Volvo TAMD41D Overheating Question

[zaria123]

Hi Folks
I have been offered a boat for sale due to overheating issues with one of the engines.
I'm not familiar with the exact engine model, or if this is an issues with this particular engine?
The owner is selling it as he has simply given up.
He has spent a fortune, and it still overheats. He has had the following work done
Oil & filter service
Raw water pump rebuilt
Turbo replaced Engine
Coolant pump rebuilt
Engine coolant hoses replaced
Heat exchangers stopped port - stbd
Cylinder head removed, pressure tested and skimmed
Injector sleeves replaced
Compressions checked
Coolant checked for exhaust gases.
HAs anyone any ideas where to go from that?
Its a really beautiful boat, and exactly what we would be looking for. If we knew we could resolve the problem.

 

[ChromeDome]

Run... no reason to insist on a lemon

 

[PlanB]

We had a similar problem with a 71B. Did all of the above and then some.
Do not buy.

 

[Mr Googler]

Exhaust elbow?

 

[volvopaul]

Hi Folks
I have been offered a boat for sale due to overheating issues with one of the engines.
I'm not familiar with the exact engine model, or if this is an issues with this particular engine?
The owner is selling it as he has simply given up.
He has spent a fortune, and it still overheats. He has had the following work done
Oil & filter service
Raw water pump rebuilt
Turbo replaced Engine
Coolant pump rebuilt
Engine coolant hoses replaced
Heat exchangers stopped port - stbd
Cylinder head removed, pressure tested and skimmed
Injector sleeves replaced
Compressions checked
Coolant checked for exhaust gases.
HAs anyone any ideas where to go from that?
Its a really beautiful boat, and exactly what we would be looking for. If we knew we could resolve the problem.

Could be a number of issues even a ghost signal to the gauge , has the work been done by a professional company, I think not as some of the listed work not relevant unless head gasket failure confirmed .

Is it shaft drive or stern drive ?

what model of boat , single or twin engine ?

 

[zaria123]

Thanks folks.
It's a shaft drive boat
They owner sent me a photo showing the engine running. And being revv'd
But when the revs are lifted off the (with the screw top lid off the coolant reservoir) the coolant overflows.
I couldn't figure out how to attach a video

 

[volvopaul]

Thanks folks.
It's a shaft drive boat
They owner sent me a photo showing the engine running. And being revv'd
But when the revs are lifted off the (with the screw top lid off the coolant reservoir) the coolant overflows.
I couldn't figure out how to attach a video

Coolant will expel with the cap off as the water pump is trying to circulate around the block and system but the thermostats are closed so water will find its own way to expand out the header tank .

 

[volvopaul]

Is the boat a Fairline ?

 

[zaria123]

It is a Fairline, yes

 

[Plum]

Hi Folks
I have been offered a boat for sale due to overheating issues with one of the engines.
I'm not familiar with the exact engine model, or if this is an issues with this particular engine?
The owner is selling it as he has simply given up.
He has spent a fortune, and it still overheats. He has had the following work done
Oil & filter service
Raw water pump rebuilt
Turbo replaced Engine
Coolant pump rebuilt
Engine coolant hoses replaced
Heat exchangers stopped port - stbd
Cylinder head removed, pressure tested and skimmed
Injector sleeves replaced
Compressions checked
Coolant checked for exhaust gases.
HAs anyone any ideas where to go from that?
Its a really beautiful boat, and exactly what we would be looking for. If we knew we could resolve the problem.

As Mr Googler said, exhaust elbow. Should have been one of the first things to check.

Www.solocoastalsailing.co.uk

 

[volvopaul]

It is a Fairline, yes

Thought so can tell by the floor joists and the terrible bracket design .
Corniche ?

 

[penfold]

Could be a number of issues even a ghost signal to the gauge , has the work been done by a professional company, I think not as some of the listed work not relevant unless head gasket failure confirmed .

Is it shaft drive or stern drive ?

what model of boat , single or twin engine ?

