Killed my EZ30. Amature engine replacement thread

[THERB3]

If you don't mind me asking, what did the block set you back ?

[KiDo_Tuning]

However, after a single test run I spotted the oil light flickering on and off at me. I pulled over and heard the engine knocking.

That would do it.....oil pressure problem....oil starvation....

Especially when taking high g turns or rapid L to R turns or vice versa....engine starves of oil....e.g. crank, rods, bearing(s) in the crank area.

Unless back to the fuel? car was running lean....

Last time you checked oil? was it to the appropriate level?

When the fuel pump drops fuel pressure at all, the engine will quickly lean out due to lack of adequate fuel flow. The fuel pump will happily supply 265lph but if 175lph is able to leak out of the fuel system back into the tank(quite easy, think about a garden hose with a split line and then triple the pressure) then you only have 90L/h or under 1.5L/min or under 250cc per cylinder of fuel flow

For future E85 posterity, E85 will not knock but it will happily bend a rod or hammer out a big end bearing BUT there is warning... the engine will significantly slow in engine speed/acceleration as the engine has to work very hard to overcome the expanding energy being compressed prior to TDC in the cylinder

[Scyance]

If you don't mind me asking, what did the block set you back ?

Picked up a long motor for $300 with a cracked timing case and missing a solenoid, both items can come off the old motor. (I hope. OH jesus, I hope the timing gear doesn't have to come apart to change the timing case over...)

[KiDo_Tuning]

If you don't mind me asking, what did the block set you back ?

Picked up a long motor for $300 with a cracked timing case and missing a solenoid, both items can come off the old motor. (I hope. OH jesus, I hope the timing gear doesn't have to come apart to change the timing case over...)

Where is the crack?

[alexeiwoody]

However, after a single test run I spotted the oil light flickering on and off at me. I pulled over and heard the engine knocking.

That would do it.....oil pressure problem....oil starvation....

Especially when taking high g turns or rapid L to R turns or vice versa....engine starves of oil....e.g. crank, rods, bearing(s) in the crank area.

Unless back to the fuel? car was running lean....

Last time you checked oil? was it to the appropriate level?

When the fuel pump drops fuel pressure at all, the engine will quickly lean out due to lack of adequate fuel flow. The fuel pump will happily supply 265lph but if 175lph is able to leak out of the fuel system back into the tank(quite easy, think about a garden hose with a split line and then triple the pressure) then you only have 90L/h or under 1.5L/min or under 250cc per cylinder of fuel flow

For future E85 posterity, E85 will not knock but it will happily bend a rod or hammer out a big end bearing BUT there is warning... the engine will significantly slow in engine speed/acceleration as the engine has to work very hard to overcome the expanding energy being compressed prior to TDC in the cylinder

That'd be a little vague....everyone would start worrying about their motor every time the revs drop.

Hopefully people will learn from Scyance's experience and invest in a wideband sensor + afr gauge, prior to switching anything in their fuel system, ESPECIALLY if they're planning on switching to a different fuel type.

(At the very least have a laptop with a tactrix cable to log/view the oem O2 sensor readings.)

[Scyance]

If you don't mind me asking, what did the block set you back ?

Picked up a long motor for $300 with a cracked timing case and missing a solenoid, both items can come off the old motor. (I hope. OH jesus, I hope the timing gear doesn't have to come apart to change the timing case over...)

Where is the crack?

[vertix]

You're going to have to be more specific, can't see anything wrong in that pic

[KiDo_Tuning]

That'd be a little vague....everyone would start worrying about their motor every time the revs drop.

Hopefully people will learn from Scyance's experience and invest in a wideband sensor + afr gauge, prior to switching anything in their fuel system, ESPECIALLY if they're planning on switching to a different fuel type.

(At the very least have a laptop with a tactrix cable to log/view the oem O2 sensor readings.)

Revs drop? I am referring to a rev's 'holding' as per FB conversation

FYI: I know of a very high profile MY11 WRX that had the same fuel issue, although that was because the 4g/rev limit was active and it cut fuel flow above 4g/rev due to limits of stock ECU. WRX, STi and SH9 cannot raise the number above 4g/rev but there is a hack to allow it to be doubled etc. It wasnt active and owner lost an engine or 4...

[<GB>]

I bet that car had low oil pressure for some time and that caused the issue and then the leaning out probably caused it to tip over the edge. if you don't have enough oil pressure then your car wont be in hydrodynamic lubrication so any excess load caused by a full throttle and lean out would cause bearing issues/crank damage

[Surge]

Just curious what would have caused low oil pressure?

[<GB>]

Just curious what would have caused low oil pressure?

excessive bearing clearances, blocked oil pick up, broken oil pickup, stuffed oil pump, blocked oil filter

[alexeiwoody]

Just curious what would have caused low oil pressure?

excessive bearing clearances, blocked oil pick up, broken oil pickup, stuffed oil pump, blocked oil filter

Maybe Scyance can post up what he finds during the engine rebuild/replacement?

Would do no good to have the same issue continue into the new engine, like a cracked oil pick up!

[<GB>]

what was the service history like? how many km is the car? what oil did they use at service?

[Scyance]

what was the service history like? how many km is the car? what oil did they use at service?

Just curious what would have caused low oil pressure?

excessive bearing clearances, blocked oil pick up, broken oil pickup, stuffed oil pump, blocked oil filter

Maybe Scyance can post up what he finds during the engine rebuild/replacement?

Would do no good to have the same issue continue into the new engine, like a cracked oil pick up!

Well, I think you guys might be on the right track there. My car is VERY low. Just put it up on stands to begin work and I've found the sump pan has had a bit of a hit. It has the almost unmistakable outline of the oil pickup pressed in to it.
Is the Cam Chain tensioner hydraulic? Because that had started rattling at idle as of late. Maybe coincidence, maybe not.
The car has 168,000km on it and I've put at least 50,000km on it in 3 years, always servicing it myself and using 10w40 synthetic, every 10,000km.

[kiks]

To be fair.

Yes you drive a stupid low car. This is a lesson. Low cars are for formula open wheelers on race tracks. If there is any reduced clearance at all to the pickup then it's game over.

5000km oil changes alternating a diesel oil like penrite hpr diesel and a decent full syn is the go for keeping any golliwogs out. Detergents ftmfw. Auto trans oil also works wonders as a detergent before dropping oil, pour a litre in. Warm up at idle for 10 mins, drop when hot.

Yes low oil pressure could cause the tensioner issuer making it rattle. EZ's very commonly rattle from 145-165k km old though. It's just a thing they do, usually when cold only though.

With the new one can I suggest stock height or less cattle grids and ruts at 140kmh .