Volvo D4 charge air cooler Does this look right?

[richtayrich]

Hi everyone, so Im not having any leaks per se, however, Ive noticed some waterin the bilge ( i dont like any water in ther bilge) and have investigated by placing blue paper towelling round the Charge air cooler ends, Fuel cooler, Aftercooler, oil cooler and ran the boat for some hours.
Temps are 85 up to 3000 rpm (ish) and when I go full revs (have some weed growth on hull and drive) hit 28 knts instead of 30,temp goes to 94, no alarms, and when I back off throttle its straight down to 85.. s, so I just thought, lets check the coolers to see if blocked and leaking.

So cant see any signs of leaks, towelling had an odd spot here and there, but nothing untowards, bilge was virtually dry
So I thought about redoing the units and getting new orings etc, anyway as I guess they hadnt been doine on any service records, even though they have new plastic end cap..so must have been done some time...on investigation does this look like the previous owner epoxyed the end cap to stop a leak? is the Charge cooler unit knackered? or would I get away with the orings? dont want to open 'Pandoras box' if its not leaking..
(Out comes the wallet)

 

[Scarron]

Can't quite tell from that view, but they have definitely been 'serviced' previously. If you don't know when then do them now, it's an item of essential maintenance that must be done as the consequences of an internal seawater leak into the inlet manifold are terminal...

 

[richtayrich]

Can't quite tell from that view, but they have definitely been 'serviced' previously. If you don't know when then do them now, it's an item of essential maintenance that must be done as the consequences of an internal seawater leak into the inlet manifold are terminal...

im worried more in the fact I can see that small peek of silver metal, and the spacer has a brown sealant on it.. erring me to think there is no mating surface that will hold oif its epoxy?

 

[Portofino]

It’s not permanent as it is and it’s bugging you quite rightly.
Take it off examine it with a view to sending the cooler off to a machine shop ( that does cylinder heads etc ) and get that end skimmed .
Go from there .
Figure out the best gasket after the shops done it’s stuff .The gaskets a cat skinning excerise.

 

[Andyroonot]

Hi everyone, so Im not having any leaks per se, however, Ive noticed some waterin the bilge ( i dont like any water in ther bilge) and have investigated by placing blue paper towelling round the Charge air cooler ends, Fuel cooler, Aftercooler, oil cooler and ran the boat for some hours.
Temps are 85 up to 3000 rpm (ish) and when I go full revs (have some weed growth on hull and drive) hit 28 knts instead of 30,temp goes to 94, no alarms, and when I back off throttle its straight down to 85.. s, so I just thought, lets check the coolers to see if blocked and leaking.

So cant see any signs of leaks, towelling had an odd spot here and there, but nothing untowards, bilge was virtually dry
So I thought about redoing the units and getting new orings etc, anyway as I guess they hadnt been doine on any service records, even though they have new plastic end cap..so must have been done some time...on investigation does this look like the previous owner epoxyed the end cap to stop a leak? is the Charge cooler unit knackered? or would I get away with the orings? dont want to open 'Pandoras box' if its not leaking..
(Out comes the wallet)

Once it hits 94, if you kept going at high RPM does it keep slowly climbing? If so I’d suggest your heat exchanger element needs to be cleaned, either by flushing in situ or removal & sending to a specialist