Oil cooler

[standfirmrasta]

Hi,

What do parts 2a thu 9 do and what happens if they fail?

 

[volvopaul]

Hi,

What do parts 2a thu 9 do and what happens if they fail?

One is piston cooling jet relief valve , other is main oil gallery relief valve . There is also a valve inside the sump .

 

[BruceK]

One is piston cooling jet relief valve , other is main oil gallery relief valve . There is also a valve inside the sump .

VP can you confirm if they are worn there would be a resultant loss of oil pressure? And more importantly, how does one actually remove 2A to replace it? It appears to be a rather tight push fit as if it's been put in with a drift

 

[standfirmrasta]

VP can you confirm if they are worn there would be a resultant loss of oil pressure? And more importantly, how does one actually remove 2A to replace it? It appears to be a rather tight push fit as if it's been put in with a drift

Thanks but i need to know the symptoms of failure please?

 

[BruceK]

Low oil pressure. Insufficient piston cooling if worn. Over pressure if blocked Id guess as the oil pump is a volume pump.

 

[standfirmrasta]

Ok thanks.....so I’ve got massive oil pressure coming up into the rocker arm via the small delivery pipe located in the head, could this be a symptom?

 

[BruceK]

I think you really need to get hold of Volvo Paul on this one. If you have an existing problem with oil feeds and pressures it's rather important you get your info from a qualified engineer rather than me continuing to postulate. PM him if necessary he's very generous with his help and advice. As to your original question they are oil pressure relief valves. How they in turn port through the block I dont know with certainty and I only climbed in because I changed mine (they're penny parts) to see if it cured a slightly lower oil pressure on one engine but stopped at the point of 2A as there appeared no way to remove those piston sleeves without resorting to force.

 

[Montemar]

What is the reason behind the post?

 

[standfirmrasta]

One is piston cooling jet relief valve , other is main oil gallery relief valve . There is also a valve inside the sump .

What is the reason behind the post?

I have oil gushing passed the oil pipe from the sump into the rocker arm and hence out through the crankcase breather.

 

[Montemar]

It sounds as if the oil gallery relief valve isn't doing its job.

 

[standfirmrasta]

It sounds as if the oil gallery relief valve isn't doing its job.

Can you explain where i might find that please?
Is it in the oil filter housing which i had off today and valves appeared to be OK>

 

[volvopaul]

Can you explain where i might find that please?
Is it in the oil filter housing which i had off today and valves appeared to be OK>

No it’s inside the sump .
Have you rebuilt the engine

 

[standfirmrasta]

No it’s inside the sump .
Have you rebuilt the engine

Yes engine rebuilt have a PM going with you