Turbo Trouble

[fredthomas]

i have been reading with dread about engine runaway, i was driving up a dual carriageway when the car lost power i could only get 50 with my foot down, and there was loads of smoke out the back and coming in through the air vents,

i got off the road and with the engine ticking over had a look to see if i could see anything obvious,

it was then that the revs went up to about 4k and it sounded like a loud knocking/rattling at the same time.

i limped it home and it did this a few more times, now having read up on the phenomenon i am convinced the dreaded runaway started but i was luck that there was not enough oil to keep it up, now i need a new turbo methinks.

[Davehillbo]

i have been reading with dread about engine runaway, i was driving up a dual carriageway when the car lost power i could only get 50 with my foot down, and there was loads of smoke out the back and coming in through the air vents,

i got off the road and with the engine ticking over had a look to see if i could see anything obvious,

it was then that the revs went up to about 4k and it sounded like a loud knocking/rattling at the same time.

i limped it home and it did this a few more times, now having read up on the phenomenon i am convinced the dreaded runaway started but i was luck that there was not enough oil to keep it up, now i need a new turbo methinks.

 

 

 

Hmmm ive heard of runaways still being driveable afterwords, but the engine is basically a complete mess (injectors clogged with molen metal), pistons buggered due to lack of lubrication. If thats whats happened it will probably mean a new engine including turbo :P.

[fredthomas]

i have been reading with dread about engine runaway, i was driving up a dual carriageway when the car lost power i could only get 50 with my foot down, and there was loads of smoke out the back and coming in through the air vents,

i got off the road and with the engine ticking over had a look to see if i could see anything obvious,

it was then that the revs went up to about 4k and it sounded like a loud knocking/rattling at the same time.

i limped it home and it did this a few more times, now having read up on the phenomenon i am convinced the dreaded runaway started but i was luck that there was not enough oil to keep it up, now i need a new turbo methinks.

 

 

 

Hmmm ive heard of runaways still being driveable afterwords, but the engine is basically a complete mess (injectors clogged with molen metal), pistons buggered due to lack of lubrication. If thats whats happened it will probably mean a new engine including turbo :P.

 

 

 

wasn't a complete runaway as such, just reved quite high for a few seconds, scarey moment when you think the car is possessed

haha, seriousle could have been a lot worse cos the engine was hot

[zorgman]

last week while playing with dodgepot in a clio 170 my turbo went at 90mph (thats how i beat him) anyhow i had runaway exact same as you. take the pipe off going to the inlet and see iff its soaked in oil.

My airbox right thru to inlet was drowned in oil it turns out the shaft had snapped so loadsa oil at high pressure went into system, new turbo off ebay for

[Davehillbo]

last week while playing with dodgepot in a clio 170 my turbo went at 90mph (thats how i beat him) anyhow i had runaway exact same as you. take the pipe off going to the inlet and see iff its soaked in oil.

My airbox right thru to inlet was drowned in oil it turns out the shaft had snapped so loadsa oil at high pressure went into system, new turbo off ebay for

[fredthomas]

yeah freaky though, only a short burst but it got me thinking, thats why i looked it up.

now i need another turbo quick, well hacked off i missed one for 82 quid on ebay this morning, gonna be 200 notes now, bummer

[fredthomas]

ok i am confused

i have the afn engine, so which turbos will fit,

there are hundreds on e bay and mine is rare on there so will an auy one fit and any problems

giving me a headache

[chrispb123456]

The MK1 AFN engine uses a normal fixed vane turbo, The AUY engine is a MK2 VNT (variable nozzle turbo) so no you cannot fit that one.

[seatkid]

The MK1 AFN engine uses a normal fixed vane turbo, The AUY engine is a MK2 VNT (variable nozzle turbo) so no you cannot fit that one.

Sorry chris but Mk1 90bhp variants e.g 1Z, AHU are fixed vane, wastegate controlled turbos. 110bhp models AFN etc are VNT turbos.

[chrispb123456]

The MK1 AFN engine uses a normal fixed vane turbo, The AUY engine is a MK2 VNT (variable nozzle turbo) so no you cannot fit that one.

Sorry chris but Mk1 90bhp variants e.g 1Z, AHU are fixed vane, wastegate controlled turbos. 110bhp models AFN etc are VNT turbos.

OK Seatkid I stand corrected :lol:

[seatkid]

OK Seatkid I stand corrected :lol:

Don't worry Chris.

 

As usual I would recommend anyone changing anything on any car, to carefully check part numbers etc. Its rare that engine variants share parts like Turbos. There can even be variations during the production run of an engine variant, so it may even depend on engine no.

