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[Bojan]

Just a quick and simple question: does an auxiliary electric water pump (the one below expansion tank) have any effect on engine cooling?
But I need a 100% definite answer.

From what I know, it only serves to keep the heating on when engine turned of (by circulating water trough cabin heater).
I am planing to remove it – I really never need the cabin heating feature, and the hoses towards the pump are cut in several places (as it was LPG fitted), but want to be 100% sure it will not affect engine cooling capacity in any way.

Also, I would remove two hoses (one from colant bridge to pump, and other from pump to heater matrix) -> is there an OEM hose that goes from coolant bridge directly to heater core (bulkhead)?

Following the link below -> I will remove items 4 and 5, and replace them with item no.3

http://www.partsbase.org/opel/omega-b-1994-2003-6--7-13-1-hoses-and-pipes-contd-x25xe-l80-y26se-ly9-x30xe-l81-y32se-la3-engines/

[Kevin Wood]

No. It's there purely to make use of residual heat in the engine for heating the cabin when the engine's stopped.

I removed mine when I LPG converted it with no ill effects. You can buy the hose assembly from a car without the pump to do a neater job of removal. If you look in the LPG guides here, you might find the part number.

[baggers]

WTF that link just redirected to a shagging site.

[Kevin Wood]

WTF that link just redirected to a shagging site.

Worked OK for me. 

[EMD]

WTF that link just redirected to a shagging site.

 

[VXL V6]

Non-aux pump coolant pipe 9129564

[baggers]

WTF that link just redirected to a shagging site.

Worked OK for me. 

You missed the eye full I had 

[sjc]

Do you have air-con (and therefore a heater-bypass valve)?  The diagram in your link is for models without air-con and the plumbing is subtly different.

The hose you want is the one used for models with cruise control - they didn't have the aux pump.

What model, year and engine do you have?  (if you add this to your profile, it'll save you being asked this every time)

[biggriffin]

WTF that link just redirected to a shagging site.

You must have gone to your history by mistake

[sjc]

Assuming V6, the hose you want to bypass the aux pump is..

With air-con...
 9129566  18 18 134 HOSE, HEATER, WATER INLET, HEATER VALVE, RHD (FOR AUTO CRUISE CONTROL) X25XE, X30XE  (C) X1104259-   

Without air-con (as already mentioned by VXL V6)...
 9129564  18 18 122 HOSE, HEATER, WATER INLET, RHD (FOR AUTO CRUISE CONTROL) (IDENT GQ) X25XE, X30XE  (C) X1080658-    1

[biggriffin]

Just a quick and simple question: does an auxiliary electric water pump (the one below expansion tank) have any effect on engine cooling?
But I need a 100% definite answer.

From what I know, it only serves to keep the heating on when engine turned of (by circulating water trough cabin heater).
I am planing to remove it – I really never need the cabin heating feature, and the hoses towards the pump are cut in several places (as it was LPG fitted), but want to be 100% sure it will not affect engine cooling capacity in any way.

Also, I would remove two hoses (one from colant bridge to pump, and other from pump to heater matrix) -> is there an OEM hose that goes from coolant bridge directly to heater core (bulkhead)?

Following the link below -> I will remove items 4 and 5, and replace them with item no.3

http://www.partsbase.org/opel/omega-b-1994-2003-6--7-13-1-hoses-and-pipes-contd-x25xe-l80-y26se-ly9-x30xe-l81-y32se-la3-engines/

That link is corrupted.........o Er missus

[Andy H]

Assuming V6, the hose you want to bypass the aux pump is..

With air-con...
 9129566  18 18 134 HOSE, HEATER, WATER INLET, HEATER VALVE, RHD (FOR AUTO CRUISE CONTROL) X25XE, X30XE  (C) X1104259-   

Without air-con (as already mentioned by VXL V6)...
 9129564  18 18 122 HOSE, HEATER, WATER INLET, RHD (FOR AUTO CRUISE CONTROL) (IDENT GQ) X25XE, X30XE  (C) X1080658-    1

It is 25 years since I went on holiday in Croatia but I am pretty certain that Bojan will have his steering wheel on the left (LHD) not RHD

[sjc]

Assuming V6, the hose you want to bypass the aux pump is..

With air-con...
 9129566  18 18 134 HOSE, HEATER, WATER INLET, HEATER VALVE, RHD (FOR AUTO CRUISE CONTROL) X25XE, X30XE  (C) X1104259-   

Without air-con (as already mentioned by VXL V6)...
 9129564  18 18 122 HOSE, HEATER, WATER INLET, RHD (FOR AUTO CRUISE CONTROL) (IDENT GQ) X25XE, X30XE  (C) X1080658-    1

It is 25 years since I went on holiday in Croatia but I am pretty certain that Bojan will have his steering wheel on the left (LHD) not RHD

Same parts for LHD/RHD..

With air-con...
 9129566 18 18 134 HOSE, HEATER, WATER INLET, HEATER VALVE, LHD       1   
    Note: EXC.FINLAND,NORWAY,SWEDEN   

 9129566  18 18 134 HOSE, HEATER, WATER INLET, HEATER VALVE, RHD (FOR AUTO CRUISE CONTROL) X25XE, X30XE  (C) X1104259-    1

Without air-con...
 (90466592)  (18 18 400) HOSE, HEATER, WATER INLET, LHD (NLS.- USE 9129564 18 18 122) X25XE, X30XE  (C) R1000001-  S1100328  1   
    Note: EXC.FINLAND,NORWAY,SWEDEN

 (90466592)  (18 18 400) HOSE, HEATER, WATER INLET, RHD (FOR AUTO CRUISE CONTROL) (NLS.- USE 9129564 18 18 122) X25XE, X30XE  (C)   -X1080657  1   
    Note: EXC.FINLAND,NORWAY,SWEDEN

  9129564  18 18 122 HOSE, HEATER, WATER INLET, RHD (FOR AUTO CRUISE CONTROL) (IDENT GQ) X25XE, X30XE  (C) X1080658-    1

  9129564  18 18 122 HOSE, HEATER, WATER INLET, LHD (EXC.FINLAND, NORWAY, SWEDEN) X25XE, X30XE  (C) X1080658-    1   
    Note: EXC.AIR CONDITIONING

[Kevin Wood]

Just a quick and simple question: does an auxiliary electric water pump (the one below expansion tank) have any effect on engine cooling?
But I need a 100% definite answer.

From what I know, it only serves to keep the heating on when engine turned of (by circulating water trough cabin heater).
I am planing to remove it – I really never need the cabin heating feature, and the hoses towards the pump are cut in several places (as it was LPG fitted), but want to be 100% sure it will not affect engine cooling capacity in any way.

Also, I would remove two hoses (one from colant bridge to pump, and other from pump to heater matrix) -> is there an OEM hose that goes from coolant bridge directly to heater core (bulkhead)?

Following the link below -> I will remove items 4 and 5, and replace them with item no.3

http://www.partsbase.org/opel/omega-b-1994-2003-6--7-13-1-hoses-and-pipes-contd-x25xe-l80-y26se-ly9-x30xe-l81-y32se-la3-engines/

That link is corrupted.........o Er missus

Feeling left out now.

[baggers]

WTF that link just redirected to a shagging site.

You must have gone to your history by mistake