Engine life

[tinkerbell]

This is a question for both of you, lets say I never go above 3000rpm, with proper servicing etc. realistically how long can I drive my Jazz (even when I get another car, I am not planning on selling my Jazz, I like it too much)? That is when will it 'die' (beyond repair)?

1,500,000 to 2,000,000 km

give or take a few hundred thousand...

[tinkerbell]

and just a side note, i was redlining my wifes brand new jazz with only 200km on the odo...

[EuroDude]

and just a side note, i was redlining my wifes brand new jazz with only 200km on the odo...

A bit of thrashing is good for a new engine, as it helps to seat the piston rings properly. But dont go overboard and redline it every 2 seconds Once or twice a day is enough

[aaronng]

A bit of thrashing is good for a new engine, as it helps to seat the piston rings properly. But dont go overboard and redline it every 2 seconds Once or twice a day is enough

No it's not enough. I always want MOARRRRRRR

[tinkerbell]

A bit of thrashing is good for a new engine, as it helps to seat the piston rings properly. But dont go overboard and redline it every 2 seconds Once or twice a day is enough

well, redlining increases heat and wear, so yes, do not go overboard

sorry if implied that you could do it every two seconds

(which i do on the track in MY car, but would never do in a Jazz, unless it had upgraded support systems)...

[ACE888]

and just a side note, i was redlining my wifes brand new jazz with only 200km on the odo...

when i picked up my new Jazz - had about 7kms on the odo, I did exactly the same, after about 5kms of varied driving to warm the car up sufficiently and let the oils reach it's temperatue, i redlined my jazz a few times too =) i read that it's actually quite good... see...

http://www.mototuneusa.com/break_in_secrets.htm

[Pogi]

I've damaged my muffler, over revving.

Anna knows. har harh ar

[aaronng]

I've damaged my muffler, over revving.

Anna knows. har harh ar

you can't damage your muffler from over revving.

[crx51]

Quite an interesting thread to read this one. I am not a mechanic and i found it rather amazing just hearing all that theory behind a combustion engine. I guess its something that i just dont think of regularly but it all makes sense. I think the level of aggression often gets a bit high on threads like this when different opinions surface but i suppose its not that bad. I doubt anyone takes things too personally..
It would make sense that the rod would stretch though. Im not an engineer but have done a bit of physics through uni and it all makes sense. I mean when i first started driving a car i didnt even think of chassis flex as existing. Just wasnt something i'd thought of.
The rod will stretch, i mean look at the speed that the piston is having to move and more importantly the acceleration involved. To accelerate up the piston bore and then come to an almost instant dead stop and be pulled straight back down... The forces involved when you are talking about a piston that weighs what 500grams or something? Being accelerated that quickly it doesnt surprise me there would be stretch. All materials have a point at which they'll flex or stretch or break. This would also make sense to people who have to upgrade their rods when doing an all motor 10k redline engine or something. The rods are only made to handle a certain amount of stretch due to that certain amount of acceleration. When we go adding a further 1000rpm to our cars or more it adds a massive load on the rods - of course you can combat this to some degree using lighter pistons but it all makes sense..
Its good everyone shares their knowledge, i like thinking about such things.
As for all the aggression, as ive said before - where is the love?? lol

[tinkerbell]

for a direct quote regarding rod stretch see:

http://www.theoldone.com/articles/badtothebone/

This engine produced torque that nobody’d previously seen from a B series engine of any displacement with power peaking at 280+ at 9500 rpm….and it wasn’t leveling off either.

Just like anyone else, I sometimes become overwhelmed by the moment and the old adage, “if some’s good, more’s better, and too much is best” took hold of my mentality….and that thinking proved costly in the end.

I made the decision to go for more rpm, as this thing would certainly top 300 whp at the rate it was running. I figured that about 10,000 to 10,200 would do it……………and it did. It also blew the engine up.

The quench distance, or piston to head clearance had been set at .032”, to effectively give us “zero” quench clearance at 9500 rpm, due to rod stretch. .032” caused the pistons to hammer the head pretty hard at 10,000+, ultimately work hardening the pistons.

#4 piston was the first to shatter, taking out the cylinder, the cylinder head, and a few more ancillary parts in the process. The debris from #4 was in turn distributed to all the other cylinders, courtesy of the intake plenum chamber, leaving no cylinder exempt from damage.

It was an expensive reminder that one needs to think (hard) before making any hair-brained decisions regarding rpm with any engine. You’d think that I’d have been old enough to know better, but……………...adrenaline can be a terrible thing.

[Pogi]

you can't damage your muffler from over revving.

Friend said it does, the over revving made holes in my muffler. >_<

[aaronng]

Friend said it does, the over revving made holes in my muffler. >_<

Rust made holes in your muffler.