Wednesday, January 18, 2012 - 01:58 pm, by: Ryan Pollard(Gztwenty)
Ok, so bought my JZZ30 last week. Tiny bits here and there need attention. Noticed it had an oil leak so investigated to the cam cover seals. Easy! Got new seals from Toyota Adelaide ($74). Right, geared up ready for the small job at hand and once I yanked the cam covers off, this is what I was presented with:
Wednesday, January 18, 2012 - 02:54 pm, by: Aaron Casey(Blownminiturbo)
Nah more like has been long time between oil changes.. Sludge build up. If was headgasket would have white/cream sludge. Scrape off what you can try run an oil flush through it and do a few quick oil changes try get the •••• out
Wednesday, January 18, 2012 - 03:55 pm, by: Shane Haverkamp(Havabeer)
maybe they just packed the cam covers full of grease rather then worrying about letting the oil do its job.
might be an idea to rip the sump off and make sure the other bearings aren't caked with •••• and your oil pick strainer isn't blocked and full of •••••
Wednesday, January 18, 2012 - 05:22 pm, by: Christian Perez(Chrisperez)
Ryan, I pulled my cam cover off few weeks back to change the rubber gasket and I was surprised with the same thing.
Black sludge just like yours. Once I was over the shock I continued to start scraping off all that crap. My next door number must of thought I was nuts because i pulled out the vacuum and sucked all that hard sludge whilst scraping at it.
Worked well, this is a result of bad oil being used, and the bloke I bought my soarer of was an absolute tool. Had an oil leak on the turbo return so he was pouring in cheap oil instead of fixing the leak.
Thursday, January 19, 2012 - 06:09 am, by: Matthew Sharpe(Madmatt)
My sister in laws Mitsi is like this. I showed it to her a couple of months ago, but she hasn't done anything about it yet.
I suspect as well as a couple of good flushes, it would probably be a very good idea to drop the sump and clean it out as well as the oil pick up filter.
Thursday, January 19, 2012 - 07:54 am, by: Ryan Pollard(Gztwenty)
From memory though you need to lift and/or take the engine out to get the sump off? I'll have a better look after work today. I did get the car cheap, but still, this is atrocious. I'm more annoyed that someone could be so neglectful to an engine, especially a 1JZ!
Thursday, January 19, 2012 - 11:35 am, by: Jeff Bedsor(Jeff_bedsor)
Don't worry too much about it, mine was like that as well(5 years ago) and it's still going strong with 30psi of boost. I took the cams out and hit it with degrease and kero then changed the oil a couple of times with cheap stuff. It's amazing how much abuse these engine will take.
Thursday, January 19, 2012 - 06:19 pm, by: James Wilson(Ser493)
Been in exaxtly this position, did a full rebuild and never looked back, having said that, most of the build up was up high and I could have just cleaned it up.
Friday, January 20, 2012 - 06:15 am, by: Matthew Sharpe(Madmatt)
Ryan Pollard wrote on Thursday, January 19, 2012 - 07:54 am:
From memory though you need to lift and/or take the engine out to get the sump off?
Not sure - could be a crossmember in the way.
Always a good idea when buying a car to get a pipe cleaner and poke around under the oil cap and see what you can pull out. Tells a lot about a car. Often just shoving a finger in and feeling around is enough.
You might get away with just undoing the engine mounts and lifting the engine a bit. Managed to replace a full set of big end shells by doing this once on a car I got dirt cheap due to bad big end knock - was a pretty quick, cheap and easy job and the car went like a dream for years afterwards.
Saturday, January 21, 2012 - 03:22 pm, by: Ryan Pollard(Gztwenty)
Yeah Dad decided to tackle the cam covers, cos they were just as bad, if not worse. Even pulled out and cleaned the baffles. I've been ever-so-slowly dragging the gunk out with a screwdriver. Going to clear out what I can then flush it all down with some degreaser and apparently diesel does a good job. Then keep flushing, then flush with oil. Then after I'm satisfied, I'll run good oil and kick her over. Then probably do a change not too long after.
I used to run Penrite HPR10 (10W50) in my 1JZ that had 60,000kms. What would you suggest running in this engine? Has nearly 200,000kms.
Saturday, January 21, 2012 - 03:56 pm, by: James Wilson(Ser493)
Yep HPR 10 is good stuff thats what I use.
Another thing I did which worked well on another engine was I drained the oil and filled the entire engine - (about 9-10lts from memory) with kerosine and left it overnight, that cleaned it up pretty good lol. I'm sure diesel would work well too. You have to be super careful none of the massive chunks block the oil drain tho :/
I don't really think filling the engine for longer periods is a good idea tho, I reckon plastic seals might start melting or corroding??
Saturday, January 21, 2012 - 11:48 pm, by: Robert Day(Lexsmaz)
As has been mentioned Flushing agents can work to break up the sludge etc, A mate did it to a customers car once, but it ended up down the track blocking the oil strainer pick up in the sump, with obviously bad results ..
I have looked at a few 1JZ motors over the years & the first thing i do is take off the oil filler cap & have a good look inside with a torch, its not hard to spot sludge build up like that, if you look for it ..
Monday, January 23, 2012 - 02:28 pm, by: Ryan Pollard(Gztwenty)
Just bought two bottles of the new fully synthetic Penrite HPR10 (10W50). And also heard, and saw good reviews on the LiquiMoly Engine Detox. Got a bottle of that and I'll try that soon too.
This is how it looks after hours of using a small screwdriver and a vacuum cleaner (Thanks Christian).
Monday, January 23, 2012 - 06:53 pm, by: Ryan Pollard(Gztwenty)
Yeah, I wasn't too sure, but seen and heard good things about it. I'll run it once, then do some frequent oil changes and keep checking the cams. Will drop the sump hopefully and see how that goes too, just to make sure it stays clean.
Monday, January 23, 2012 - 09:33 pm, by: Allan Langford(Allan)
you can get the same effect by running a high detergent diesel engine oil, used to do it all the time on my 7m-gte with no ill effects as most "performance" toyota engines run a 5000km service interval anyway, just a nice clean motor and the oil is fairly black the first few changes
Tuesday, January 24, 2012 - 07:45 pm, by: Ryan Pollard(Gztwenty)
Right, all done, back together, and oil has been flushed with LiquiMoly, drained, and refilled. Looked at the sump and noticed it cant be pulled off while the engine is still mounted. But will run it for a little while, maybe run another flush through it, and do a few more changes, see how she goes. Also knocked up a 4" intake pipe
Wednesday, January 25, 2012 - 06:05 am, by: Matthew Sharpe(Madmatt)
Yes, I agree with Allan, I've used diesel engine oil as a cleaning oil before too - left it in for 100km before changing it and the filter out. Worked really well - mind you this was on a British Leyland engine, so low tolerances compared to a Toyota - and no turbo to consider.
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