1hz engine issues

[KJShep]

Hey guys new to the forum
I have just bought a 75 series 1hz na cruiser from the auctions. Bought it cause of the excellent condition of the vehicle and also the low kms the engine appears to have( 170xxx). Apparently was involved in an accident where the car rolled onto the driver's side. Can't verify anything else because they don't disclose the original owner which is kinda annoying. Also don't know wether the engine was left running or immediately switched off or what. There's actually not much damage other than a snorkel and a windscreen. Think the tray saved it!! Anyway!! Got it back to my grandad's this arvo. First thing we did was disconnect all the glow plugs so we could tick over the engine with out it starting. Flicked the starter a couple times, and did sound like she was pretty full of oil. Wound it over a bit and a lot of oil came out ( all over the engine bay now). Vehicle is down to about half full of oil now. Plugs back in and fired her up and shut her down a few times. She started but ran real rough for a couple of minutes and very smokey out the exhaust. Let her idle for a good while than revved it up a bit then took it for a drive around the paddock. Also cracked the injectors for air in the lines. Air cleaner is good and clean..... But. Issues we have as of now : Little bit down on power. Under load we have missing. Still smokes on idle. Lots of smoke under load. I should mention that there was oil in the engine bay when we bought it. Also oil up the intake presumably from when it went over. So what does it sound like to you guys? Bent con rod? Buggered valve? I don't reckon its pistons at this stage cause when every injector was cracked open, the engine ran worse. Don't know enough about them. Will do some more diagnosis tomorrow but Any help would be greatly appreciated!!
Cheers
KJ

 

[Deleted member 20448]

KJ, While I"m definitely no expert on diesels it sounds like you've got piston ring problems. If she was upside down you may have gotten oil up into the combustion chambers that explains the smoking on startup. But if that was all it was I'd have thought that the smoking would have gone away after the engine ran for a while. You're continuing to burn oil that has to come from somewhere. Have you noticed any positive pressure at the crankcase vent that might indicate blowby during combustion? I'm guessing you're looking at tearing down the motor in spite of the low mileage. But I'd sure wait for more knowledgeable comments before ripping into it.
Good luck mate

 

[KJShep]

Thanks for the reply mate. Was thinking the same about the smoke. Update this morning. Should have mentioned it before but we have no blowby. Cleaned all intake lines out. Decided to crack all injector lines again. This time nothing really changed on number 1. Guessing an injector or bent rod (not getting to tdc after hydrolock). Any ideas?

 

[Kimbo]

Thanks for the reply mate. Was thinking the same about the smoke. Update this morning. Should have mentioned it before but we have no blowby. Cleaned all intake lines out. Decided to crack all injector lines again. This time nothing really changed on number 1. Guessing an injector or bent rod (not getting to tdc after hydrolock). Any ideas?[/QUOTE
Hey mate. Sounds odd for a 1HZ. Very difficult to tell just from a description unfortunately. The best idea of course is to take it to a diesel specialist, who after observing it in the flesh can tell whats what. Diesel engines don't come much more simple than a 1HZ. Is it engine oil in the engine bay? What colour is the smoke she's blowing? Also, when you say you disconnected the glow plugs, do you mean you simply cut off power to the buzz bar? Sounds a bit odd... if the glow plugs weren't heating and you started the combustion process theres gonna be a lot of smoke for a while.

 

[KJShep]

Hey mate
We actually took all the plugs out to wind it over a bit and get all the oil out. The colour of the smoke is blue going in grey, suggesting unburnt diesel. I've bought the car interstate and was planning on driving it home but will get it shipped to me now instead. I did speak to my local diesel guru and he thinks it a bent rod, or possibly an injector. Something wrong with cylinder number 1 so will wait to get it home and inspect more quick is gonna be 2 weeks. Will report back with what I find. Cheers for the help guys