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Post by Bruce on Jun 18, 2004 17:33:14 GMT 11
My MU has developed a oil leak around /under the turbo, noticed oil on the diff the other day could not see where it was comming from so washed it down and kept an eye on it for a few days, no problem untill today when we went on a 100 k run and the oil was back (black sump oil). So it is not leaking when Iam driving around town, have washed her down again, reved her up and nothing. Though it was comming from a hose under the turbo, took the hose off to have a look and out come radiator water, so now know that the turbo is water cooled. Am wandering if it is a seal in the turbo and only leaking when under boost or something.
Hope I can sort it as we are going on a big trip next Saturday (maybe)
Any help/ ideas wil be much appreciated, I like to know whats going on before taking her to a mechanic as they get worked up about working on imports here.
Cheers Bruce.
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Post by geeves on Jun 18, 2004 18:20:55 GMT 11
3 easy possibilitys then several hard ones.
1 oil lines to the turbo or the return
2 oil lines and return to the vacume pump on the back of the alternator. Only likly if you do a lot of mud wading.
3 loose oil filter Most likly but you would of checked this while playing with the oil cooler feeds.
Check the oil filter first as Isuzus are known to loosen the filter in use unless its the genuine expensive isuzu one.
next could be seepage from the head or tappet cover gasket, leakage from the pcv vale at the back of the engine or maybe you just splilt some oil at last top up.
good luck
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Post by justin on Jun 18, 2004 18:21:27 GMT 11
The IHI Turbo has a coolant inlet/outlet & an oil inlet/outlet. The oil inlet is on the top, (http://www.ihi-turbo.com/turbo_RHE-RHF.htm), and the outlet is directly beneath. It is a rigid pipe with an elliptical flange at the top. This is bolted to the turbo's oil outlet port by two small bolts, sealed by a gasket. If you cannot see any oil from the top hose then it is more than likely the bottom port, either loose bolts or the gasket is perished. You can access the two bolts with a small socket, (I think 10mm from memory), on an extension bar from the front driver side-wheel arch. You may also be able to tweak up the outside bolt, (furthest from the motor), from the top. They can loosen through vibration but if it is the gasket prepare yourself for a long fiddly afternoon, or ask the Mechy to replace it. J
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Post by Bruce on Jun 18, 2004 19:04:32 GMT 11
Thanks for the quick reply guys, will hop under tomorrow morning and check out all you've told me. let you's know how I go.
Cheers Bruce
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Post by Harry on Jun 18, 2004 20:30:11 GMT 11
Also,check oil isn't coming from breather thru air intake.My replacement uses 3l/100km and the turbo body gets covered in oil when the motor has been worked hard.The air end of the turbo was slightly damaged in transit and I think it may be distorted.But judging by the amount of crankcase pressure the oil is definitely coming from the breather.
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Post by James W on Jun 18, 2004 23:26:04 GMT 11
I had a simular souding problem. I thought the turbo had gone, but it was the breather wasting oil into the inlet of turbo and generally making a mess as harry is also suggesting. I was fine around town but at 100km/h with turbo boost it showed up again.
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Post by Bruce on Jun 19, 2004 8:11:29 GMT 11
James, how is this problem solved? I took the air intake off the turbo yesterday and there was some oil in the turbo, will go and have another look now.
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Post by Bruce on Jun 19, 2004 9:25:30 GMT 11
Got me stumped now, after reading the last two posts I though what have I done before this started, I put the snorkel on, now that should not do anything but improve things but I also put one of those top filters in the snorkel. So I just took it out and went for a drive for about 30k at 100 to 120 k's and now not a drop of oil, surly that could not be the problem, this things are sent to try me. So has anyone else put one of these filters in the top of their snorkel?
Cheers Bruce
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Post by geeves on Jun 19, 2004 14:39:28 GMT 11
A possibility is that you dislodged the breather hoses while playing with the snorkle Mr Isuzu didnt do a good job of making these things diy friendly.
good luck
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Post by Bruce on Jun 19, 2004 15:43:05 GMT 11
Hi Greeves, hoping you mean those mongrel little about 1/8 hoses running all over the place because there was one off, near the brake master cyc and it goes down in under the turbo some where. I actually put it back on yesterday when looking to see where the oil was coming from, and as it hasn't happened today gives me some hope. Will keep my fingers crossed and go for a good run tomorrow.
