Cambelt slipping

[DannyR]

Engine had new belt etc when engine was out so was never tested, took it out for a test run once engine was back in and it seems like the belt has slipped, doing this it's bent valves no compression!

What could of caused this to happen?

 

[Christopher]

Re: Cambelt slippong

Changed the belt, but not the tensioner.

Not correct tension > Possible slipped teeth.

 

[Fred@BTM]

Re: Cambelt slippong

someone using the irish tool kit more than likley

(that's not racist, i am Irish)

 

[clio carl]

probs the pretensioner as thats what caused mine

 

[Whiteley]

probs the pretensioner as thats what caused mine

That's to do with the seatbelts, lol

 

[sideways danny]

Re: Cambelt slippong

someone using the irish tool kit more than likley

(that's not racist, i am Irish)

this

 

[clio carl]

That's to do with the seatbelts, lol

meant tensioner:rasp:

 

[Alastair.]

probs the pretensioner as thats what caused mine

pmsl

 

[DannyR]

Tensioners were changed, few people now said it probably wasn't tight. The lad who done it is a Renaul Tech and floats about on here. He's saying the fire before could of caused damage but I'm 99.9% sure it wouldn't of as all plastic parts were replaced and only the top tensioner at the back was a little egg shaped, and that was changed! Trying to find out were I stand really as it's not my fault my engine is now fucked!

 

[Greeny.]

Danny thats really f**king s**t mate

 

[Fred@BTM]

ALL the tools used? including the pulley tool?

 

[sideways danny]

Tensioners were changed, few people now said it probably wasn't tight. The lad who done it is a Renaul Tech and floats about on here. He's saying the fire before could of caused damage but I'm 99.9% sure it wouldn't of as all plastic parts were replaced and only the top tensioner at the back was a little egg shaped, and that was changed! Trying to find out were I stand really as it's not my fault my engine is now f**ked!

unfortunately for you, this is why paying cash for a private job doesn't pay off. No Warranty.

 

[DannyR]

ALL the tools used? including the pulley tool?

I don't know mate, I would imagine so as he's done loads before and they've been fine, now looking like a summer without the car

unfortunately for you, this is why paying cash for a private job doesn't pay off. No Warranty.

I didn't have much choice tbh the engine was sat out of the car so couldn't drive it anywhere.

Do you think the fire could of actually done something as I'm sure it wouldn't of!

 

[Rob]

This really sucks

I don't see how the fire could have caused it if you replaced any parts that had perished?

If it were me, I'd try and strike a deal with who ever did it rather than trying to demand a free fix, may cost you a bit, but it should get you a lot further.

At the end of the day, if it wasn't done right (even if something caused by the fire had maed it not right) then he should have told you prior to driving the car off.

 

[sideways danny]

if it's had a full cambelt kit on it, the only part left to be damaged is the cam pulley and crank pulley damper. Both the crank pulley and exhaust cam pulley have a rubber layer, could have been melted maybe?

 

[scotty2hotty81]

dam the fire them all that work now this! forged rebuild!

 

[DannyR]

All I need is rods for my spare engine to be complete! I just can't afford it

 

[Timmay]

Re: Cambelt slippong

someone using the irish tool kit more than likley

(that's not racist, i am Irish)

def not - he knows his stuff

 

[DannyR]

My old engine done the same tim and was done by a respected specialist! It's currently being looked at and will have a verdict tomorrow what caused it. Tensioner being lose is looking best bet at the moment!

 

[sideways danny]

wonder if it's related to the supercharger? Could easily put shock loading on the pulley, and they do take a lot more power than an AC compressor

Might be worth adding a woodruff key to the crank, the slots are already there

 

[K-Tec Racing]

on an sc engine i would replace the bolt with a new one

 

[DannyR]

Which bolt would you replace? There is less load on the aux belt now as no PAS pump. Adjustment is now an alternator bracket. Could aux belt be too tight?

 

[DannyR]

Engine has been looked at today and bottom pulley was loose. 8 Valves have been bent, all pistons dented and one has been cracked

if anyone wants to donate some forged rods I can then put my forged pistons in. Not heard anything from the lad that done it either ....

 

[Russ_16v]

s**t mate so was it the fault of the fitter, or has it worked loose for some reason?

 

[DannyR]

I'd imagine to be his fault, wasn't ran for long or hard at all so wouldn't of thought would of worked loose, had been on there 10k with the charger before he'd taken it off! Still no reply from him!

 

[dohertsport182]

what a pr*ck, i feel for you m8 its bad enough spending money on parts and such, this kinda sh*t just holds you back.

 

[Russ_16v]

I'd imagine to be his fault, wasn't ran for long or hard at all so wouldn't of thought would of worked loose, had been on there 10k with the charger before he'd taken it off! Still no reply from him!

No word yet?

 

[DannyR]

No, strange that lol!

 

[delcbr]

i done the tutorial on here and i would say sounds like the mechanic fooked up.thats why i think its better to leave them pulley bolts alone unless the dephaser pulley needs to be changed as imo itsd not worth the risk of it coming loose and destroying your engine.french engineering at its best iam afraid i just cant understand why theres key ways on the cam and crankshafts but decide not to manufacture keys for them its like they 2 teams designed different parts of the engines!!!!!!!!!!!!!!!!!!!!!!

my bros xsara vts 167 bhp all you need to do the timing belt is pins. 2 go through the cam pulleys into the engine block and 1 for the crankshaft whats so hard about that!!!!!!!

anyhow mate i feel for ya hope the guy who was working on your car admits liability and learns from his mistake.

 

[Fred@BTM]

^IMO you must back everything off to time it up correctly

there's no keyways on the cam pulleys

 

[delcbr]

was it you Fred?

 

[Fred@BTM]

was it f**k, i'm not a r****d

 

[RSTuning]

on an sc engine i would replace the bolt with a new one

Exactly this, i found out the hard way, twice! You have to do the bottom pulley to spec or it will slip at about 6000rpm bending the exhaust valves

 

[DannyR]

That's exactly what happened!

 

[Fred@BTM]

why would you not do it to spec though? 40nm + 110deg +/- 15deg from memory

it IS a strech bolt too contary to what some people think, it says so in the sodding renault book!

I always change the crank bolt when doing a cambelt

 

[sideways danny]

why would you not do it to spec though? 40nm + 110deg +/- 15deg from memory

it IS a strech bolt too contary to what some people think, it says so in the sodding renault book!

I always change the crank bolt when doing a cambelt

2 different specs, (as there is on the DCI also....same bolt) I use 20Nm +135deg.

Bolt IS a stretch bolt, with a length limit (in the manual). I carry 4 new ones

 

[f0xy]

20Nm + 115deg +/- 15deg

Edit - beat to it.

 

[stu-172]

All I need is rods for my spare engine to be complete! I just can't afford it

I'll check at home 2nite as I'm near sure I've a set of rods/pistons in the garage. I'll sell you them cheap cheap!

 

[Gray]

I think he means fordged rods

 

[Fred@BTM]

20Nm + 115deg +/- 15deg

Edit - beat to it.

just checked my book, and this is as stated in the renault manual