Oil leak Sump of rear Main? Also Miss could be a Rod

[Bz Kn33z]

I was giving the old VN some crap last night (VN V6 Manual sc-14) for people that dont know, and i was in 4th gear at high revs and i herd a pop sound coming from the motor like a seal of gasket maybe so i back off and there was smoke coming into the car and i pulled over, lifted the bonnet and there was smoke everywhere i couldn't see any leaks and i looked down the back of motor and seen an oil leak and it was leaking all over the extractors so i thought that the sump gasket gave way and there was a puddle of oil under the car, its all under the gear box to so i thought it could be the rear main seal maybe.
I also herd it missing after it happened to so today i put a lil oil in it started it up the miss was still there and it was idle ok for 5-10sec then drop in revs so i thought it might have bent a Rod? I took the rocker cap off and it was chuffing out the hole like a Choo Choo Train, i also put my hand at the back of the exhaust and it is spitting out small specks of black dots aswell, and the water in the filler bottle is the same colour so i dont think its done a head gasket, also i replaced all seals and gaskets with a VRS gasket kit 3 weeks ago. Any info would be great ask me some Qs and i will answer i just wanna get it fixed thanx

[vnv8driver]

if it was a rod it would be all the time, sounds like youve done a bearing.

Leaking on the collectors or extractors/headers? could be rear main seal..

[Bz Kn33z]

Its not a Big end cause i know what they sound like from the old motor, well you cant really hear the miss on idle but when you rev it abit you can hear it so is there any tests that i can do to rule out a few things>?

[Pub247]

Get comp gauge and test your compression sounds like you might have done some damage to your rings. The amount of blow by you say you have lends credibility to it being rings. I would also be checking your oil pressure. I'm sure its not a rod or bearings you havent described any noise that even comes close to what they sound like.
Check your oil pressure around 40psi at idle and it should come up quick no more than 15secs if that.
Dont discount headgasket just because it hasnt contaminated your water/oil doesnt mean it hasnt let go.
So Check Compression. If low pour a bit of oil in your bores and check again if it reads higher rings are worn/gone.
The pressure of boosted motor may have pushed the rear main out. Did you replace it aswell? if so it may not have been sitting correctly (square) and could have caused it to blow out

[Reaper]

Doesn't sound healthy whatever it is.... Usually when a rod lets go you will know about it in no uncertain terms. It will make a hell of a sound (same goes if you spun a bearing). Give it a compression test, you may have a broken piston, cracked head, cracked a bore(s) or even possibly a blown head gaskit (although it sounds worse than that from your description). Either way it sounds like you are in for a rebuild.

Reaper

[Morton]

Holy ****. You are SO lucky you weren't going REALLY hard Bz Kneez. Seriously. When I was up in Brisbane (they have a WICKED street scene) I was lucky enough to witness an 240sx spring a similar leak from the back of the motor. Soaked the engine and extractors in oil.

The driver only just brought the car to a halt, and before him and the passenger could even get unbelted, it just exploded. NOT fun. They both got out, but not before sitting there stunned for five seconds, frozen solid. The whole thing was torched.

[vnv8driver]

you could of done anything mate, just start it up with the oil filled and hold the accelerator down, youll soon find out whats wrong.

[Pub247]

you could of done anything mate, just start it up with the oil filled and hold the accelerator down, youll soon find out whats wrong.

I thought you were supposed to be a mechanic?

[vnv8driver]

I am, im also not a pussy. Chances are the motor will need to be stripped to find the problem is, hold the pedal down and see if something lets loose.

[Bz Kn33z]

Thanx for the replys guys, i will get some cheap ass oil tomorrow and put it in and see what it sounds like.

I didnt replace the rear main seal, just VRS gasket set Cam and put everything back together, could it have something to do with the cam (wade1250) put in on stock timing chain set? looks like i will have to get another motor and put it in there and pull this one apart and fully rebuild it.
Thats what you get when you put your foot down

[vnv8driver]

whatever it is, damage has been done, is the motor stock apart from bolt on's??