That would be my first question; how hot is it actually getting?

 

[zaria123]

It is a Corniche yes.
I've asked these questions..
They've not taken an relevant reading from the temperature gauge.
From discussing it appears they are basing it on the fact when they rev the engine the coolant (with the reservoir cap off) stays in, and when they lift off the throttle it throws the coolant out at pressure.
They say the other engine doesn't do that.

 

[Plum]

It is a Corniche yes.
I've asked these questions..
They've not taken an relevant reading from the temperature gauge.
From discussing it appears they are basing it on the fact when they rev the engine the coolant (with the reservoir cap off) stays in, and when they lift off the throttle it throws the coolant out at pressure.
They say the other engine doesn't do that.

It's a red herring. Why run with the cap off?

So you are now saying it is not overheating, it just pumps out coolant when the cap is off?

Put the cap on. Does the engine overheat? Does the coolant boil/expand so as to blow out of the fitted pressure cap? Is the coolant leaking/disappearing? My 41 may do the same but I have never run with the cap off.

Www.solocoastalsailing.co.uk

 

[philipdawsonladds]

I too would suggest checking the exhaust elbows, measuring actual temperature with a probe and cleaning thr heat exchangers. Much of the work seems irrelevant to the apparent over heating issue.

 

[volvopaul]

I cannot believe the owners spent vast amounts of money , does it actually overheat on a sea trial ? It’s a simple yes or a no , the cap removal test means nothing .
Have the thermostats been tested ? It’s possible they are not even fitted as that would create the blow back , he’s obviously had someone on board that knows very little about this model of engine .

 

[snowbird30ds]

I notice thermostats don't feature in that list at all, would have thought them one of the first things to check.

 

[Chris_d]

Had a similar mystery with an old TMD40, kept loosing water and overheating turned out the calorifier had a leaky hose which hadn't been spotted as it wasn't in the engine space, all the coolant ended up hidden under the kitchen floor! The engine bilge was always dry as a bone.

 

[oldgit]

Exhaust elbow?

Chum recently purchased a boat with a 41B that was exhibiting overheat problems. " Everything" of a basic nature was tried, first stop was ensuring oil coolers were clear of old impeller vanes.
A tickover speed temps were 100% but when attempting to plane temps rocketed however went back to acceptable after cooling down.
It finally turned out that the clean shiney visually immaculate riser was totally blocked with crud.
It literally fell to bits when removed. He then checked the other engine riser, nearly as bad.
Difficult to believe that the riser has not already been checked , they are usually last things to be checked but probably the easiest to inspect.
Seem to last around 4/5 years ?
Both the boats we owned with twin high hours VP 40 and 41 engines all had to have risers changed at some point during ownership.
First sign is usually rust on around the risers from micro cracks in the cast iron, left long enough it will only be the clamp round the exhaust hose and turbo holding the entire thing together.
Worth a look ?
The 41 riser looked good on removal,paint was removed afterwards and chunk of the casting simply fell out.

 

[Mr Googler]

Chum recently purchased a boat with a 41B that was exhibiting overheat problems. " Everything" of a basic nature was tried, first stop was ensuring oil coolers were clear of old impeller vanes.
A tickover speed temps were 100% but when attempting to plane temps rocketed however went back to acceptable after cooling down.
It finally turned out that the clean shiney visually immaculate riser was totally blocked with crud.
It literally fell to bits when removed. He then checked the other engine riser, nearly as bad.
Difficult to believe that the riser has not already been checked , they are usually last things to be checked but probably the easiest to inspect.
Seem to last around 4/5 years ?
Both the boats we owned with twin high hours VP 40 and 41 engines all had to have risers changed at some point during ownership.
First sign is usually rust on around the risers from micro cracks in the cast iron, left long enough it will only be the clamp round the exhaust hose and turbo holding the entire thing together.
Worth a look ?
The 41 riser looked good on removal,paint was removed afterwards and chunk of the casting simply fell out.

They are a consumable item for sure! Not that expensive and easy job