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+--- Thread: Piston anyone got any ideas? (/showthread.php?tid=13764)
Piston anyone got any ideas? - Frosty - 12-05-2013
Anyone got any idea why or how this has happen on my pistons out my engine. It has happened on 3 out of the 4 pistons. It would seem like a valve has hit the piston but im not sure how its happened.
![[Image: null_zpsed5773c5.jpg]](http://s1065.photobucket.com/user/nufc4frosty/media/null_zpsed5773c5.jpg.html)
Anyone got any ideas? Also i guess i will need to change the pistons now?
Anyone got any ideas? - Jonny b - 12-05-2013
Surely That's been made like that! Your valves would be seriously f*cked if they managed to make them indents
RE: Anyone got any ideas? - Frosty - 12-05-2013
They may be meant to be like that but i duno.
RE: Piston anyone got any ideas? - Josh_Quant - 12-05-2013
looks like cambelt snapped at some point
RE: Piston anyone got any ideas? - Frosty - 12-05-2013
Thats what i fort it could be. If it had though it would of been a while ago cuz ive had the car 3 years and my mate had it for 7 years before i had it and he has never had the head off.
RE: Piston anyone got any ideas? - Toms306 - 12-05-2013
That's odd!
Surely both valves would hit the piston if the belt snapped, or if someone timed it wrong though?
RE: Piston anyone got any ideas? - Frosty - 12-05-2013
i timed the engine up before taking the head off and all timed up ok
RE: Piston anyone got any ideas? - Ruan - 12-05-2013
DEFO valves hit piston...
RE: Piston anyone got any ideas? - Toms306 - 12-05-2013
But, I was thinking if someone got it slightly wrong at a previous belt change, heard that it sounded bad and tapped like a '6, then re-timed it after...would that be the outcome? Does one valve come out further than the other?
RE: Piston anyone got any ideas? - Ruan - 12-05-2013
That's a belt snap caused that... Ive ran an XUD 3 teeth out and its fine...
RE: Piston anyone got any ideas? - Tom - 12-05-2013
Dats craaaaaaazy!
RE: Piston anyone got any ideas? - Toms306 - 12-05-2013
(12-05-2013, 09:34 PM)Ruan Wrote: That's a belt snap caused that... Ive ran an XUD 3 teeth out and its fine...
Fair enough, was just curious.
How come theres only one valve mark though? I've seem a couple of (assumed) cambelt failures without head at the scrappy and they had both valve marks.
RE: Piston anyone got any ideas? - Frosty - 12-05-2013
I need to get some other pistons then?
RE: Piston anyone got any ideas? - Jonny81191 - 12-05-2013
Ouch, that's hit quite hard there!
RE: Piston anyone got any ideas? - cully - 13-05-2013
frosty maybe you need to check the rods too!
@tom go read up on your 4 stroke cycle, both valves are only open for a very short time
one or the other valve is open for a far longer duration
RE: Piston anyone got any ideas? - Jimbo - 13-05-2013
(13-05-2013, 05:29 AM)cully Wrote: frosty maybe you need to check the rods too!
@tom go read up on your 4 stroke cycle, both valves are only open for a very short time
one or the other valve is open for a far longer duration
He's putting hdi rods in that's why it's coming apart
RE: Piston anyone got any ideas? - Frosty - 13-05-2013
So it looks like I will get some new pistons depending on price.
What would people recommend? Is there any uprated 1s?
RE: Piston anyone got any ideas? - CJ_Derv - 13-05-2013
I got a set of pistons and rods xud ones shells only done 5k along with rings in a spare block pm if interested
Piston anyone got any ideas? - Frosty - 13-05-2013
Ok mate going to look at some spare engines that I got.
Got a price for new pistons which is 91 + vat each piston
Pice for rings 80+ vat for the set
RE: Piston anyone got any ideas? - CJ_Derv - 13-05-2013
The rings and shells stand me at about 120+ but have a figuire in mind for complete set pal
RE: Piston anyone got any ideas? - Toms306 - 13-05-2013
(13-05-2013, 05:29 AM)cully Wrote: @tom go read up on your 4 stroke cycle, both valves are only open for a very short time
one or the other valve is open for a far longer duration
I'm aware of that, but I thought when the belt broke, there would still be momentum so the other valve would hit as well rather than it just stopping dead?
RE: Piston anyone got any ideas? - Ruan - 14-05-2013
Probably smashed the cam in two shortly after that happened!! Then of course the other definitely wouldnt have!!
RE: Piston anyone got any ideas? - Dicky - 14-05-2013
(14-05-2013, 03:43 PM)Ruan Wrote: Probably smashed the cam in two shortly after that happened!! Then of course the other definitely wouldnt have!!like one i bought with a f*cked engine, best snapped smashed the piston and cracked it with an indent like that and snapped the cam in 2
RE: Piston anyone got any ideas? - cully - 14-05-2013
frosty ...puglove has a complete engine for sale cheap!
RE: Piston anyone got any ideas? - Toms306 - 14-05-2013
(14-05-2013, 03:43 PM)Ruan Wrote: Probably smashed the cam in two shortly after that happened!! Then of course the other definitely wouldnt have!!
(14-05-2013, 03:46 PM)Dicky Wrote:(14-05-2013, 03:43 PM)Ruan Wrote: Probably smashed the cam in two shortly after that happened!! Then of course the other definitely wouldnt have!!like one i bought with a f*cked engine, best snapped smashed the piston and cracked it with an indent like that and snapped the cam in 2
Ah, I didn't think of that lol!
Piston anyone got any ideas? - Frosty - 14-05-2013
(14-05-2013, 04:17 PM)cully Wrote: frosty ...puglove has a complete engine for sale cheap!
I saw he did. I got some spare engines anyway but I am tempted bits it's hassle picking it up
RE: Piston anyone got any ideas? - Frosty - 14-05-2013
Before i go spending money on getting new piston rings is there any uprated pistons out there people use that aren't mega money?
RE: Piston anyone got any ideas? - cully - 14-05-2013
cast your own! bert did with his indian