Cheers Bruce
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Post by geeves on Jun 20, 2004 8:13:14 GMT 11
If thats the hose I think your describing it is the vacume feed for the brake booster If thats disconected your brakes almost dont work The other end of it is on the back of the alternator
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Post by Bruce on Jun 20, 2004 8:17:04 GMT 11
Hi Geeves want to try the chat room. Bruce
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Post by Bruce on Jun 20, 2004 13:26:33 GMT 11
Found the "bloody" leak,went for another run this morning got home and nothing checked again about 2 hours later and there was oil. So was able to stace it to the inlet side of the turbo, there is about 5 small bolts holding the case on and half were loose. Will talk to the turbo people tomorrow who I got this turbo from about 18 months ago and make sure that all I have to do is tighten the bolts. I think this is the case that you need to turn if you are putting a intercooler on. Thanks for everyone's help.
Cheers Bruce
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Post by geeves on Jun 20, 2004 18:31:34 GMT 11
Good luck with the repair
I couldnt get into the chat this am as I had to go out
Alan
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Post by Bruce on Jun 23, 2004 7:43:41 GMT 11
Still not 100% sure I have this sorted yet. There now is a turbo place in Rockhampton Qld, MTQ Turbo's really helpfull people, so ok worst sitution new turbo as the seals are stuffed in the old one which is only 18 months old. They said it is built from 2 or 3 different turbos. But what they told me to do was to put this filter on the by pass hose between the rocker cover and the air in take to get reed of an oil that might be comming from the motor(blow by) helps for cleaner air to turbo, this is also to make sure I don't have a big problem with the motor.
They think that with the two oil bath air filters it may have made to much of a restriction there for making the turbo suck out of the rocker cover. Took out the top filter, put on the other filter and the turbo has stopped leaking going out for another running when I finish this.
The new turbo price $1290 Aus list hope this all makes sense.
Cheers Bruce
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Post by justin on Jun 23, 2004 8:39:39 GMT 11
That Turbo price is round about the same as I was quoted in Oz, but if your present one is a collaborative effort them this would mean it is repairable. And if as you say it is oil from the rocker cover due to increased frictional loss on the air intake then surely a lower density filter on the snorkel and a new gasket on the front impeller housing will fix the problem? J
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Post by Bruce on Jun 23, 2004 16:26:40 GMT 11
Hi Justin, yes the turbo I have should be repairable and to do so they replace the canister,they call it, it cost about $900 plus fitting $150. They did not say anything about front gasket, would have to check with them. I was also told that normal paper filters are the go with turbos as well.
Anyway went for a 60k drive at 100ks and no leak, there is a little bit of oil now collecting in the filter, not much but it will now not be going through the turbo and into the intake manifold, this system may be go if you have a intercoller on, might stop it getting full of oil, only a though Iam no Engineeer or Diesel Fitter just an old charter boat skipper now wanting to stay on the land a bit more.
Cheers Bruce
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Post by justin on Jun 23, 2004 18:20:02 GMT 11
Mmm the canister? I wonder which part of the unit below is the canister:  And $900 bucks sounds like a lot. You have the combustion chamber at the back and the impeller housing at the front, which if it were leaking as described would be through the seal to main body of the unit, unless it were cracked. Love to hear the result to this one. J |
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Post by Bruce on Jul 15, 2004 14:53:52 GMT 11
Justin sorry it's taken so long to get back to you but we've been travelling for a couple of weeks.
Anyway canister is probably not the right word, but the end result, very little oil leaking from the housing now, I would say it is because of the filter I put inline from rocket cover and air intake just before the turbo. There is a bit of oil in the filter (collector may be a better word) probably half a cup, have not had to add any oil in 3000 k's. The turbo you show here is not the same as mine, they said it was made up of three different IHI turbo, so I would like to put a new one on but its money I don't want to spend at the moment and the other is working ok, so I'll leave it be for the time being.
Cheers Bruce.
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