Mertro turbo is running alot better, inter cooler next check what i've done frm page 3
Turbo Mini Forums

chaps my friend hasa mini turbo & i've been trying to help him sort a problom he has with it

its a metro turbo motor in his mini, absolutely syandard, not even a performance air filter & its develop a problom, it misfire could n burps & sounds like its only running o 3 cylinders

cause its an old engine he's been running it on lead replacement juice & unleaded!

we've gone over the service items/belts/fluids the lot, reset the tappets as they needed it, checked for boost leaks & all seems in good order, i gotta check for boost leaks again but we're thinking it may be a burnt out valve seat or two due to running unleaded, what do you guys think, can a burnt valve or two cause a misfire??? or make the motor sound like its running on 3 cylinders

Edited by clubminiflip on 22nd Feb, 2010.

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

Compression test should be your first thing to do next.

thats what i was thinkin tom, i have'nt used my since i bought it, what at i looking for on that compression test that to diagnose a valve problom, i remeber you put oil in the plug hole to check for piston ring/bore wear but cant remeber for valves, i know they would be a loss of compression if the valve seats burnt through

it had a few probs in the 1st place, broken vacume pipe

could the electronic dizzy module give misfire probloms if its iffy? or is a electronic device thats a works or does'nt type device

i'm gonna check voltages at the weekend, unless i get snowed in, crap weather for messing with cars outside brrrrrr

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

Stop guessing and do the comp test. Then go from there. Chances are its burned a valve seat and no amount of pissing about with ignition components is going to help in that case.

i;m sittin here chuckling away tom, i thought you were from alcester, but your straight talking like a true northner LOL i like it

i'm just checking the other bits n bobs ignition consumables/wearables etc as the vacome pipie was split off so i was hoping it was a knackered lead/plug/cap/rotor-arm/boost/turbo pipes/hoses just to rule tem out as they're quick to chk

i reckon my burnt valve guess is right, i'll check compressions etc this weekend outside under a up n over door, in the cold,

do you all here the violins in the distance LOL D

other than what i've said i cant think of anything else on the stock setup that would cause a misfire/running on 3 cylinders?????

i only have a spare standard non-turbo lo compression head, it should be ok as a temp measure should'nt it? its not warped & de-coked, cleaned up & all Minty-fresh!

its a very very mildly driven car, never gots out of 4psi of boost to be honest

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

is my theory correct then, before i chk the compression, seeing as the engine does'nt rattle/smoke of any colour other than what is normal, then a "half" educated guess points to a prob with the valves/seats

all depending on the compression test results!!!!

much appreciated Tom & all, i'll come back with test results

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

i've good the chance to drive the car today, a proper drive from cold to warm, its smooth-ish at around 2000rpm

i can hear a sort-of puff puff sound from the upper part of the motor when driving & the oil pressure light flickers now n again but its not ticking over to well, its dropping tickover rpm a bit,

when started & when just sitting static the oil pressure lights i fine with a constant tickover rpm

even though it seems like its running on 3 cylinders/misfiring the trbo engine really does pull hard without too much effort & it is completely standard

i'm going to have a good look over it tomorrow afternoon & compression test it

if possible can someone pop up a pic of the dizzyy & where the plug leads go

much appreaciated all

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

Standard ignition on the left. Dizzy drive 180 degrees out on the right.



EDIT: Attachments not working.
EDIT2: On my flickr now

Edited by apbellamy on 15th Jan, 2010.

Dear god man, stop fucking about driving it around and compression test it!!
Also check valve clearances. You could have had the answer by now!

haha now that made me laugh.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

RIGHT! Tomf Lol well blow me, you 'n' the gatepost down i've done the compression test!!!!!!!! shock horror D i'm not the fastest worker ;OP

i did find a few probloms before i did the compression test though, problom 1 was the spark plug in No1 was cracked in two & amazingly still sparking, it was actually in two peices, the rubber of the plug lead was holding the two halfs together :o/
oil was below minimum on the dipstick
& the ignition leads are rusty inside o the contacts so the car obviously needs a really good service with all the consumables replaced!

right then starting from cylinder number 1 water pump end & 4 being clutch housing end!
1 = 180 psi
2 = 30
3 = 175
4 = 180

i've added oil to cylinder 2 to see if it improved & it did'nt

i've heard from a few other ppl that sometimes (if luck is on your side) that if one of the rockers is tightended down too much then obviously it holds the valve open so you loose compression on that cylinder

a thought i had was because cylinder 3 is down 5psi it could be the head gasket has blown but causing more compression loss to cylinder 3

what does everyone think is the possible problom???? very much appreciated from dave

Edited by clubminiflip on 19th Jan, 2010.

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

Check your valve clearences but my money is on the head gasket being blown.

Change the gasket, oil, coolant and a thorough service.

If something is worth doing, it's worth doing half of.

obviously have a good look at your head while it's off. Personally I'd be popping the valves out above no 2 for a good inspection.

my suspisions also make me think it could be burnt valve seat due to running unleaded petrol as the car is an F reg which i'm 98% sure does'nt have hardend valve seats

if the seat is burnt away i'll loose my compression past the valve wont i?

the car does'nt smoke or use oil or water in any way & other than the odd usual a-searies oil leak the engine seems ok

your opions are really appreciated chaps n chics

Edited by clubminiflip on 19th Jan, 2010.

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

If its a metro turbo engine none of them were ever unleaded from the factory.

If something is worth doing, it's worth doing half of.

Do the clearences first then check the compression again. Its the easiest thing to do.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

minimadmotorman my pold man had a h-reg metro turbo & it wass unleaded, factory green 95ron stickers the lot, head had to come off for a head gasket & it had hardened seats, the dick-head sold the car though grrrrrrrr was a great engine too, gone a bit OT now aint we LOL

keep the suggestions coming, i'm off to find my feely gauges to check the rockers

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

Your probably right tom but it doesnt take long to check just to be on the safe side

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

If something is worth doing, it's worth doing half of.

looks like burnt valve in 2

now we know its a head off job, i've not worked on a metro before, apart from suspesion & general servicing

obviously i want to dismantle as little as possible, can i get the head off without removing the carb/intake/turbo

ie: do you think there is room to undo the intake/exhaust push them back to the firewall & unbolt lift the head off?????

or do i have to deal with the damb exhaust clamp? & have to remove bits,

any recommendations of bits n bobs to do/check whilst the heads off? any tricks i can do to help!

i'm off to pick up the service items a bk450 head gasket & head gasket set

are bk7es plugs ok as i think they should be bk6es???

Edited by clubminiflip on 19th Jan, 2010.

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

yes you can undo the manifolds and push them back, it will move enough on the knuckle on the down pipe, i've done it.

head off is a peice of piss on a metty.