Oil Cooler Bypass?

[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?

[klarzy]

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]

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]

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

[Ched]

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

[SD1too]

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]

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]

DMGRS sell a replacement if it's rectangular one.
https://www.dmgrs.co.uk/products/75-zt-kv6-engine-oil-cooler-kv6-pbc000031?_pos=2&_sid=2a7a1ab1d&_ss=r

[stocktake]

DMGRS sell a replacement if it's rectangular one.
https://www.dmgrs.co.uk/products/75-zt-kv6-engine-oil-cooler-kv6-pbc000031?_pos=2&_sid=2a7a1ab1d&_ss=r
Wrong type, the OP wants the early cast aluminium one.

[trikey]

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.



SimonOr buy the car and fix the issue!!!

Sent from my SM-G780G using Tapatalk

[SD1too]

The PBC101350 cooler on it is shot mixing oil and water, or is there a service kit for it, if servicing is possible.

... the OP wants the early cast aluminium one.
Hi Alan,

Someone dismantled the original longitudinal oil cooler and found, if my memory serves me well, that it can be repaired with replacement 'O' rings.

So yes, servicing is possible.

Simon

[Oddjobber_the_1st]

Thank you Simon, I might give it a go if I can get someone to take it off for me, wish me luck.
Regards, Alan

[stocktake]

Hi Alan,

Someone dismantled the original longitudinal oil cooler and found, if my memory serves me well, that it can be repaired with replacement 'O' rings.

So yes, servicing is possible.

Simon

https://the75andztclub.co.uk/forum/showpost.php?p=2973495&postcount=6

[Oddjobber_the_1st]

Thank you for that, the pictures will definitely be extremely helpful, I will definitely give it a go.
Regards, Alan

[SD1too]

https://the75andztclub.co.uk/forum/showpost.php?p=2973495&postcount=6

Thanks Dave! :D :D :D

Simon