80 Series TD Smokes (Blue) when cold

Submitted: Thursday, Nov 28, 2002 at 01:00
ThreadID: 2491 Views:4522 Replies:9 FollowUps:10
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G'day
I had all the compression test done prior to purchase and everything was sweet. But notice that there was blue smoke, underload, when the engine is cold. Is that common amoung Toyota Turbo Diesel? Mine is a 24V 4.2 TD (1997 model). Didn't like the 100 because of the IFS.
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Reply By: Goodsy - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Are you loosing any oil? My turbo diesel smokes when cold but only low revs and a lot of right foot (incomplete combustion). Are you sure the smoke is blue and not grey with a hint of blue? Don't think you've got much to worry about if the problem clears when motor warm.
AnswerID: 9098

Follow Up By: Wil - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Howdy Goodsy

I had a good look today and noticed it puffs when I rev it while still cold. Leaves a trail as I drive it but gradually disappears when operating temperature is attained. Any problem you reckon? Checked the oil and everything looks good. The last service was about 1200km back, oil looks really clean for a diesel. Had a Suzuki before and very new to Diesel Cruiser here..

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Reply By: Bob Y. - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Wil, Have the same model as yours, and it smokes when cold at idle. Doesn't appear once hot. The smoke looks blue, but after 196,000 kms it doesn't use any oil. Been a good vehicle with few problems, put on 3" exhaust, and it makes it better. Pulls better and economy is improved a little. Regards...
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Reply By: Will - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Wil,

Blue/grey smoke when cold indicates incomplete combustion, it is OK in winter until it warms up a little but if it still smokes this time of the year and compression etc is OK as you indicated, you need to get the injectors done.
Depends on where you are, if you are in Sydney call West End Diesel or Hiflo in Melbourne.

Will
AnswerID: 9105

Follow Up By: Wil - Sunday, Dec 01, 2002 at 01:00

Sunday, Dec 01, 2002 at 01:00
Hi the Will

Did a good 370 Km today to a mate's farm & back and the Cruiser ran really well. This guy I visited has a 100s (1998) intercooled 1HD-TE and he said his doesn't smoke at all. I am beginnig to suspect that it could be the Turbo unit that could be leaking a bit and coming out as blue fumes when fired up. After warming it goes away. What do you reckon?

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Follow Up By: Wil - Sunday, Dec 01, 2002 at 01:00

Sunday, Dec 01, 2002 at 01:00
Hi there Will

Did a good 370 Km today to a mate's farm & back and the Cruiser ran really well. This guy I visited has a 100s (1998) intercooled 1HD-TE and he said his doesn't smoke at all. I am beginnig to suspect that it could be the Turbo unit that could be leaking a bit and coming out as blue fumes when fired up. After warming it goes away. What do you reckon?

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Reply By: Janset - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Hi Will.

The bluish smoke I do not think is unburnt fuel as that is usually black in colour.

Bluish smoke indicates oil being burnt, and only happening when cold indicates to me that you are getting an slight oil leak-down from your valve guides.

Over a period of time, the seals on the valve guides goes hard and brittle thus allowing oil to creep past. This is not an area of concern.

I would say in your case, as the vehicle is standing, a small amount of oil is seeping past. When you fire up the old girl this seeped oil is burnt off until it is gone.

Some times this oil smoking can be induced/simulated by finding a long hill and while driving down-hill take your foot off the pedal letting it coast down hill still in gear.

Chances are you wont see it unless bad. Get someone to drive behind you and take a look at your exhaust.

As I said before, in your case it does not appear to be an area of concern.

If you are very concerned you can do a compression test to determine where the oil is coming from. Easy in older petrol engines but more difficult in diesels as the compression is very high which does not allow much room between the piston and the head to accommodate the oil you would have to squirt into the chamber to make this test.

I would not worry about it in you case.

