if a 3 litre v6 jumps a couple of teeth om the cam belt whats the chances of valve damage?.its ronning as rough as hell and weve checked every sensor and the coil pack and plugs and leads and everythings working as it should.and te belt jumping is all that it can be and it sounds tappy from the top end

if you know its definately jumped a couple of teeth, have you tried to refit?

depends which cam & how many teeth tbh.

havent had the covers off it yet.as weve tryed everything else this is the only thing i can think of.its saying cam sensor voltage to high.and my thinking is as its a new cam sensor and its running the belt jumpping is all i can think off cos we tried the cam sensor on my v6 calibra and that ran fine

and my mates just told me its due a belt so i think it strip it down time.if it was out whats chances of valve damage?

does it tick over very rough/wants to stall.
will it rev over 2k & sound ok?

it ticks over and sounds like a bag of nuts n bolts it will rev but very hesitantly as soon as you put it in reverse or drive and touch the throtle it dies but will move back and forwards if you dont touch the gas

is it popping from the air intake plenum on tickover?

no only when you rev it on tick over it sounds like its running on 2 cylinders

take the EGR valve off, give it a good clean inside with carb cleaner, or you could just make a blanking plate up at its base. x2 torx bolts. this may sort you out.  :y

blanked the egr valve when first got it as it was leaking

sierrapaul wrote on 16. Jan 2011 at 14:47:

blanked the egr valve when first got it as it was leaking

bugger.
:(

im all outa ideas with it.think its time to get the matches out and have bonfire nite early

mmmmm
have you had owt to bits on the inlet/plenum. check all vac connections are tight. other than that, yes check the situation of the cambelt. if valves were hitting pistons then you would have a loud knocking not a tappy sound. i did manage to save a 3.0l that went a few teeth out. :y

think il have to have the cover off and check timeing.thanks for your help

your welcome. :y

sierrapaul wrote on 16. Jan 2011 at 13:59:

if a 3 litre v6 jumps a couple of teeth om the cam belt whats the chances of valve damage?.its ronning as rough as hell and weve checked every sensor and the coil pack and plugs and leads and everythings working as it should.and te belt jumping is all that it can be and it sounds tappy from the top end

I think the consensus is that the belt has to skip 3 teeth before valves meet pistons (but don't quote me.....).

Both the Omegas I have owned have sounded a little tappety when cold so may be nothing to worry about (unless some valves are bent and have big clearances as a result).

First step has to be to take the bagpipes, auxiliary belt and cambelt cover off. Wind the engine round to TDC and check that the timing marks on the cam pulleys are aligned with the marks on the rear cambelt cover.

It is poss to bend the valves at 2 teeth belt jump and it also depends on what engine speed it jumped at, so yes you may have top end damage. :(

ffcgary1 wrote on 16. Jan 2011 at 15:33:

It is poss to bend the valves at 2 teeth belt jump and it also depends on what engine speed it jumped at, so yes you may have top end damage. :(

thought it was 3. also dependant on which way & what cam.

What's the belt history? When is it due?

Not too bad a job to check the timing marks.

Could post a video with audio....?

Have you done the paper clip test to look for any fault codes?

chrisgixer wrote on 16. Jan 2011 at 16:45:

What's the belt history? When is it due? Not too bad a job to check the timing marks. Could post a video with audio....?

Go on Chris, I'm sure there are other members who would also appreciate it.

it has jumped 3 teeth and was drivin about 10-15mph wen it went iam just hopein there is no valve damage

duaneyb1 wrote on 17. Jan 2011 at 14:59:

it has jumped 3 teeth and was drivin about 10-15mph wen it went iam just hopein there is no valve damage

There more than likely will be i'm sorry to say :'(

Elite Pete wrote on 17. Jan 2011 at 15:37:

duaneyb1 wrote on 17. Jan 2011 at 14:59: it has jumped 3 teeth and was drivin about 10-15mph wen it went iam just hopein there is no valve damage There more than likely will be i'm sorry to say :'(

Yes, if the top end has been rattling as a result the prognosis isn't good, I'm afraid.

Kevin

Generally, you get away with 2, but not 3 :(

returning to the OP, have you made sure that the cam sensor plug is actually connected to the cam sensor itself ?

