When running a car in...

[CaM]

excessive blow by, yuh.

[Snoozin]

blow by is something Euro engines do

But yeah, plenty of WOT = good for running motors in. But don't labour it.

[mr pad]

Cheers for the help. Ill keep everyone posted on what happens. Seems to be going a bit better, might go and invest in a poddy for it today...

[mr pad]

OK! well after changing the oil for the fourth time last night (switched to magnatec), im still getting head chatter on startup, still dosnt want to rev like it should, still using water, oil is still turning grey but not creamy, and there is no white shit showing up under the cap...

Im guessing I have a cracked head? Im going to get this checked out tomorrow by someone who knows what they are doing.

Spoke to the engine builder and he said to change to magnatec, top up the oil, and see if it used any more. Well it still is having a wee drink, oil still comes out filthy as a whore (dark grey crazy swirls). Im covered under the goods and services act right? He said to run it like this for another 500kms and get back to him, but theres no way im doing that in its current state..

$&#$%.

[CaM]

yuh head off for sure.
i sure as hell wouldnt have been driving round with a new engine that's using water. take it back!!!

[Dell'Orto]

Nasty, theres definately water getting into the oil somehow. Take it back ASAP.

[mr pad]

Problem is, engine was built in feilding, I live in chch...

[Dell'Orto]

Who by?

[mr pad]

Mason reconditioners? Please tell me you are in feilding!? SMACK DOWN STYLEZZZ j/k, Does that name ring a bell?

[CaM]

mason automotive does. usually pretty good from what i hear.....
dirty feilding, hometown etc

[mr pad]

Yeah thatl be the one. Have been dealing with Mason, seems like a good sort. So im getting it looked at tomorrow, will let peeps know what happens.

[RedMist]

OK! well after changing the oil for the fourth time last night (switched to magnatec), im still getting head chatter on startup, still dosnt want to rev like it should, still using water, oil is still turning grey but not creamy, and there is no white sh*t showing up under the cap...

Im guessing I have a cracked head? Im going to get this checked out tomorrow by someone who knows what they are doing.

Spoke to the engine builder and he said to change to magnatec, top up the oil, and see if it used any more. Well it still is having a wee drink, oil still comes out filthy as a whore (dark grey crazy swirls). Im covered under the goods and services act right? He said to run it like this for another 500kms and get back to him, but theres no way im doing that in its current state..

$&#$%.

A leakdown test should show if its head, valves or rings that are leaking. My guess is its rings, perhaps using a hard molly ring that hasn't bedded correctly. You really need to give a molly ring a good pounding from word go. The Bunderson went straight on the dyno and ripped shyte first run. I took her racing with the intension of racing 80%, however the competition drove me to put her on the limit. It took over three hours of hard racing to stop the blowby on idle. It now performs wonderfully, I just ensured for the first 5 hours of running or so I didnt hit the limiter.

However this still shouldn't effect power as you have stated. I would suspect another issue, cam or ign timing. This could also explain the carbon in your oil.

[eritate]

Blow by is common once again.

Your engine creates a vacumn And if you take the oil cap off are your engine looses 'pressure' then thats pefectly normal.

Mr pad from the sounds of it... Your engine has a major problem as its just been rebuilt. Id send it down asap to get it rebuilt at their own cost. If you have any problem just go see a lawyer


Mike

[RedMist]

Blow by is common once again.

Your engine creates a vacumn And if you take the oil cap off are your engine looses 'pressure' then thats pefectly normal.

Mr pad from the sounds of it... Your engine has a major problem as its just been rebuilt. Id send it down asap to get it rebuilt at their own cost. If you have any problem just go see a lawyer


Mike

Blowby is not common. Your intake creates Vacuum, not an engine. Blowby is the compressed gasses in the combustion chamber escaping either via rings, valve guides or a crack in the head. Anyone who states that blowby, to the extent of creating a breathing engine, is common in a 4age is talking rubbish. My engine running considerably higher compression than any stock 4age doesnt breath at all. However it used to, before the rings bedded.

