For years I have known of a small oil leak from the oil cooler ( or more correctly , the oil -coolant heat exchanger ) which is bolted to the oil filter housing.
I have monitored it and wiped the oil away regularly.
After a recent 1000 km drive I found the underside of the cooler was wet with oil so I decided to finally fix it.
Most say to replace the seals you should remove the oil filter housing and replace the large seal under that at the same time , however I think mine is not leaking so I did not remove the oil filter housing.
Neither did I remove the cooler coolant lines.
1. Remove the oil filter cap etc. cover with a clean rag so nothing falls in.
2. Remove the three T30 torx bolts from the air injection pump and push it away as far as possible to enable access to the oil cooler rear lower bolt.
3. Cover the serp belt with plastic and spray brake cleaner between the cooler and the housing to clean the area.
4. Remove the four T30 torx bolts holding the cooler in place.
5. Move the cooler away from the filter housing as much as possible ,,there is just enough room to do the job without disconnecting coolant lines and removing the cooler , remove the old seals and clean the face of the cooler with a clean rag.
6. Place the new seals into their grooves.
7. Refit the cooler into position and tighten the bolts evenly and gradually to 9 Nm with a torque wrench ..or to 10 Nm for the M112.
I applied some medium blue threadlocker.
A T30 torx screwdriver is handy , but using a small ratchet wrench and a T30 bit is the way to do the rear lower bolt and for use with the torque wrench and initial loosening of the bolts.
8 . Refit the air pump unit and the oil filter unit.
Start her up and check for leaks ,,but she should be clean and dry .
Not removing the oil filter housing , and the cooler from the coolant lines makes this job easier and faster.
If you wish to do the oil filter housing seal at the same time , it will allow better cleaning of the parts , you do need a 46mm socket to undo the nut at the bottom of the oil filter housing , the seal or gasket , and you need to torque the nut up to 70 Nm.
I have monitored it and wiped the oil away regularly.
After a recent 1000 km drive I found the underside of the cooler was wet with oil so I decided to finally fix it.
Most say to replace the seals you should remove the oil filter housing and replace the large seal under that at the same time , however I think mine is not leaking so I did not remove the oil filter housing.
Neither did I remove the cooler coolant lines.
1. Remove the oil filter cap etc. cover with a clean rag so nothing falls in.
2. Remove the three T30 torx bolts from the air injection pump and push it away as far as possible to enable access to the oil cooler rear lower bolt.
3. Cover the serp belt with plastic and spray brake cleaner between the cooler and the housing to clean the area.
4. Remove the four T30 torx bolts holding the cooler in place.
5. Move the cooler away from the filter housing as much as possible ,,there is just enough room to do the job without disconnecting coolant lines and removing the cooler , remove the old seals and clean the face of the cooler with a clean rag.
6. Place the new seals into their grooves.
7. Refit the cooler into position and tighten the bolts evenly and gradually to 9 Nm with a torque wrench ..or to 10 Nm for the M112.
I applied some medium blue threadlocker.
A T30 torx screwdriver is handy , but using a small ratchet wrench and a T30 bit is the way to do the rear lower bolt and for use with the torque wrench and initial loosening of the bolts.
8 . Refit the air pump unit and the oil filter unit.
Start her up and check for leaks ,,but she should be clean and dry .
Not removing the oil filter housing , and the cooler from the coolant lines makes this job easier and faster.
If you wish to do the oil filter housing seal at the same time , it will allow better cleaning of the parts , you do need a 46mm socket to undo the nut at the bottom of the oil filter housing , the seal or gasket , and you need to torque the nut up to 70 Nm.
