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View Full Version : Why it went Bang!!!!!!!!



Bayliss
09-04-2008, 00:14
As some of you already know from watching a few of my vids etc that the hybrid died a week on friday ago, after stripping the motor down i'm prety sure i found the cause but i'd like some of your opinions.

This is the vid where it went bang

http://www.youtube.com/watch?v=sV06BFIloKA

and this is why i think it went with a bang

http://i3.photobucket.com/albums/y67/bayliss064/CIMG0038.jpg
http://i3.photobucket.com/albums/y67/bayliss064/CIMG0039.jpg
http://i3.photobucket.com/albums/y67/bayliss064/CIMG0040.jpg

seanofnp
09-04-2008, 00:21
Aye, i think that may not be exactly how it should, dont quote me on it though. Il consult the local monkey, he may know!

rob-legend
09-04-2008, 00:53
foolin hell, what's the full damage then?

Daz.
09-04-2008, 06:53
Ahh that be not good - not the cam belt then :wink:

northy
09-04-2008, 08:12
nice!

Fair shifting though mate when it was running.....shame. Did u get in touch with smokey ?

Bayliss
09-04-2008, 09:12
i got mself an engine mate just gonna repair a few valves then put my head on it it'll be running before croft

northy
09-04-2008, 10:15
Good lad. Not looking forward to crofty....too open and fast for my little old 1.8! Going to get spanked.

Bayliss
09-04-2008, 11:09
you won't do too bad, i was keeping up with cossies with a 1.8 in round croft, you carry alot of speed into corners at croft, i'm still tempted to take the V6, its great at croft

rob-legend
09-04-2008, 15:42
when you guys up at croft?

cliolord
09-04-2008, 15:42
Did I see a raised limiter on your motor :lol: No further comments your honour LOL

northy
09-04-2008, 15:49
when you guys up at croft?

5th of may

Bayliss
09-04-2008, 15:51
Did I see a raised limiter on your motor :lol: No further comments your honour LOL

yeah u did but the limiter is at 7500 and i never touched it once, lol

cliolord
09-04-2008, 15:59
Did I see a raised limiter on your motor :lol: No further comments your honour LOL

yeah u did but the limiter is at 7500 and i never touched it once, lol

Ah :oops: what was the mileage dude? Water & Oil temps were alright? I can't see alot from the video like :P

Bayliss
09-04-2008, 16:13
Did I see a raised limiter on your motor :lol: No further comments your honour LOL

yeah u did but the limiter is at 7500 and i never touched it once, lol

Ah :oops: what was the mileage dude? Water & Oil temps were alright? I can't see alot from the video like :P

yeah temps seemed fine, oil pressure was about 3 bar so i suppose i'll never know exactly what went wrong

samboRT
09-04-2008, 16:21
Shit, Did you biuld that engine Bayliss?

Bayliss
09-04-2008, 16:27
certainly did sambo, got another one now which fingers crossed will be alright this time round

samboRT
09-04-2008, 16:29
i'll never know exactly what went wrong


Did you biuld that engine Bayliss


certainly did sambo

Thats your answer Bro :wink:

Good luck with the new un!

cliolord
09-04-2008, 18:20
Honestly I have seen some many engines which have been rebuilt blow up its silly now. These range from have cracked pistons, snapped rods, spun bearings and all sorts. its just silly. Got a picture of the conrod aswell?

richy
09-04-2008, 18:59
nice piston lol

Bayliss
09-04-2008, 20:01
Honestly I have seen some many engines which have been rebuilt blow up its silly now. These range from have cracked pistons, snapped rods, spun bearings and all sorts. its just silly. Got a picture of the conrod aswell?

i haven't but it is bent

rob-legend
14-04-2008, 21:44
when you guys up at croft?

5th of may


any chance i can pop up see you guys? nice to put some names to faces, i won't be taking the willy like, tis off the road. what time u guys there from/till?

northy
15-04-2008, 12:57
sure - make sure u pop over and say hi

MicKPM
15-04-2008, 13:09
Damn, that's not a good look at all but top effort for doing it proper!!

Has the block been scraped as I'm on the look out for a crank?

Mick

rickyquicky
16-04-2008, 16:13
whats with all the gashes at the top of the piston? it looks to me like the top of the piston has hit a valve somewhere along the line....

would it be possible for a valve to 'drop' if you know what i mean? into the cylinder and it all goes tits up!?

just a poorly educated guess!

Rich
16-04-2008, 16:58
it hit the valves when the piston snapped lol

rickyquicky
16-04-2008, 17:21
i doubt it, seeing as if you were to piece the pistom together, you will see that one of the deep scores or 'gashes' goes across both sides of where it has split, in which case the valve hit it whilst it was still intact

Rich
16-04-2008, 17:24
oh sorry i', looking at the wrong marks, the indentations are already in the pistons like that from the factory, presume needed it for a little valve clearance

Bayliss
16-04-2008, 17:24
depending on where the piston broke it has twisted slightly in the bore hence why it has extra grooves when the valves have been driven into the piston

rickyquicky
16-04-2008, 17:33
oh ok i just presumed they were smooth...that explains that then!

:oops: :D

rickyquicky
16-04-2008, 17:42
what mileage was she on?

Rich
16-04-2008, 17:44
aboutt 4k if he's lucky! rebuilt jobby

Bayliss
16-04-2008, 17:55
yeah about that, TBH the engine was a joner (or how ever u spell it) its never been right since it was in pieces

MicKPM
16-04-2008, 21:14
So is the crank okay and if so is it forsale?

Mick

Bayliss
16-04-2008, 22:09
it is ok but i'm planning on keeping it as a spare for now

Ali
17-04-2008, 09:57
Holy ****!

rickyquicky
17-04-2008, 10:35
unlucky mate, thats why i wont take mine round the track i just know its gonna go wrong!

and i'm trying to spend money on restoring my williams, rather than mending it, which seems to be all im doing at the moment, its already needed the diff rebuilt, driveshaft and exhaust and i've only had it 3 months!

what are you going to do now get another f7r engine? what about a 172/182 engine is it stronger?

Bayliss
17-04-2008, 16:39
i've got another engine, its all part of the fun with renaults, i don't think its the trackdays that destroys it, i think its just he way i drive it on a trackday

Swervin_Mervin
17-04-2008, 22:48
Difficult to see from teh vid properly but the pressure looked a little low to me. Wasn't moving much when you were accelerating.

It amazes me thoug how slow people go round Cadwell, esp. in the wet. We were lapping all sorts last time we were there in the old 1.8. Was even lapping with an Exige once the track had started drying out.