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dephaser

R

riffz1

Car  bmw 328i & 172 PH2
hello everyone, im new this and renaults in general, just bought myself a 172 yesterday.

been doin a bit of reasearch on these engines etc...

these dephaser pulleys do they have a expected lifetime or change intervals and how can you check it is functioning correctly ?
 
Welcome to the forum matey
just had mine done with the cam belt, basically they should run for at least two belt changes, but if your engine sounds like a taxi idealing then it prob needs changing, typically you will find that it sounds very tappy, and you might have a erratic ideal. ill be uploading a video of what a fooked one sounds like soon.
cost about 180 on top of a belt change.
its dirty oil that kills them, so regular oil changes are a must

Beaten to the vid's lol
 
ooo im gona check the sound of mine tomorrow after seeing that vid, but i might change it when i change my timing belt soon...
i am a mechanic myself but ive not come across one of these types of vvt yet, ive come across bmw vanos and honda vtec.
but this is pretty much the same principal as every other system.
 
Done plenty of renaults , same principal , got the locking tools at work ... Just haven't done one with a dephaser yet
 
Only way to check if they are really is sound, how long they last depends on the life that they have had in the first place (rpm etc)

Easy enough to change if you are competent at doing belts.
 
no noise at all, was just curious to see if they had an expected lifetime but defo next month when i can and its not busy at work i will get round to it, changing the timing belt.

might aswell do the dephaser while im there to save problems later on
 
riffz1 said:
no noise at all, was just curious to see if they had an expected lifetime but defo next month when i can and its not busy at work i will get round to it, changing the timing belt.

might aswell do the dephaser while im there to save problems later on
Click to expand...

Makes sense if keeping a long time. You are highly unlikely to ever need to do it again unless you do 100k miles using not great oil.
 
If your handy with the spanners i wouldn't worry a jot about the dephaser. Just replace it when it needs doing.


The mass hysteria with the dephaser is all down to the cost of a cambelt changing.
 
Andyman said:
If your handy with the spanners i wouldn't worry a jot about the dephaser. Just replace it when it needs doing.


The mass hysteria with the dephaser is all down to the cost of a cambelt changing.
Click to expand...

Agreed, I didnt bother putting a new one on my turbo despite all the money I spent building the engine, didnt see any point in replacing one that is fine anyway, will just do it if it ever needs doing in future.

would be a different story if I was paying a few hundred quid labour though I guess!
 
Chip-mk1 said:
Agreed, I didnt bother putting a new one on my turbo despite all the money I spent building the engine, didnt see any point in replacing one that is fine anyway, will just do it if it ever needs doing in future.

would be a different story if I was paying a few hundred quid labour though I guess!
Click to expand...

true since labour isn't a problem for me, and the dephaser is working thinking I could just change the belt I suppose
 
Ade182 said:
I'm 95% sure its dephaser then, which means new cambelt & aux belt kits unfortunately! It's expensive yes but you are guaranteed piece of mind after the work is done!
Click to expand...

No worries then as my belts are due in a few months anyway :)
The dephaser is part of the cam kit I assume, yeah?
 
just reading this....so if you have just had both belt kits done why would you need both new kits again if the dephaser needs done later on
 
scotty10 said:
just reading this....so if you have just had both belt kits done why would you need both new kits again if the dephaser needs done later on
Click to expand...

Because no one is likely to remove and refit a secondhand cambelt realistically, especially given that the tensioners never want to sit quite right the second time they are tensioned so its difficult to have confidence the tension is set correctly (although thats just the cambelt, I would happily re-use an aux belt if it was nearly new TBH)
 
Makes me wish I got mine done now after forking out a wedge of my wages on the belts

Another question can the MPG change after belt changes
 
scotty10 said:
just reading this....so if you have just had both belt kits done why would you need both new kits again if the dephaser needs done later on
Click to expand...

you wouldn't. If both full kits are new (less than 6 months/6k) then just 2 new belts and a couple of blanking plugs are all you'd need.
 
People help !!! Change cam belts kit and aux kit + water pump few weeks ago but not change dephaser pulley . Now engine when heat ticking . Tomorrow add a video to youtube.com with engine sound to diagnose . Sorry for my english if you don`t understand .... CS Member waal ;) Cheers
 
Take it back to the garage and ask them? Read this thread and you have all the answers of what to do if it is the dephaser that needs changing. Good luck.
 
waal said:
People help !!! Change cam belts kit and aux kit + water pump few weeks ago but not change dephaser pulley . Now engine when heat ticking . Tomorrow add a video to youtube.com with engine sound to diagnose . Sorry for my english if you don`t understand .... CS Member waal ;) Cheers
Click to expand...


Probably more related to the new belts than being the dephaser.

If its a dephaser you would really know about it, proper heavy rattling
 
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