[Pub247]

I am, im also not a pussy. Chances are the motor will need to be stripped to find the problem is, hold the pedal down and see if something lets loose.

If you are a mechanic and thats the way you diagnose problems remind me never to take my car to you. From some of the other post i have read of yours today in this section i'd say you are one of the most clueless mechanics i've heard of.

Be kneez i doubt the cam would have directly caused this problem. I would Say that its more likely caused by putting your foot down and running a supercharger at the same time

[Bz Kn33z]

with no tune lol, anything else i should do

[Pub247]

Do the mauals run the same cover plate as the auto? the one that bolts onto the sump and gearbox? If so i'd take that off if you can and get under there and have a look with a torchyou should be able to tell if its the rear main. Like i said earlier get a comp gauge and check the compression.
Also what headgaskets did you use? stock and even race series are not recommend to run with boost. You should really use a copperhead or Multi-layered steel gasket for boost

[Bz Kn33z]

Yeah it has a cover i will look tomorrow pretty p1ssed about it all .
The head gaskets as far as i know where stock just brand new ACL. i will see if i can borrow a comp gauge and on monday and see what it reads thanx 4 the help mate.

[cracker]

headgasket.

[aussieghostrider]

I remember my ex mrs VC commodore had so much blow by that at certain speeds popped out the dip stick and oil would go everywhere.

my solution was use a thicker oil and told her not to rev it too hard LOL

but definately sounds like the rings are gone , pull motor out and complete rebuild or just get a 2nd hand or reco motor

[Cheap6]

with no tune lol

That would be it - 1 bar MAP sensor and tune + > 1 bar manifold pressure and no tune = something breaks.

I'm with the guys suggesting a piston or ring. The leak past the rings on the compression stroke on the dead cylinder or cylinders is blowing oil out the seals and also explains the breathing out of the rocker cover.

Perhaps cheapest and easiest will be to replace the engine with another used one but that means the hassle of changing engine numbers (I'm guessing that also = removing S/C). Depending on what damage has been done to the bore(s) it might be possible to replace the piston +/or rings in just the affected cylinder with the engine in the car. The head has to come off again, as does the sump and you have hone it quick and dirty with a hand held hone and it's harder to make sure everything that should stay clean does so.

With the piston or rings replaced, then you can re-assess the oil leak(s).

[Bz Kn33z]

Still unsure what is wrong with it, motor will come out soon and be put on an engine stand i'll see how bad it is and if its fixable i will be doing bearings and other things to it to get it upto shape for the future 10-12psi,

Thanx for the replies i will pull it down and see whats up with it.
Every1 put in there bets and see who wins lol :P

[Bz Kn33z]

I started the car today put abit of oil in it and it doesnt sound heaps heaps bad it has a miss basically when you hold it at a certain rev its like a spark plug lead is off and you sit it around 2500-3000RPM and it is missing.
So i Pulled the head off the Right hand bank tonight and found that it had a blown Head gasket at No3, first of all i found a metal fragment near the balance shaft and then i found the blown gasket. The spark plugs on 1 and 5 where black to and 3 wasnt as black.
I havnt taken the other side off yet i will do it today so maybe that might be all thats wrong with it i hope apart from the oil leak,

So the plan is get new head gaskets what do people recomend? a thicker gasket and copper? cause its supercharged,
Also replacing the sump gasket with a rubber one and i think it might have done a rear main seal, also how hard is it to replace the rear main seal some1 told me the crank has to come out i bloody hope not.
Also might get a new clutch if funds are flowing my way.