"voltage too high" is signifying that the ecu is receiving maybe 12V when it's expecting 5V, which could be because it's plugged into the wrong place. Look at the wires and compare to the colours in the wiring diagram.

the omega is in a garage and all sensors have been checked and are fine. the timing belt has jumped 3 teeth the bloke at the garage is a family friend. he is gona time the old belt backup an check the compression and if valves are bent then i will have to break my baby due to the cost of putting it right which will be a great shame as the car is in extremely good condition and b4 this happend drove like a dream :( :'(

duaneyb1 wrote on 17. Jan 2011 at 18:49:

... and if valves are bent then i will have to break my baby due to the cost of putting it right  ....

If valves are bent, just replace the heads complete with second hand parts. There's always cars being broken here, & I'm sure it wouldn't be that expensive to put right.

Andy B wrote on 17. Jan 2011 at 19:48:

duaneyb1 wrote on 17. Jan 2011 at 18:49: ... and if valves are bent then i will have to break my baby due to the cost of putting it right  .... If valves are bent, just replace the heads complete with second hand parts. There's always cars being broken here, & I'm sure it wouldn't be that expensive to put right.

either that or do what i did and just replace the engine got mine for £200 as i had lost compression on 3 cylenders

hello all just an update on my v6 it has been timed back up and the compression has been checked on each cylinder and to shock you all no valves have been bent  :o so it has had a new belt and a new water pump (apparently some bearings from the water pump are what caused the belt to jump) and is running as sweet as a nut :y a big thanks to sierrapaul(my brother in law) and a big thanks to all of you here at OOF that helped :y (ps when a belt jumps 3 teeth all hope is not lost)

Great news Duaney. 8-) :y

Thanks mate its made my day

You need to put a couple of quid on the lottery tomorrow ;)

duaneyb1 wrote on 18. Jan 2011 at 17:20:

.... (apparently some bearings from the water pump are what caused the belt to jump)  .....

If your garage genuinely believes that a failed water pump bearing has caused the cam belt to jump then he doesn't know what he's doing. You should change your garage.

Or

If your garage is trying to get you to believe that a failed water pump bearing has caused your cam belt to fail, he's conning you. You should change your garage.

lottery i would say so lol

Andy B wrote on 18. Jan 2011 at 17:31:

duaneyb1 wrote on 18. Jan 2011 at 17:20: .... (apparently some bearings from the water pump are what caused the belt to jump)  ..... If your garage genuinely believes that a failed water pump bearing has caused the cam belt to jump then he doesn't know what he's doing. You should change your garage. Or If your garage is trying to get you to believe that a failed water pump bearing has caused your cam belt to fail, he's conning you. You should change your garage.

Unless the water pump failed causing the Aux belt to snap and end up in the cam belt ;)

Elite Pete wrote on 18. Jan 2011 at 17:35:

....Unless the water pump failed causing the Aux belt to snap and end up in the cam belt ;)

I know it has reputedly happened here, but it's very very unlikely, that's one of the reasons for fitting a cam belt cover. My fan belt shredded itself recently and ended up no where near the cam belt. Infact how many places are there where anything could get through to the cam belt?

all i know is the car is running cooler and my heater is working again so the water pump was knackered

yes but the point is on the V6 the cambelt does not drive the water pump.  what people are trying to say is that although the garage has apparently fixed the problem, what they are telling you is plainly wrong.  If they are prepared to tell you a bunch of lies about the problem, have they done the work correctly.

You know.. reading the first post from duaneyb1 on this page, it sounds like it was his brother who did the work.. so you're all telling him to find a new brother ;)

aaronjb wrote on 19. Jan 2011 at 09:36:

You know.. reading the first post from duaneyb1 on this page, it sounds like it was his brother who did the work.. so you're all telling him to find a new brother ;)

Not how I read it. Sierapaul & duaneyb1 are brothers-in-law and tha car is at a garge of a family friend  :y

the waterpump bearing broke up and caused the belt to jump.the waterpump caseing had a hole in it and the rollers came out the pump.and as you know or should know the waterpump sits behind the cam cover and only the pully sits on the outside of the cover.so it is poss and the garage is very good and not rip offs