[fredthomas]

well i got out to look (i use this term generally cos i could only see it with a mirror and a torch) it has siezed solid and oil everywhere, fairly safe to say gone to turbo heaven, it is a 028145702P type, not easyto get hold of.

any one know what bthis means and will others fit

[zorgman]

110hp uses

vnt15 or

gt1749v

both vnt units both will will fit as mine was a vnt15 now its got the gt1749v

sharan/galaxy/alhambra all same check out other 1.9tdi units as the passat one fits not sure about rest of them.

as above yes stall engine if it happens if you can depends how good clutch is as i read of a guy in usa with a rabbit (golf) ripped his clutch to bits the engine went cosmic and blew its brains out. Very common on renaults for engine to blow not so much on vw's when turbo goes

[chrispb123456]

Hi Fred

You may find this site useful if you haven't sourced your turbo yet.

 

http://www.essexturbos.com/content/ford-galaxy-tdi-2

[seatkid]

Having come across this somewhat creative fix :o posted by Fred, I'm not surprised his turbo died and I predict his replacement will have a short life too.

 

Ignore oil pressure warnings at your peril Fred! Surprised your turbo lasted as long as it did. :rolleyes:

Edited October 10, 2011 by seatkid

[chrispb123456]

Having come across this somewhat creative fix :o posted by Fred, I'm not surprised his turbo died and I predict his replacement will have a short life too.

 

Ignore oil pressure warnings at your peril Fred! Surprised your turbo lasted as long as it did. :o

Sherlock holmes I mean Seatkid you've been digging deep :rolleyes: sounds like a classic case of blocked/restricted sump strainer, forgotten oil and filter changes.

[fredthomas]

Having come across this somewhat creative fix :o posted by Fred, I'm not surprised his turbo died and I predict his replacement will have a short life too.

 

Ignore oil pressure warnings at your peril Fred! Surprised your turbo lasted as long as it did. :rolleyes:

 

cheers for the input guys but just for the record,

the fix i did was to stop the thing making a noise only

i had the pressure checked by a garage who said there was no fault with the oil pressure

and as it turns out it was an electrical fault making the oil beeper come on

the turbo as it turns out was on its way out when i got the car, there was always a lot of smoke on startup ant the amount of oil in the intercooler pipes was excessive when the belt went,

i have been fixing cars for 30 years and joined this forum cos i was unfamiliar with this particular beast, i am also a qualifies electronic test and service engineer, and i have been to university studying electronic engineering

incidentaly the oil light still works

[fredthomas]

another point, if there was low oil pressure, you could not get runaway or oil in the pipes surely

[fredthomas]

no?

[Mirez]

No :)

 

Excessive oil in the intercooler pipework (since there would be a small/normal amount in there) is from either failed seals in the turbo or from excessive blowby from worn piston rings. You don't need high (or even normal) oil pressure for either to occur although both conditions would be exasperated by high pressure.

[seatkid]

The low oil pressure that set off the beeper was probably intermittent - the ECU probably latches the fault as its regarded as serious until you at least turn off the ignition.

 

Once the bearing starts to fail due to poor lubrication (usual reason), the seal follows quickly. Once runaway starts, the high rpm and massive inlet suction would drain the sump quickly unless you somehow stall the engine.

Edited October 22, 2011 by seatkid

[fredthomas]

The low oil pressure that set off the beeper was probably intermittent - the ECU probably latches the fault as its regarded as serious until you at least turn off the ignition.

 

Once the bearing starts to fail due to poor lubrication (usual reason), the seal follows quickly. Once runaway starts, the high rpm and massive inlet suction would drain the sump quickly unless you somehow stall the engine.

ok point taken but i cant check any thing til i get the car back, it has been in a week and a half just to change the turbo, i didnt have the time then but i do this week so i will investigate further

[fredthomas]

The low oil pressure that set off the beeper was probably intermittent - the ECU probably latches the fault as its regarded as serious until you at least turn off the ignition.

 

Once the bearing starts to fail due to poor lubrication (usual reason), the seal follows quickly. Once runaway starts, the high rpm and massive inlet suction would drain the sump quickly unless you somehow stall the engine.

ok point taken but i cant check any thing til i get the car back, it has been in a week and a half just to change the turbo, i didnt have the time then but i do this week so i will investigate further

another point the runaway stopped probably down to the turbo siezing, it was solid when i had a look

[fredthomas]

another point i hadnt had the car very long, a month or so, when the tensioner went, and it took be 3 months to put it back on the road, mostly due to bad weather and the lack of somewhere sheltered to work. all in all in the year i have owned this thing it has been off the road more than its been on, i am beginning to wonder if it is all worth the effort

[fredthomas]

The low oil pressure that set off the beeper was probably intermittent - the ECU probably latches the fault as its regarded as serious until you at least turn off the ignition.

 

Once the bearing starts to fail due to poor lubrication (usual reason), the seal follows quickly. Once runaway starts, the high rpm and massive inlet suction would drain the sump quickly unless you somehow stall the engine.

a sudden and intermittant drop in oil pressure could only be the pressure relief valve i assume, had it on an allegro, my first car, not the easiest thing to cure