[samuels]

I was giving the old VN some crap last night (VN V6 Manual sc-14) for people that dont know, and i was in 4th gear at high revs and i herd a pop sound coming from the motor like a seal of gasket maybe so i back off and there was smoke coming into the car and i pulled over, lifted the bonnet and there was smoke everywhere i couldn't see any leaks and i looked down the back of motor and seen an oil leak and it was leaking all over the extractors so i thought that the sump gasket gave way and there was a puddle of oil under the car, its all under the gear box to so i thought it could be the rear main seal maybe.
I also herd it missing after it happened to so today i put a lil oil in it started it up the miss was still there and it was idle ok for 5-10sec then drop in revs so i thought it might have bent a Rod? I took the rocker cap off and it was chuffing out the hole like a Choo Choo Train, i also put my hand at the back of the exhaust and it is spitting out small specks of black dots aswell, and the water in the filler bottle is the same colour so i dont think its done a head gasket, also i replaced all seals and gaskets with a VRS gasket kit 3 weeks ago. Any info would be great ask me some Qs and i will answer i just wanna get it fixed thanx

have you looked at the passenger side of the inlet manifold this is a common area for the oil to leak from,this could also contribute to your miss,you may have blown the inlet manifold gasket allowing it to suck in air.
bending a rod you will tend to have a knocking sound all the time(but not always)if you have done a main bearing the noise is indicated by a heavy but dull knock under load.big end noise is indicated by a metallic knock which is loudest around the 60 Km/h with no throttle(throttle closed)

[samuels]

I started the car today put abit of oil in it and it doesnt sound heaps heaps bad it has a miss basically when you hold it at a certain rev its like a spark plug lead is off and you sit it around 2500-3000RPM and it is missing.
So i Pulled the head off the Right hand bank tonight and found that it had a blown Head gasket at No3, first of all i found a metal fragment near the balance shaft and then i found the blown gasket. The spark plugs on 1 and 5 where black to and 3 wasnt as black.
I havnt taken the other side off yet i will do it today so maybe that might be all thats wrong with it i hope apart from the oil leak,

So the plan is get new head gaskets what do people recomend? a thicker gasket and copper? cause its supercharged,
Also replacing the sump gasket with a rubber one and i think it might have done a rear main seal, also how hard is it to replace the rear main seal some1 told me the crank has to come out i bloody hope not.
Also might get a new clutch if funds are flowing my way.

yes crank has to come out,don't be persuaded by people telling you to use a tool called a sneaky pete,yeah does the job for a bit but wouldn't recommend it even more so if yours is S/C'd

[centy]

While you got it apart there are a cheap set of acl rings on ebay atm.
A easy way to check blowby for future ref is to hold you hand over the filler cap while running. If you feel pressure then you have a problem. the breather pipe shoud reduce the pressure to next to nothing or in the case of the engine i got from the dump there is actuly suction in the crank case.
I've also noticed a lot of vn and p's leak at the back of the inlet manifold.
Do you have a catchcan fit and hooked up to you air intake?

[Bz Kn33z]

So the Crank has to come out to replace the rear main seal? damn
Havnt pulled the other side of yet and havnt checked the manifold gaskets i will do it today and write back thanx

[cracker]

I started the car today put abit of oil in it and it doesnt sound heaps heaps bad it has a miss basically when you hold it at a certain rev its like a spark plug lead is off and you sit it around 2500-3000RPM and it is missing.
So i Pulled the head off the Right hand bank tonight and found that it had a blown Head gasket at No3, first of all i found a metal fragment near the balance shaft and then i found the blown gasket. The spark plugs on 1 and 5 where black to and 3 wasnt as black.
I havnt taken the other side off yet i will do it today so maybe that might be all thats wrong with it i hope apart from the oil leak,

So the plan is get new head gaskets what do people recomend? a thicker gasket and copper? cause its supercharged,
Also replacing the sump gasket with a rubber one and i think it might have done a rear main seal, also how hard is it to replace the rear main seal some1 told me the crank has to come out i bloody hope not.
Also might get a new clutch if funds are flowing my way.

told you was headgasket, 100% sure ur motor is pinging that is a weak spot in the holden v6 headgasket i suggest you rethinking ur tuning