Engine Flush

Submitted: Sunday, Jul 19, 2015 at 18:42
ThreadID: 119539 Views:1660 Replies:7 FollowUps:2
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Hey guys,

I'm looking at doing a engine flush on my 91 cruiser and was wondering if anybody had some recommendations on flushing agents, thanks
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Reply By: Ross M - Sunday, Jul 19, 2015 at 19:24

Sunday, Jul 19, 2015 at 19:24
Is it a Petrol or Diesel, either way if it has been run on a good quality oil and changed at suitable intervals, the inside of the engine should be clean.
Unless it has been abused ie, had 50,000km interval oil changes or been run on crap quality oil, it will never need a flush in it's life.

For example, Mobil Delvac is a detergent oil and it carries the contaminants within the oil. It cleans the innards and there will be no buildup to flush out as it is removed at each and every oil change. That is what good oils do.
AnswerID: 557172

Follow Up By: 4x4Newb - Sunday, Jul 19, 2015 at 19:31

Sunday, Jul 19, 2015 at 19:31
its a diesel and the guy i got it off said he didn't use it that frequently once a month at most so the oils just been sitting mainly
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FollowupID: 843480

Reply By: Member - Bigred13 - Sunday, Jul 19, 2015 at 19:28

Sunday, Jul 19, 2015 at 19:28
Hi 4x4 Newb,Unless your oil is extremely dirty ,or signs. of water just change oil and filter,most modern oils are clean looking even after 5-10000 is ,so a flush is not usually warrented ,did you join Lcool on line yet ??,they will advise
AnswerID: 557173

Follow Up By: 4x4Newb - Sunday, Jul 19, 2015 at 19:33

Sunday, Jul 19, 2015 at 19:33
the vehicles been sitting for a while

im having a bit of trouble joining Lcool
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FollowupID: 843481

Reply By: Member - Bigred13 - Sunday, Jul 19, 2015 at 19:40

Sunday, Jul 19, 2015 at 19:40
Hi 4x4 Newb ,If it has not been started for a while ,I would drain and change filter after a couple hundred k's ,then should be ok. Yes agree joining Lcool is a bit slow but make sure all the details are done correctly and it is well worth it
AnswerID: 557175

Reply By: disco driver - Sunday, Jul 19, 2015 at 20:07

Sunday, Jul 19, 2015 at 20:07
The days of regular engine flushes is almost a thing of the past Modern oils are very effective in keeping the internals clean and eliminates the need for flushing out.

It is not unusual for an engine to suddenly use much more oil after an engine flush, particularly if you use one of the most effective types.
The flushing fluid/oil removes all the carbon residues from everywhere, which is not necessarily a good thing.

As others have said, give the motor an oil change when hot, change the filter and replace the oil with a recognised brand.

If you really want to see how mucky your motor is, Take the Valve cover/rocker cover off and look inside and then when all the oil has drained out poke a finger into the drain hole and run your finger around inside. this should indicate how much sludge is in the bottom of the sump.
Make your decision based in what you find as a result.

Disco.
AnswerID: 557176

Reply By: Whirlwinder - Sunday, Jul 19, 2015 at 22:32

Sunday, Jul 19, 2015 at 22:32
If you decide to use a flushing agent then I used CEM flushing additive in my 1997 80 series 1HZ engine each oil change for about 150000 Ks. I sold it at nearly 300000 ks and it was still running with minimal oil use.
Others have their opinions about flushing but I can tell you that if you drain the oil and fit new filter and new oil, by the time you start the engine and check for leaks the oil WILL be black. Use the CEM product and the oil stays cleanish for about 1500 ks.
It is about $120 for a 250ml bottle but does about 5-6 oil changes.
If you use it please post your results.
Just a customer who is happy.......no connection etc....
Ian
AnswerID: 557179

Reply By: Batt's - Monday, Jul 20, 2015 at 21:44

Monday, Jul 20, 2015 at 21:44
I also have used CEM engine flush on my 93 diesel GQ patrol a couple of yrs ago I would recommend it and just follow the instructions. When I read on their site how much extra gunk you might get out of the motor from flushing it with their product I only put 9 Lts of oil in and used a new oil filter instead of the recommended 10.2 Lts for my motor. After finishing the treatment I dropped the oil and got 11 Lts out so it did loosen up and clean out the old sludge it's worth a go.
AnswerID: 557216

Reply By: Member - Peter G20 - Tuesday, Jul 21, 2015 at 12:31

Tuesday, Jul 21, 2015 at 12:31
Hi I recently pulled the sump off my 98 GU Patrol 2.8 turbo and the inside of the engine was amazingly clean! It looked brand new!! Not bad after nearly 400K !
I have always changed the engine oil every 5 K.
Never done an engine flush!!
AnswerID: 557232

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