Seastoke
Well-Known Member
So is it right the oil cooler just sits floating held by by two hoses held with jubilee clips . ok just a change update the hose shot off at high revs.
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Volvo D6 oil cooler 370 hp
- Thread starter Seastoke
- Start date
[2068]
...
Is that the steering oil cooler?
Which oil is it cooling?
Which oil is it cooling?
spannerman
Well-Known Member
No thats the fuel cooler if you mean the one behind the fuel filter, if low down on the water inlet hose thats the servo oil cooler, the oil cooler is on the aft end of the heat exchanger under the oil filter housing.
Seastoke
Well-Known Member
the hose from or to the pump , goes on one end of cooler, ther seems that a little bracket off the engine clips into the jubilee clip somehow.
starfire
Well-Known Member
That's the fuel cooler. Getting the hose, bracket & clip on correctly is a pain.
If the hose is at all frayed, replace it!
There is full pressure from the water pump on there, if the oil, intercooler etc are slightly blocked, it can blow that hose.
We had one go that soaked the battery charger., expensive
If the hose is at all frayed, replace it!
There is full pressure from the water pump on there, if the oil, intercooler etc are slightly blocked, it can blow that hose.
We had one go that soaked the battery charger., expensive
Seastoke
Well-Known Member
WHEN you say oil cooler blocked do you mean fuel or oil , and does it mean i might need to do a rydlem clean ????
starfire
Well-Known Member
It happened on a pair of them where the tubes on the heat exchanger were partially blocked.
There are 3 elements to the cooler stack, heat exchanger, oil cooler & intercooler, plus the fuel cooler in front & the gearbox cooler before the injection elbow.
If there is any sign of white fur on the end caps, or any sign of drips around the starter motor, it's time to strip & clean the tubes & more importantly, change the o rings.
They should be pressure tested before refitting, not all volvo dealers bother with that
Part of the problem is the outer housings are aluminium, anything leaks & they rot.
The oil cooler housing is obsolete, I had to get these welded & machined.
If it does fail, there is a chance if salt water entering the oil system & that is terminal!
There are 3 elements to the cooler stack, heat exchanger, oil cooler & intercooler, plus the fuel cooler in front & the gearbox cooler before the injection elbow.
If there is any sign of white fur on the end caps, or any sign of drips around the starter motor, it's time to strip & clean the tubes & more importantly, change the o rings.
They should be pressure tested before refitting, not all volvo dealers bother with that
Part of the problem is the outer housings are aluminium, anything leaks & they rot.
The oil cooler housing is obsolete, I had to get these welded & machined.
If it does fail, there is a chance if salt water entering the oil system & that is terminal!
volvopaul
Well-Known Member
Oil cooler housing available I bought one last week .
This post is about leaking diesel from fuel cooler it rots the rubber hose causing it to split .
New cooler and hose required.
Seastoke
Well-Known Member
So thanks for all input , sorry late replies i had to take a week off, thanks mods . So oredered new hoses and rydlem , i just need to connect the pump in circuit . Now do i conect from pump to pipe on heat exchanger and return to ryd tank from water pipe going into exhaust . does any one know what size these pipes are so i can go and connect easy .
spannerman
Well-Known Member
I did a D6 last week and I took off the seawater filter housing and plumbed into the hose going to the fuel cooler and return from the hose on the aft side of the exhaust bend then you rinse the whole system, sorry but don’t know the exact size as we have adapters ready made to suit most engines so didn’t have to check the hose sizes.
Seastoke
Well-Known Member
So i am going and try the flush tomorrow
volvopaul
Well-Known Member
The hose going into the fuel cooler takes a 60 mm hose clip that’s outside diameter and the pump end takes a 55mm hose clip so I’d guess the inside diameter is approximately 50 mm .
