V70 Steering: - Power steering pump, pulley size

isettaman · May 7th, 2024, 09:55

Hi All
Can someone tell me whether the pulley size on my power steering pump is crucial? Currently I have a 142mm one but I understand there are some 130mm ones about. Will it just mean that the tensioner takes up the slack in the drive belt?

VOLVOBOY · May 7th, 2024, 12:17

Yes , you are right about the tension pulley but just be aware that the non OE belts can vary in length as well , by about 20mm i seem to remember .

stuart bowes · May 7th, 2024, 13:06

Obviously the change of diameter will also affect how fast the pump spins, whether or not that amount of change has any effect as such I have no idea

is it not possible to find one that matches the size you have / or what was the purpose for changing it

isettaman · May 7th, 2024, 13:15

Quote:

Originally Posted by stuart bowes

Obviously the change of diameter will also affect how fast the pump spins, whether or not that amount of change has any effect as such I have no idea

is it not possible to find one that matches the size you have / or what was the purpose for changing it

The pump has failed so requires replacement. I suppose it's not a major job to swop the pulleys over if required. I have, rightly or wrongly, gone for a s/hand one and wasn't aware of the pulley difference until after ordering it.

stuart bowes · May 7th, 2024, 13:18

ah ok so the replacement is a whole new (different) pump with that smaller pulley already fitted?

if that's the case perhaps we can assume the size is right for that pump

as opposed to putting a smaller pulley on to your existing pump for some other reason

VOLVOBOY · May 7th, 2024, 15:38

If the auxillary belt is in good order and you are not replacing it then you should be OK seeing as the "new" pulley is smaller .

May 7th, 2024, 09:55	#1
isettaman Junior Member Last Online: Yesterday 23:23 Join Date: Apr 2017 Location: Wakefield	Power steering pump, pulley size Hi All Can someone tell me whether the pulley size on my power steering pump is crucial? Currently I have a 142mm one but I understand there are some 130mm ones about. Will it just mean that the tensioner takes up the slack in the drive belt? __________________ 2002 V70 LPG conversion 1968 Austin A60 Countryman 2000 Triumph Golden Jubilee 1976 Triumph T140V Bonneville Project Wurlitzer 2150 Juke Box

May 7th, 2024, 12:17	#2
VOLVOBOY Lazy Member Last Online: Yesterday 17:03 Join Date: Mar 2007 Location: HORLEY	Hi Yes , you are right about the tension pulley but just be aware that the non OE belts can vary in length as well , by about 20mm i seem to remember .

May 7th, 2024, 13:06	#3
stuart bowes trying to be helpful Last Online: Today 01:27 Join Date: Aug 2020 Location: Dagenham	Obviously the change of diameter will also affect how fast the pump spins, whether or not that amount of change has any effect as such I have no idea is it not possible to find one that matches the size you have / or what was the purpose for changing it __________________ V70 '01 auto petrol 2.4 (140) 70k ------------------------- mini project - link

May 7th, 2024, 13:18	#5
stuart bowes trying to be helpful Last Online: Today 01:27 Join Date: Aug 2020 Location: Dagenham	ah ok so the replacement is a whole new (different) pump with that smaller pulley already fitted? if that's the case perhaps we can assume the size is right for that pump as opposed to putting a smaller pulley on to your existing pump for some other reason __________________ V70 '01 auto petrol 2.4 (140) 70k ------------------------- mini project - link Last edited by stuart bowes; May 7th, 2024 at 13:24.

May 7th, 2024, 15:38	#6
VOLVOBOY Lazy Member Last Online: Yesterday 17:03 Join Date: Mar 2007 Location: HORLEY	If the auxillary belt is in good order and you are not replacing it then you should be OK seeing as the "new" pulley is smaller .

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