Blown Rb25.....but How?!?!?

[vitz_n1]

Ok, i dont know if i just have horribly bad luck or i am doing something wrong. Its a bit of a story so prep yourself.

I have a 32 which i am doing an rb25 conversion in. I bought an rb25 originally, put it in, wired it all up, did a comp test and no good - cylinder 2 gone. i decided to finish it off and start it so that i know i have done everything correct. so i started it and it ran perfect, actually started AWESOME first crank every time.

So i pulled the motor out, stripped in down and determined it was blown ring-lands. By this stage it was only a week or so till i got my license back so decided to buy ANOTHER rb25 as i couldnt bring myself to just replace the piston from the first motor without rebuilding the motor properly, getting block machined crack tested, do bearings yada yada......

Anyway, the second motor i bought through a wreckers with a warranty on it, AND had him do a comp test on it in front of me. (just on a stand not with the motor in the car).

I had to switch over the throttle body, water temp sensor and sender, o2 sensor, and CAS. I dropped the motor in, and it wouldn't start. It seemed to be flooding? it would cough on first crank and then just crank and nothing..... I tried starting it on WOT and it started, BUT made a HORRIBLE knocking noise and i shut it off after about literally 1 second.

I did another comp test on it, now there is no comp in cylinder 3

I just wanna know what it could be. Is there something im doing wrong or is it just bad luck?!?!?! i dont know how a motor could blow that easily, surely they are not that temperamental.

Please help, i just wanna get the thing running.

Cheers

[GTR-N1]

Commiserations... eh?

Can you at least get that refund on #2 asap?

RB 25 should be very sturdy.

Waiting for better advice to come...

Best Regards,

[vitz_n1]

thanks mate.

Well, im not gonna be asking for a refund, just a new motor.

My issue though is, IF he does swap it over am i doing something wrong to blow the motor???? I dont want to just get another one and blow it also....

Any thoughts or input would be great as the warranty is over on Tuesday.

Edited July 27, 2008 by vitz_n1