dephaser pulley

[jonnyse7en]

can anyone tell me what the dephaser pully is and what does it do , and why could it make my 172 sound like a diesel on tickover when warm.

 

[123stevevw]

its the camshaft pulley, pretty sure its oil filled and acts in a similar way to a torque convertor (on auto boxes), basically its related to the VVT and they can wear/break up after a while and cause the rattle, cambelt off jobbie I'm afraid

Try looking on www.howstuffworks.com! maybe some info on there

 

[DAMO 40/172]

dont know what it does but mine was fucked and had that lovely diesel sound and would stall a lot a low idle. cost about £100 for the part, i had mine swapped when i did cam belt.

 

[BioHzrd]

Somin to do with Oil Pressure or somin i was told when i had to get mine done...

 

[msisleman]

Dephaser pulley is the oil filled inlet cam pulley. It controls the VVT (variable valve timing) and means the inlet pulley can become out of phase with the other pulleys by a number of degrees, controlled by the ECU. This then increases or decreases valve overlap duration etc, mainly for EGR (exhaust gas recirculation) and emissions purposes afaik.

But as to why it may fail or be noisy, I would imagine something to do with being starved of oil or something, but not sure. Sorry! At least you know what its for though

 

[123stevevw]

Told you /\ /\ /\

(well sort of!)

 

[BioHzrd]

Timing belt should be done to BTW !