Engine Shot...

Quote:

---

Originally Posted by disco2_dan

I'm so impressed by every ones willingness to help, this to me shows the true Aussie spirit, I wish I was closer so I could lend a hand too, really hope everything works out for ya mate, and to every one lending a hand or trying to you should be very proud of your selves for being such good people!

---

Couldn't agree more mate. Camped in the rooftop tent outside strangy's house right now, after using his tools and his help this evening. Hope I get the opportunity to return the favour to someone someday.

Well it's been a busy and productive evening. Got back to the Defender once it cooled off a bit, and was beginning to think that Blknight's guess was the right one, that the timing had slipped, but it didn't fit everything that was going on, so lifted out the pistons. All bar one piston had the rings baked tight into them, and the oil seal was shot on #4 piston, which explains the blowback through the oil. I'm guessing that the piston with the failed seal and baked rings was the one that was knocking.

Other than that there doesn't seem to be any other issues - big end bearings are good, the bore is fine, pistons are unmarked, and the rings haven't lost their spring, they're just coked tight in place. A lot of soaking and cleaning in thinners, new oil ring, and reassembly, and they are good to go. Last job done was to drop the piston assemblies back in, and it feels noticeably snugger in the cylinder, as I would expect them to be. Too dark to do anything more tonight, but need to torque everything up in the big end tomorrow, need to get to Sutton motors and get a new head gasket, and reassemble. We'll see what the outcome is then.

Question though - would a blown turbo (which was the initial problem or so I thought) burn oil so much that once it made its way back into the engine, it would coke up the pistons like that????

Quote:

---

Question though - would a blown turbo (which was the initial problem or so I thought) burn oil so much that once it made its way back into the engine, it would coke up the pistons like that????

---

Have a look inside the input of the intercooler, if it is really wet with oil then the there are only two places that the oil can come from.

If the turbo's bearing seals are crook, then IMHO the engine would have got a large dose of oil all of a sudden and could have run away, feeding on it's sump oil.
I'd test your turbo by giving the end of the shaft a gentle wiggle with your fingers, there could be a very slight or no movement side to side across the bearing's, but there should be definitely no end float fore and aft at all.

A link to a good turbo check.
http://www.theturboforums.com/conten...charging-guide

Most likely culprit is oil mist from the engine breather and given that you have found a crook oil ring and the others stuck, that would be the source of the sump pressurising and oil making it's way into the air input.

For all this to happen what is the history of that engine?

I would question the choice of oil type, if a cheap oil that is meant for petrol motors has been used and/or non regular oil changes with filter, means that combustion products can stay inside the engine building up as sludge and not get dumped out at the oil change interval. Make sure that it's detergent oil that's meant for diesel and change between every 7,000 to 10,000 kilometres.

I change the oil ( Castrol RX Super ) and filter in my 300TDi's at every 5,000 kilometres as they do a lot of short runs and the inside of my engines are spotless with no sludge at all, the kilometres on 'Daisy' is now at 530,000 and is running as good as .
.

Quote:

---

Originally Posted by wrinklearthur

For all this to happen what is the history of that engine?

I would question the choice of oil type, if a cheap oil that is meant for petrol motors has been used and/or non regular oil changes with filter, means that combustion products can stay inside the engine building up as sludge and not get dumped out at the oil change interval. Make sure that it's detergent oil that's meant for diesel and change between every 7,000 to 10,000 kilometres.
.

---

The history of the engine is a good one, that's why I was asking. Changed the rings and the head gasket on the engine a couple of years ago as a matter of course - had to lift the head anyways due to a broken glow plug tip, and gave the engine a once over while I was at it. She gets driven daily obviously, seeing as I"m touring Australia in it, and gets an oil change and basic service every 5000 to 7000 km because I can't afford for her to break down on me, and I don't cheap out on the fluids - always believed that good oil is cheap insurance against engine failure.

Fingers crossed that you've found the culprit(s). Hopefully you'll be back online shortly with boundless happiness :D

yep fingers crossed, Mike is out now trying to get a head gasket. Sutton motors have closed for the holidays till 7th Jan!
Giving the 'emergency" number a try.

Failing that if anyone in Adelaide has one, or is prepared to go to TRS in short notice and drop it to the RFDS at Adelaide airport.........

Quote:

---

Originally Posted by strangy

yep fingers crossed, Mike is out now trying to get a head gasket. Sutton motors have closed for the holidays till 7th Jan!
Giving the 'emergency" number a try.

Failing that if anyone in Adelaide has one, or is prepared to go to TRS in short notice and drop it to the RFDS at Adelaide airport.........

---

I'm a little further away, but I do have some three hole head gaskets here if you really get stuck.
.

Quote:

---

Originally Posted by mike_ie

The history of the engine is a good one, that's why I was asking. Changed the rings and the head gasket on the engine a couple of years ago as a matter of course - had to lift the head anyways due to a broken glow plug tip, and gave the engine a once over while I was at it.

---

Do you think the rings seated properly after that overhaul ?
Doing that overhaul, the bore should have had at that time, a light hone to break the glaze and then use some running in oil for say 200 kilometres.

Quote:

---

She gets driven daily obviously, seeing as I"m touring Australia in it, and gets an oil change and basic service every 5000 to 7000 km because I can't afford for her to break down on me, and I don't cheap out on the fluids - always believed that good oil is cheap insurance against engine failure.

---

That only leaves the conditions that the oil is operating under.
What is the operating temperature of the engine, has the thermostat been checked lately and is it a 88° C type ?
When checking the thermostat make sure that it closes tight as it cools and you can't see light pass the seal of the valve, as that will cause the engine to be slower getting up to it's operating temperature.
.

Quote:

---

Originally Posted by strangy

yep fingers crossed, Mike is out now trying to get a head gasket. Sutton motors have closed for the holidays till 7th Jan!
Giving the 'emergency" number a try.

Failing that if anyone in Adelaide has one, or is prepared to go to TRS in short notice and drop it to the RFDS at Adelaide airport.........

---

Yep, nothing happening here. Suttons used their last head gasket a few days ago, won't be reopening till the 7th. All other garages, repco, supercheap are tapped out. Bit of a hail mary, this, but anyone in the Adelaide are that has one and would be willing to drop it off at the RFDS in the next couple of hours???

Failing that, how far would I get reusing the old gasket. I know that obvious answer is "no, don't do that!!", but in the given situation?? I'm assuming that it will have compressed too much, yes?

Quote:

---

Originally Posted by wrinklearthur

I'm a little further away, but I do have some three hole head gaskets here if you really get stuck.
.

---

---- Bounce ----

Quote:

---

Failing that, how far would I get reusing the old gasket. I know that obvious answer is "no, don't do that!!", but in the given situation?? I'm assuming that it will have compressed too much, yes?

---

That would be a lot worse than using a cheapie and would most likely damaged the head.
.

Say Mike
Can you clear out some of your old messages from your mail box? it's saying that it is full and I can't send to you.

Arthur