GQ TD42 turbo diesel took in some water

[naif]

hey guys, after a bit of help.

we went to take my mates patrol out for some fun as we have had a fair amount of rain here.

we just hit the track and went thru the first puddle and just as we got out the engine stalled,

i didnt realise he had actually removed the inner guard lining which ment water could be flicked up and sucked directly into the airbox.

he then cranked it over and it started fairly easily, didnt struggle at all, but it was and still is blowing a shitload of whitish blue smoke.

the engine runs almost perfectly, it is just a little rough at idle and upto 1k rpm after that it runs fine, but still blows white smoke.

what could the problem be? i hope he hasnt caused any seriouse damage.

[mavzilla]

The run problem could be a bent conrod in the engine which is common after inhaling water

[michael a]

Low compression makes white smoke that goes with bent rod also.

[Big Red Toy]

Rebuild time, Try East coast 4wd in NSW, got my motor off them & is the goods so far
Cheers

[AdrianGQ]

Hate to say it but the symptoms are identical to mine when i did the same thing and mine had bent the rod in no 4 and 5 had lost some compression also
It also stuffed the head by putting some good cracks in it i would be getting a compression test done first off and that will show if the rod is bent or the head is leaking compression after that it may be rebuild time

good luck

[xenith]

hi mate just fixed mates same thing bent rod put sechand one in it all good now was peace of piss pm me if need advice

[love ke70]

how does white smoke = bent rod?

white smoke is steam, so u might still be sucking in a little water, have you cleaned out all your pipework?

do a compression test and see if its still decent.

i would suggest an oil change, you will probably have sent a whole heap of water past the rings into the oil.

[xenith]

white smoke not steam two different things when compression is to low the fuel is not burnt properly

[michael a]

love ke70
Posted: Sun Aug 26, 2007 7:00 pm

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how does white smoke = bent rod?

white smoke is steam, so u might still be sucking in a little water, have you cleaned out all your pipework?

do a compression test and see if its still decent.

i would suggest an oil change, you will probably have sent a whole heap of water past the rings into the



If you knew anything about a deisel you would know that low compression makes white smoke. this is deisel that is not being burnt. There is a big difference between white smoke and steam.

WATER MAKES STEAM D#*K HEAD

[love ke70]

wow, some people are on a mighty high horse arnt they.
how low must the compression be to get this happening?
dads 3litre patrol was running around 200psi compression when it should have been 400+ and no signs of any smoke.

i wonder what inspires people to call others a dickhead on a public forum when not knowing them, and the post they made was actually a question, and not an attack of any sort. and better yet, you also agreed with the post i made, that water will also make steam which is more commonly called "white smoke out my exhaust"

put your pants back on guys, we wernt all born with the knowledge of a diesel fitter

[xenith]

When u get water in the cylinder it can not b compressed at all unlike air so it bends the rod. It only takes the rod to bend mm to loose heaps of compression as there is not even mm's in the cyclinder at TDC sorry to tell u the bad news

[AdrianGQ]

I think mine was about 180 psi when i bent mine and the piston sat about 4 mm to low at top dead centre

[turbodave]

How much water will it take to do damage? As small as a few millilitres getting into the cylinder? Or a bit more, like a couple of shot glasses worth?

Mine did the same thing. Didn't stall though, it just wouldn't rev. Will have to get a comp test done now. Although, it is running as good as always. Really hoping i haven't done any damage.

[xenith]

as little as a few milliliters is all it can take. though in your case it may have only wet the filter and made it hard to suck in air. But thats when u should shut down and dry it out so as not to bend anything

[bj on roids]

i agree on the bent rod and low compression




steam comes from water

white smoke is not steam

[mattstar]

I think it would be safe to say if you had steam coming out your exhaust, that's were the water is, in the exhaust.
If there's water in your engine (enough to make visable steam) I don't think you'd have the ability to turn it over to push the steam out

[naif]

just an update, you where right, it was a bent rod in cyl 4 (from the front)



and upon disassembly all the top half of the big end bearings where found tobe very worn as they where showing copper colour,

just got top end to go back on now, head, inlet manifold, exhaust manifold, turbo, injection lines.

should be back up and running this afternoon

cheers for your help. greatly appriciated.

[love ke70]

oh shitty, thats very bent.
well done

did you compression test it before you pulled it down? i want to comp test mine. im not convinced all my rods are as straight as they should be...


cheers, andrew

[naif]

no, no compression test, but all rods come up flush with the top of the block, the bent one sat down around 15mm.

[love ke70]

seeings as you have the motor apart, im gonna ask even if i get flamed for it.

can you drop the pistons out the bottom of the bore? on all the motors ove played with you cant, but ive never pulled down a td42. if i was to find a slightly bent rod or 2, and i know i have no blowby, i would consider trying to do ti without pulling the head or anythin.

would it be possible to drop the rod down far enough to get the gudgeon pin out, swap rods and re-insert the rod, and put the sump back on?

just a scary thought i was having, please be nice haha

cheers, andrew

[marko]

no room wat so ever to do that. Only takes an hour or so to get the head off

[naif]

yeah as marko said, better off taking the head off, you need to get the head checked anyway.

if you dont remove the head, it would be possible to pull them out thru the bottem, BUT your gonna have to drop the box and remove all the timing gear etc. then remove the crank.

didnt get it all back together, the book we had didnt say what tension to do the rocker assembly mounting bolts upto, tried doing them to 30nm and ented up twisting a bolt, lucky it didnt snapp off in the head, mymate then snapped it with his fingers, getting all new bolts today and finding out what tension to do them.

[NissanTuff]

I would say bent rod or two. Seen it happen before. Dosent take much water to do that.

[naif]

all back together and runs better then when he first got it

now theres a problem with the gearbox, sounds like a bearing is on its way out.