And rather than taking the agressive stance here, give the engineer a chance to rectify the issue. Most will come to the party and correct any mistake. Also if your engine builder recommended a certain run in proceedure I would stick to that, even given the recommendations here. It will just protect your back if it does come to any legal ramifications.

[Flannelman]

blow by is when clynder pressure leaks and goes into the crank case and out the rocker cover vent.
ALL engines make air movement (hell, there are pistons in there moving air in and out of the crankcase/sump!)

When the oil filler is cracked and smoke - like burnt oil smoke - chuffs from it then there is a problem. Weather its rings or valve guides, the effect is the same. the motor is loosing power, economy and eating more oil than fuel.
Worn pistons/rings will be rattle where valve guides are alot harder to diagnose. Tho valve guides dont wear out in 250km

[eritate]

Blow by is common once again.

Your engine creates a vacumn And if you take the oil cap off are your engine looses 'pressure' then thats pefectly normal.

Mr pad from the sounds of it... Your engine has a major problem as its just been rebuilt. Id send it down asap to get it rebuilt at their own cost. If you have any problem just go see a lawyer


Mike

Blowby is not common. Your intake creates Vacuum, not an engine. If your talking about the blockspace then its Compression not Vacuum. Blowby is the compressed gasses in the combustion chamber escaping either via rings, valve guides or a crack in the head. Anyone who states that blowby, to the extent of creating a breathing engine, is common in a 4age is talking rubbish. My engine running considerably higher compression than any stock 4age doesnt breath at all. However it used to, before the rings bedded.

And rather than taking the agressive stance here, give the engineer a chance to rectify the issue. Most will come to the party and correct any mistake. Also if your engine builder recommended a certain run in proceedure I would stick to that, even given the recommendations here. It will just protect your back if it does come to any legal ramifications.

Didnt know we were talking about 4ages. I was just talking about engines in general. Like paul said all engines make movement .

I thought blowby is when the piston goes up and comes down - unburnt fuel and air gets into the crank.

If you start your car up and take hte oil filler cap off you should notice a difference ???

[RedMist]

By definition Blowby is the charge "blowing by" the rings. However as its hard to diagnose ring issues without a leakdown it's used to encompass situations that cause an engine to breath. IE exhale oil and air.

In regards to taking your oil cap off and noticing a difference. Because the pistons are traveling up and down they are shifting air on the underside of the piston. As such you will notice an in and an out of air. Blowby would have to be subtancial for you to note anything by taking off the oil cap.
Blowby will cause oil vapor coming out of a catch tank, oil in the inlet track (on those cars breathing back into the intake). Loss of power, due to lack of compression, in cases where the scraper ring and second ring are also damaged there will be blue smoke from the exhaust.

In extreme cases it may force the dip stick out of the retainer.

[mr pad]

Right there ^^^

Thanks dude. Summed it up really well. As stated, I know what blow by is, and what a normal amount is, when its spitting oil and water in your face from a distance I knew there was a problem

As you said, I doubt it will be the rings, that wouldn't cause the head chatter that im getting would it?

But anyway. Will post results tomorrow. Cheers for all the info, gives me some good starting points to work with.

[RS13]

FWIW, my 4age makes a ticking noise from the head when cold, until the oil pressure comes up. When I open the oil filler, it blows a little air out, a few specks of oil too, but I noticed that the oil breather hose is quite perished/blocked.

I'm going to get a catch can, I realise reducing the pressure in the crankcase may lessen ring seal and lead to a little more exhaust smoke, but from what I've read, having no oil vapour into the intake raises power very slightly, and will hopefully stop my motor from leaking oil from the cam covers and sump seal. Does that make sense?

[mr pad]

Yep, that should work sweet, being an older semi-worn motor.

I have heard thats a good thing to do for older motors anyway.

Wish that would fix my problem