had any issues,works a treat especially with the V8's