Oil Cooler Bypass?

Qubit · 13th May 2014, 18:22

How necessary is the oil cooler on the 2.5 V6 engine? Im considering a ZT that seems to have had the oil cooler bypassed according to the owner, but dont know how much of a potential issue it would be?

klarzy · 13th May 2014, 18:31

Quote:

Originally Posted by Qubit

How necessary is the oil cooler on the 2.5 V6 engine? Im considering a ZT that seems to have had the oil cooler bypassed according to the owner, but dont know how much of a potential issue it would be?

If you view the engine as a heat storage unit then the oil being hotter will mean less heat energy taken out of the system, which means the water coolant system would have to work harder to compensate.

with both the water and oil hotter the pressure in those systems would increase and you would be more prone to overheating, hgf and water pump issues.

I am not well versed with that engine but in general that is what I would see occurring.

MF1980 · 13th May 2014, 19:00

Have a look and see what engines run without a cooler as standard..
i have bypassed the cooler down to issues with coolant flow.
The oil will only ever reach a peak temperature. The hotter the oil, the thinner it gets so recommend fresh 10w40. Having said that, I've not done an oil change yet..
The airflow over the alloy sump itself has a cooling effect, to a degree.
Yes, its there for a reason, But running without it for a short time shouldn't be an issue in my view.
I have considered changing it to an oil/air cooler..

Qubit · 13th May 2014, 21:57

Many thanks for the replies. Looks like it might not really be worth it.

Ched · 13th May 2014, 22:07

Has he bypassed it because it was leaking coolant into the oil?

SD1too · 13th May 2014, 22:12

Quote:

Originally Posted by Qubit

Im considering a ZT that seems to have had the oil cooler bypassed according to the owner ..

Keep looking for a better car Tim!

The cooler will have been by-passed because the owner doesn't want to repair a fault. There may be other similar problems which you haven't discovered.

Simon

Oddjobber_the_1st · 29th November 2023, 13:56

Hi, I see an air cooled oil cooler is mentioned, does anyone know if there is one that is compatible with my 190+. The PBC101350 cooler on it is shot mixing oil and water, or is there a service kit for it, if servicing is possible.
Regards, Alan

Geoff130 · 29th November 2023, 14:14

DMGRS sell a replacement if it's rectangular one.
https://www.dmgrs.co.uk/products/75-...a7a1ab1d&_ss=r

stocktake · 29th November 2023, 14:22

Quote:

Originally Posted by Geoff130

DMGRS sell a replacement if it's rectangular one.
https://www.dmgrs.co.uk/products/75-...a7a1ab1d&_ss=r

Wrong type, the OP wants the early cast aluminium one.

trikey · 29th November 2023, 16:59

Quote:

Originally Posted by SD1too

Keep looking for a better car Tim!

The cooler will have been by-passed because the owner doesn't want to repair a fault. There may be other similar problems which you haven't discovered.

Simon

Or buy the car and fix the issue!!!

Sent from my SM-G780G using Tapatalk

13th May 2014, 18:22	#1
Qubit Regular poster None at the moment Join Date: Nov 2013 Location: Cambridge Posts: 43 Thanks: 1 Thanked 4 Times in 3 Posts	Oil Cooler Bypass? How necessary is the oil cooler on the 2.5 V6 engine? Im considering a ZT that seems to have had the oil cooler bypassed according to the owner, but dont know how much of a potential issue it would be?

29th November 2023, 13:56	#7
Oddjobber_the_1st Newbie Mg ZT-T Join Date: Apr 2023 Location: Helhoughton Posts: 28 Thanks: 0 Thanked 0 Times in 0 Posts	Oil cooler for my MG ZT-T 190+ 2001 2.5L V6 Hi, I see an air cooled oil cooler is mentioned, does anyone know if there is one that is compatible with my 190+. The PBC101350 cooler on it is shot mixing oil and water, or is there a service kit for it, if servicing is possible. Regards, Alan

13th May 2014, 19:00	#3
MF1980 Loves to post MG ZT190+ No.5863 Join Date: Dec 2013 Location: Swindon Posts: 321 Thanks: 52 Thanked 36 Times in 31 Posts	Have a look and see what engines run without a cooler as standard.. i have bypassed the cooler down to issues with coolant flow. The oil will only ever reach a peak temperature. The hotter the oil, the thinner it gets so recommend fresh 10w40. Having said that, I've not done an oil change yet.. The airflow over the alloy sump itself has a cooling effect, to a degree. Yes, its there for a reason, But running without it for a short time shouldn't be an issue in my view. I have considered changing it to an oil/air cooler..

13th May 2014, 21:57	#4
Qubit Regular poster None at the moment Join Date: Nov 2013 Location: Cambridge Posts: 43 Thanks: 1 Thanked 4 Times in 3 Posts	Many thanks for the replies. Looks like it might not really be worth it.

13th May 2014, 22:07	#5
Ched I really should get out more....... MG ZT V8, MGZT 135 derv ,MG TF 135 Join Date: Dec 2011 Location: Romsey Posts: 2,307 Thanks: 553 Thanked 573 Times in 385 Posts	Has he bypassed it because it was leaking coolant into the oil?

29th November 2023, 14:14	#8
Geoff130 Loves to post MG ZT 190, Rover 75 CDTi, Honda VFR 750, Honda CB550F Join Date: Aug 2010 Location: Derby Posts: 394 Thanks: 75 Thanked 36 Times in 28 Posts	DMGRS sell a replacement if it's rectangular one. https://www.dmgrs.co.uk/products/75-...a7a1ab1d&_ss=r