F**K, but it had to happen sooner or later, lol
Turbo Mini Forums

At the risk of sounded stupid, can someone explain a "wet test" please. I took the car out this morning and had it on boost and didnt seem to throw any oil out? im now confused.
Cheers
Shane

a wet comp test is just squirting some oil down the bores before taking a reading. If the reading goes up significantly then your rings/bores are goosed.

A wet test involves squirting some oil in each plug hole and then doing a compression test. The oil helps the rings seal up and the pressures should rise. The cylinders that dont have an increase in pressure are the faulty ones.
Cheers
Dan

"So wat we gonna do tonight Brain?"
"Same thing we do evernight Pinky!"
"Try to take over the world!"

Thanks chaps, will give that a go. if the rings prove to be ok (which I doubt, but I live in hope) other than a blocked breather, what else could be the problem?
Cheers
Shane

Erm,

exhaust guides could be baggy, and the seals have just popped off, but really it looks too much oil for that.

I have no doubts that the head is not at fault, its a fresh benross special, been on less than a month.
Cheers
Shane

Ah, you can rule that out then!

It could be worth getting an old plug and butchering it to fit a tyre valve/ ailine connector, then you can squirt air into a cylinder and listen for leakage.

website:- http://www.terryhunt.co.uk

Will try a leakdown test and wet test one eve this week, how long should I leave for a leak down test?
Im confused to be honest, have taken off the breathers and put them into a bottle, been out in the car and replicated the driving conditions that it happened under and it hasnt spat out any fluids. depending on the results of repeatin compression tests I might clear up the oil slick, fit m catch tank and see what happens?
Cheers
Shane

sounds like it might be the breathers then.

Im not sure, all I have removed is the chrome filters? If / when I fit a catch tank, does it need to be vented (to release pressure)?
Cheers again
Shane

yup, needs to have a vent of some sort

i'd see how it goes, if the engine wasnt smoking, then i suspect its something daft, not sure what mind!

dont pull it just yet

I smoked a tiny bit, there is a little crap kicked out of the exhaust too, you get a few spots on the floor behind the car if its started or sat on the spot for a while.
How long should I leave the cylenders pressurised for on a leak down test?
Thanks for the help guys, appreciate it.
Shane

cylinders will always leak to an extent,

a proper leaddown test is a regulator with a gauge before and after, comparing the readings will give a percentage of leakage.

on the of chance you will be passing my way you can borrow mine.

Cheers for the offer mini13, but dont usually make it past ipwich, lol, right will just be doing a wet test then.
Cheers again
Shane

Have a look in the FAQ for comp testing and leak down testing guides

AlexF

Could this not be a head gasket failure?

When I had the problem with my torque wrench I went through 3 gaskets. At one point I suspected that there was a problem with my rings as the breathers were chucking out a lot of smoke. Once I had replaced the gasket (and it was correctly torqued up) the smoke disappeared.

Just a thought as you have recently replaced the head/gasket.

In the 13's at last!.. Just

Hi,
Could be as the combustion pressure could leak across to the push rod holes.
But the compression doesn't seem far off at the moment...
Cheers,
Gavin :)

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shane, fit the catch tank and see what happens

you will always get a little blow by the rings on a worn engine it the piston and ring department on BOOST!

I did wonder about the head gasket, but im confident my tourque wrench is accurate as have checked against another in the past. At the moment I have cleaned up all the oil and fitted a temp catch tank (namely a milk carton) will top the oil up tom evening and see how it goes, not yet done the wet compression test.
Another thing I thought it could of been, but I dont know how likely it is that it could of been this but, I had came off a rounderbout at speed, and the exit I came off is positioned so that after heavy cornering in the rounderbout and taking the exit would meen the oil in the box would of changed side of the engine it was on, so could the oil have "slopped" (for the want of a beeter word) the other side of the box and some been thrown up the flywheel housing breather? Hope that made sense?
Cheers
Shane

best way to check if it is blocked breathers mate is to , start engine as it is and take of filler cap and have a look in the rocker cover all should seem fine.

then refit kn oil breathers and start engine, if they are blocked then you will see oil being squirted up the push rod holes and oil being pushed past dip stick.

remove then try again, this is what i done.

always looking for them bigger bunches of bannanas

This might be your problem mate, as someone said earlier its probably summat daft. Stick with the catch tank and leave it alone.

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


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"So wat we gonna do tonight Brain?"
"Same thing we do evernight Pinky!"
"Try to take over the world!"

Well Ive been out on a mission in the car this eve (with catch tank fitted) I revisited the roundabout/duel carrigway where the car spat the oil out, took the junction in the same manner, hit full boost on the straight, pulled over at the end to check, and to my delight, a nice puddle of oil sat in the catch tank! What a relief! So changing from a hard right bend to a hard left very quickly was the problem (to which im most supprised) I tried it again to be sure and it did it again, the rest of the eve after some spirited driving I didnt succeed in getting tit to shed any more! RESULT!
Cheers for the help guys.
Much appreciated
Shane