volvo 2003 thermostat

[Gwylan]

Who knows the magic number to get a regular car thermostat equivalent for the valve marine part.
I have a NAPA equivalent but that's an American version of Halford.

It must exist, someone here must know it.
£50 for a £5 item seems at bit excessive.

Then again have you seen the price of the 2003 water pump?

 

[Trundlebug]

Just take the old thermostat in to a reputable motor factors and they'll sort it for you.

 

[Gwylan]

Just take the old thermostat in to a reputable motor factors and they'll sort it for you.

Excellent, lateral idea, me and the boat and motor factors are separated by many miles, but it may come to that.

Thanks

 

[VicS]

Who knows the magic number to get a regular car thermostat equivalent for the valve marine part.
I have a NAPA equivalent but that's an American version of Halford.

It must exist, someone here must know it.
£50 for a £5 item seems at bit excessive.

Then again have you seen the price of the 2003 water pump?

It may not exist.

The spec is for one that opens at 60C for a seawater cooled engine or 74C for a freshwater cooled engine. Car types open at somewhat higher temperatures

 

[Gwylan]

It may not exist.

The spec is for one that opens at 60C for a seawater cooled engine or 74C for a freshwater cooled engine. Car types open at somewhat higher temperatures

Older cars do do the 74C version, that's the NAPA, Sierra part number and is listed on American sites, just trying to find one without the prospective customs and freight issues.

 

[Trundlebug]

Excellent, lateral idea, me and the boat and motor factors are separated by many miles, but it may come to that.

Thanks

Alternatively you could photograph it, and take measurements before going to or emailing to a motor factors.
I was going to suggest that you will be able to find a number of different temperature options for a given size, to suit different applications.
Something I used to my advantage when I wanted to fit a higher temp thermostat to my stbd engine (90 degrees) to make the heater work more effectively than with the standard 82 degree one.

 

[Tim D]

Give Keypart a ring, just type in 2003 into the big search box then scroll down to cooling.

http://www.keypart.com/

 

[Trundlebug]

Give Keypart a ring, just type in 2003 into the big search box then scroll down to cooling.

http://www.keypart.com/

Keypart are OK but you only save about 10% on Volvo prices.
That still makes things exhorbitantly expensive by real standards.
My local swindlery will give me 10% off Volvo prices for being a local boat club member.

For many items that are common to automotive or other applications there are much much lower cost alternatives.

 

[VicS]

Highway Marine Service Centre in Sandwich, Kent apparently offers Sierra marine parts .

May be worth a try,

 

[aluijten]

Then again have you seen the price of the 2003 water pump?

Didn't you know it was made out of solid gold
I once had to buy one for my engine, almost had to take an extra job to pay for it. My car has a circulation pump that has to keep twice the number of cylinders cool for one-third of the price. Silly VolvoPenta people.

 

[vyv_cox]

If it is a raw water cooled engine there is no automotive equivalent. This type of thermostat opens the coolant supply from the engine while simultaneously closing the bypass. It has a plate on the inboard end for this purpose, unlike one for a car.

 

[VicS]

Silly VolvoPenta people.

Clever Volvo Penta people

They sell the engines at rock bottom prices to the boat builders.
Make their profits from the parts sales.

 

[Trundlebug]

If it is a raw water cooled engine there is no automotive equivalent. This type of thermostat opens the coolant supply from the engine while simultaneously closing the bypass. It has a plate on the inboard end for this purpose, unlike one for a car.

You mean like a post with a disc on the end extending into the cylinder head side (rather than outlet side)?

There are several automotive thermostats like that.

Edit: Like this http://en.wikipedia.org/wiki/Wax_th...r/File:Double_valve_automotive_thermostat.jpg

Or are raw water cooled thermostats different?

 

[vyv_cox]

You mean like a post with a disc on the end extending into the cylinder head side (rather than outlet side)?

There are several automotive thermostats like that.

Edit: Like this http://en.wikipedia.org/wiki/Wax_th...r/File:Double_valve_automotive_thermostat.jpg

Or are raw water cooled thermostats different?

Yes, pretty similar to that. I have never come across one like that in a car, any idea why they are fitted?

 

[Gwylan]

Yes, pretty similar to that. I have never come across one like that in a car, any idea why they are fitted?

Where's Volvo Paul when you need him?

 

[VicS]

Yes, pretty similar to that. I have never come across one like that in a car, any idea why they are fitted?

Car types are like that too ... although not always and not in old cars.

The last two I cahnged (1987 Fiesta diesel and 1994 Pug 106 diesel ) were like it. I think the one in my Volvo car is like it as well. The older cars were not.

The disc on the bottom closes off an internal bypass as the main part opens

Very important that the correct type is fitted because if the bypass is not closed the engine can overheat. One reason why I would be very cautious about fitting anything other than the correct part

 

[vyv_cox]

Car types are like that too ... although not always and not in old cars.

The last two I cahnged (1987 Fiesta diesel and 1994 Pug 106 diesel ) were like it. I think the one in my Volvo car is like it as well. The older cars were not.

The disc on the bottom closes off an internal bypass as the main part opens

Very important that the correct type is fitted because if the bypass is not closed the engine can overheat. One reason why I would be very cautious about fitting anything other than the correct part

I am very familiar with them on raw water cooled yacht engines but not cars. I assume they are used to provide rapid warm up of the heater circuit by directing all the engine flow through it.

 

[Pete7]

Interesting, I replaced the thermostat on our raw water cooled 2003 in the Spring. Don't remember the double spring as show in the Wiki link. It looked like an ordinary car one.

Pete

 

[VicS]

Interesting, I replaced the thermostat on our raw water cooled 2003 in the Spring. Don't remember the double spring as show in the Wiki link. It looked like an ordinary car one.

Pete

Looking at pictures in catalogues etc I noticed that the one for the seawater cooled engine did not appear to have the secondary valve, whereas the one for the freshwater cooled version did. Dunno why.

 

[vyv_cox]

Looking at pictures in catalogues etc I noticed that the one for the seawater cooled engine did not appear to have the secondary valve, whereas the one for the freshwater cooled version did. Dunno why.

In previous discussions with another forumite with a raw water cooled Yanmar we determined that the layout is pretty much exactly the same as a Bukh, which has the double thermostat action. I assume the Yanmar does also but maybe they have another way of diverting the bypass flow.

Just checked in my manual. The diverter system is exactly the same as the Bukh but the thermostat shown in a very small drawing appears to have a small plunger, maybe 12 mm diameter(?) instead of a plate as in the wiki link and on the Bukh.