Regards

AnswerID: 9115

Follow Up By: Will - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
janset,
Sorry mate but I will have to disagree with that, black smoke is soot particulates which do not burn (incomplete burn) due to lack of oxigen ie: too much fuel metered by the pump or a faulty pump or leaking injectors.
Blue smoke on a cold diesel is incomplete combustion due to low combustion chamber temperatures (diesel is oil remember?)
Although I agree that the blue smoke could be oil from the crankase ie: valve guides or rings, on an engine that age and with good compression it is most likelly injectors not atomising properly which along with cold temperatures in the combustion chamber do not complete the combustion.
Regards,
Will
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Follow Up By: Will - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Janset,

One thing I forgot to mention, the downhill test only applies to petrol powered vehicles with a throttle butterfly, when you close the throttle the vaccum forces oil past the valve guides and rings and hence the smoke.
On a diesel (like the cruiser) there is no batterfly and no vacuum, plus the injector pump cuts all fuel to the injectors on coasting above 1500 rpm.

Will
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Follow Up By: Wil - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Hi Janset

Took the Big Girl for a blat and had a mate following. There was a small trace of blue smoke while I tried all sorts of heavy footed moves. Could not see anything else. He say it looks very normal. Will take her fro a good run over the week end & report back.

I wouldn't mind some comment from the Cruiser community to see if this is normal?
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Follow Up By: Janset - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
OK Will.
I stand corrected on the blue smoke. What you say does make sense. The only reason I mentioned the above test was because I had the same problem on my first Troopie............But then, you picked it, it was a carby petrol motor.

I think I will now crawl under my little rock again :)

Regards
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Reply By: Member - Howard- Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
I had a non turbo 2H in a 60 series. that did the same thing
blue smoke when cold ok when warm . got the compression checked all ok, seeing motor had 360000 kms I thought of valve seals . however got the glow plugs checked and 2 were crook . I hadnt noticed any problems starting the vehicle so hadnt considered them. in the end problem solved.
hope you sort it out
regards
howard

AnswerID: 9116

Follow Up By: Wil - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Me mate and I had a look under the bonnet & could not locate the glow plug. Any idea where it is situated on a 1HD-T ?
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Reply By: Phil G - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Wil, stop looking for the glow plugs! Direct injection diesels don't need them! Your vehicle is normal. Just drive it and enjoy!

Cheers

Phil G
AnswerID: 9129

Follow Up By: Bob Y. - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Phil, direct injection diesels mightn't need g/plugs, but 90-95 Toyota turbo diesels do have glow plugs, and 95-97 multi valve turbo has a heater coil in manifold, in lieu of g/plugs. Regards...
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Follow Up By: Phil G - Saturday, Nov 30, 2002 at 01:00

Saturday, Nov 30, 2002 at 01:00
Hi Bob,

All factory 6 cyl turbo diesels (12H-T, 1HD-T, 1HD-FT and 1HD-FTE) were direct injection and had no glow plugs. The intake element you mention is only activated in very cold weather.

I think this is all a red herring as far as Wil's original question goes. the other cause for bluish smoke when cold was oil drifting down the crankcase ventilation pipe - common on all toyota factory TDs and of nuisance value only.

Cheers

Phil G
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Reply By: Bob Y. - Friday, Nov 29, 2002 at 01:00

Friday, Nov 29, 2002 at 01:00
Will, The multi valve turbo doesn't have glow plugs as such, it does have a heater coil between the inlet manifold and cross-over tube. this works much the same as the g/plugs, with after glow etc. Cheers...
AnswerID: 9134

Reply By: Will - Monday, Dec 02, 2002 at 01:00

Monday, Dec 02, 2002 at 01:00
Will,

I agree with Phil G.

Enjoy it....

I give you one last hint...

I bought a new Patrol GU 4.2 TD in 99 and it did that from day one, also the test drive vehicle did it.
Also a friend just bought a new one 02 model and it does the same thing...

100 series one is a computer controlled engine and you cannot compare them.

Will
AnswerID: 9206

Reply By: Wil - Monday, Dec 02, 2002 at 01:00

Monday, Dec 02, 2002 at 01:00
Thanks Everybody for the advice..

I'll be Cruizing on my Heavy Gear...

This site is really awesome!!!
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