Thread: Cleaning Prior to Installing New Oil Cooler Has Created Major Issues

The sensor short to battery is likely to be no earth for the sensor.

There isn't a connector in the harness to the MAP sensor as it's a direct connection to the ECM.

Can I ask since I’m doing this soon when you did the clean up? Did you try to wash it out or blast degreaser before disassembly or after disassembly? I was thinking prior with a very careful hose out to clean the valley as much as possible.

Maybe ragging it out is the way to go.

Perhaps the intake connection is not correct and you have a vacuum leak. I’ve got new o rings for all the manifold connections.

How do you know it’s related? Did you clean and then start it to confirm the issue or did you clean, disassemble, reassemble then experience the issue, conflating the two scenarios?

Originally Posted by PerthDisco

Can I ask since I’m doing this soon when you did the clean up? Did you try to wash it out or blast degreaser before disassembly or after disassembly? I was thinking prior with a very careful hose out to clean the valley as much as possible.

Maybe ragging it out is the way to go.

Perhaps the intake connection is not correct and you have a vacuum leak. I’ve got new o rings for all the manifold connections.

Prior to disassembly I sprayed the engine valley area with degreaser and used an air pistol to distribute and disperse, I had been warned to not apply water in this area. After removal of the components to gain access to remove the cooler I blocked off all penetrations. Removed the cooler and blocked off the penetrations exposed, blew the majority of oil and coolant out the back of the valley, mopping up the residual.

Final light spray with degreaser and blow down to disperse.

I think your on the right track to rag out all liquids.

Originally Posted by DiscoJeffster

How do you know it’s related? Did you clean and then start it to confirm the issue or did you clean, disassemble, reassemble then experience the issue, conflating the two scenarios?

Vehicle was running normally other than oil leak prior to commencing. After cleaning, disassembly and further cleaning plus reassembly I started the engine to apply the recommended process to refill the coolant. I also did an oil and filter change. Dash displayed engine fault icons and "Reduced Performance".

My OB2 reader is in the post, a good friend lent me his VDO reader and this enabled me to identify the DFCs.

I have yet to establish if I have a unserviceable sensor or just a contaminated connector.

Process to rectify is on going and will not be concluded until I have my reader in my hot hands.

I have a persistent oil weep from the top of the engine. Invisible if looking from the top.

Looking from underneath It drips down at back of the engine over the drivers side of the transmission and down the pipes to the fuel cooler ending in a drip from the bottom of the bellhousing over the sway bar. It’s been there for ages and only a weep so I’m hoping the oil cooler will be a likely culprit.

That or rocker cover

Originally Posted by PerthDisco

I have a persistent oil weep from the top of the engine. Invisible if looking from the top.

Looking from underneath It drips down at back of the engine over the drivers side of the transmission and down the pipes to the fuel cooler ending in a drip from the bottom of the bellhousing over the sway bar. It’s been there for ages and only a weep so I’m hoping the oil cooler will be a likely culprit.

That or rocker cover

I would say you are on track considering that your oil cooler is leaking. The seals in these things set like concrete and no longer seal. Dont leave it too late the next scenario is you will have oil in your coolant.

Hi all, is there an accepted mileage that we should be changing oil cooler as part of preventative maintenance? Or is it just wait until we find a leak?

Good luck with your fault finding efforts Gravy, hopefully you reach a solution soon. 👍