Volvo 2003NT series circulation pump question

[Russian007]

Originally Posted by fourlyons

The bearing has been bad for a while and allowed the impeller to tilt and grind the housing. The clearance between the impeller vanes and housing is now much larger and will mean reduced pumping capacity. Will it still be enough to cool the engine, hard to say? A rebuild kit doesn't include a new impeller or housing.

Volvo said the rebuild kit includes Gasket, 3 seals, impeller, and shaft. So perhaps that will cover it. No idea what I'll do with the 3 seals, gonna cost a fortune just to keep them fed.

The hope here is to avoid shelling out the $1800 for a new pump.

[Pete7]

Convert it to raw water cooling and remove the problem completely. Mine is 33 years old raw water cooling and still going strong. You will need to add the anode behind the alternator and change the thermostat. Dam sight cheaper than $1800. Oh and a new shorter alternator belt.

Pete

[Russian007]

Originally Posted by Pete7

Convert it to raw water cooling and remove the problem completely. Mine is 33 years old raw water cooling and still going strong. You will need to add the anode behind the alternator and change the thermostat. Dam sight cheaper than $1800. Oh and a new shorter alternator belt.

Pete

You don't think the $600 rebuild kit would suffice?

[Pete7]

Oh, thought you said $1800 which would be too much for me. Its still $600 which is a lot. You could try to find a second hand one, probably in Europe.

Try Sean to see what spares he has in stock.

https://marineenterprises.co.uk/

[Russian007]

Originally Posted by Pete7

Oh, thought you said $1800 which would be too much for me. Its still $600 which is a lot. You could try to find a second hand one, probably in Europe.

Try Sean to see what spares he has in stock.

https://marineenterprises.co.uk/

The entire unit is $1800 the rebuild kit, consisting of impeller, shaft, seals and gasket is $600-- still a gouge. This company, sells a 3rd party kit (lacking the impeller) for $55. That's almost too cheap. https://www.parts4engines.com/volvo-...mp-repair-kit/

[deblen]

I have a 2003B (non-turbo) fresh water cooled like yours.
My fanbelt is very close to oil filter on alternator side. It wore a pin hole in the filter once ,the oil sprayed on the belt & I had a stripe of oil just like you have.
Perhaps you should check/change your oil filter.
Cheers/Len

[Russian007]

Originally Posted by deblen

I have a 2003B (non-turbo) fresh water cooled like yours.
My fanbelt is very close to oil filter on alternator side. It wore a pin hole in the filter once ,the oil sprayed on the belt & I had a stripe of oil just like you have.
Perhaps you should check/change your oil filter.
Cheers/Len

I already tossed it-- I think that happened. I sucked the oil out of the engine yesterday. filter was a mess. Yes, it is close to the fan belt. I think the belt-- which was less than 6 months old, got stretched from all this trauma and heat.

[jamhass]

Don't try to "pry" the pump shaft out apart, it really does take a proper press. It can be amazingly hard to disassemble, even with a press. Inspect the impeller, shaft and housing carefully for wear. If you are lucky, it will only need bearings and seals. If the impeller is good, and the shaft is only slightly worn a "shaft sleeve" (Google it) might save the shaft. Also check the housing carefully. If it is worn, you are indeed in for a new or good used pump.

Reinstallation is a juggling act, as you now well know, all three pipes need to come together at the same time. You should loosen the other ends of the pipes and use new seals everywhere. Otherwise, you will chase leaks forever.

I had a V2003T and am well familiar with that pump. There really are no shortcuts here.

[Russian007]

So the impeller has ground off about 2mm of the housing it spins in. Would appreciate some thoughts on this. I'm not concerned by the structural integrity, but the fact it's out of round is worrisome. Attachment shows the wear.

[Russian007]

Originally Posted by jamhass

Also check the housing carefully. If it is worn, you are indeed in for a new or good used pump.

Reinstallation is a juggling act, as you now well know, all three pipes need to come together at the same time. You should loosen the other ends of the pipes and use new seals everywhere. Otherwise, you will chase leaks forever.

Yes those damn copper pipes are a PIA. Ended up unbolting them from the block! Boobie trapped!
Check the photo in previous post above if you have a moment, the housing is indeed worn. impeller ground off about 2mm of the casing.

[deblen]

Listen to Jamhass re rubber pipe seals-buy new ones-old ones will leak.


Here is some info about how cooling works.


http://coxeng.co.uk/wp-content/uploa...hot-water1.pdf

[Russian007]

Originally Posted by deblen

Listen to Jamhass re rubber pipe seals-buy new ones-old ones will leak.


Here is some info about how cooling works.


http://coxeng.co.uk/wp-content/uploa...hot-water1.pdf

Yes. And the seals are apparently the only affordable Volvo part.

[deblen]

I don't know your location,but used parts show up on Ebay USA & Ebay UK occasionally.
I found a complete used,servicable 2003 circ. pump awhile back for US 150.
Just lucky.


https://www.ebay.ca/sch/i.html?_from...Condition=3000

[deblen]

More info regarding rubber seals,etc. https://www.cruisersforum.com/forums...-197474-2.html

[glenn.225]

Originally Posted by Russian007

So today I finished taking off the freshwater pump. It's seized. Cracked it open and didnt see any foreign objects. However the impeller doesn't look fully centered in the housing. Is that normal?

Second question: what's my next move? get a press to force the shaft out of the housing?

Well I suspect your going to need a whole new pump. The wear on the case opposite of the impeller looks pretty bad, at least from the photo. This is a machined surface with a specific clearance from the impeller and yours looks to be beyond the "good enough" stage.

Also as someone above said pressing out and back the shaft is a job for a big press. Probably easiest and cheapest way to do is to take the kit and pump body to auto or machine shop and have them do it.

I've done a more than few pumps over the years and some can be a real chore to get apart. And I've seen a couple that broke the housing before the bearing would move.
Good luck with it.