Thread: 2.7L Oil Pump Failures

Originally Posted by PerthDisco

Pre MY09 is no good - change oil pump housing at belt change
MY09 onward is ok
Tighten tensioner to specific torques only

that is what killed my engine, it now has a transplanted Territory 2.7 so would hope it has the upgraded housing.

Having just done my belts @195k they looked good with no visible sign of age degradation, pity the oil pump didn't fair so well. Tensioner broke off 2 months ago but luckily I was stationary in my drive when it went, 1 slightly bent camshaft and a couple of broken cam cap bolts was the only damage. Tore it down for a full inspection examining each component.
Gave the intakes a thorough clean at the same time.

You were extremely lucky there loanrangie.

If the belt was in good condition it would suggest the timing belt had been changed at some point but not the oil pump.

If the belt was original then that is amazing.

Just shows, if you don’t know if the oil pump has been upgraded, get it done ASAP.

Originally Posted by PeterOZ

that is what killed my engine, it now has a transplanted Territory 2.7 so would hope it has the upgraded housing.

Yea they are all post 09 engines I believe.

Originally Posted by loanrangie

Having just done my belts @195k they looked good with no visible sign of age degradation, pity the oil pump didn't fair so well. Tensioner broke off 2 months ago but luckily I was stationary in my drive when it went, 1 slightly bent camshaft and a couple of broken cam cap bolts was the only damage. Tore it down for a full inspection examining each component.
Gave the intakes a thorough clean at the same time.

So this was a pre 09 car on its second or first belt? The tensioner’s normal fail mode pre 09 was after a belt change. I think the tensioner bolt torque is 26NM so very likely it was over cranked on many occasions stressing the old oil pump housing casting where it bolts into. The new housing has more metal and gusseting in the casting around the tensioner bolt hole.

Obviously a new oil pump was part of your rebuild?

Definitely a miraculous escape.

Originally Posted by PerthDisco

So this was a pre 09 car on its second or first belt? The tensioner’s normal fail mode pre 09 was after a belt change. I think the tensioner bolt torque is 26NM so very likely it was over cranked on many occasions stressing the old oil pump housing casting where it bolts into. The new housing has more metal and gusseting in the casting around the tensioner bolt hole.

Obviously a new oil pump was part of your rebuild?

Definitely a miraculous escape.

Yes 07 build MY08, i was under the impression the belts hadn't been changed by my talks with the 1 previous owner but reading the date markings on the belt it seems the belt was dated after my car was built but same year.
Yes i had the new pump already so i mocked it all up with the old belt so i could determine how far out the timing was and if it would rotate correctly, the cam i replaced was the LH exhaust which was an effort in itself because of the rear pulley and belt cover.
i was very lucky and got away with just $250 worth of parts not inc the pump and timing kit which was being replaced anyway.
Engine is running great which was a huge relief as i had envisaged fitting a territory motor.

I will add that i understand why workshops would lift the body to work on these,i think i damaged some muscles while lying over the motor and trying to get my hands down the back to reach some of the fuel belt cover bolts. absolutely no room to more so i had to come up with some novel methods to get the job done.
Lucky it happened during lock down since i was working from home and i had the time to strip and inspect and plan my attack.

Originally Posted by loanrangie

I will add that i understand why workshops would lift the body to work on these,i think i damaged some muscles while lying over the motor and trying to get my hands down the back to reach some of the fuel belt cover bolts. absolutely no room to more so i had to come up with some novel methods to get the job done.
Lucky it happened during lock down since i was working from home and i had the time to strip and inspect and plan my attack.

And they all say the 3.0L is quite a bit more difficult to do.