Webasto Dosing Pump.

[Brian422]

From new my Diesel Webasto Thermo Top C has used, according to it's profile,  a DP2 Dosing Pump.

 

I understand a Diesel installation should use Dosing Pump DP 30.2.

 

I would be grateful if someone would advise on the differences between the two pumps and should I replace the DP2.

 

Regards and Thanks 

Brian. 

[matty40s]

The Thermotop Evo uses a pump which is much quieter and operates at variable speeds, with a much higher pulse rate than the ThermoC when at full belt.

If your pump works, keep using it until it doesnt, then replace with the recommended one.

[Chewbacka]

Being curious I looked up the price of a genuine Webasto DP30 fuel pump.

It’s almost £200!!!

Here is the link if you want one

https://www.butlertechnik.com/webasto-heater-fuel-pump-12v-dp30-86115a-86115b-85106b-p138

Edited March 24, 2023 by Chewbacka

[Brian422]

Thanks for reply but I'd found listing on butlertecnik.

 

Really want to know whether there's a requirement to replace a little used DP2 with a DP30.2.

[Chewbacka]

9 minutes ago, Brian422 said:

Thanks for reply but I'd found listing on butlertecnik.

 

Really want to know whether there's a requirement to replace a little used DP2 with a DP30.2.

Assuming you have been running the system for a reasonably long time and it works fine without using an excessive amount of fuel, how will changing the pump make it work better?

 

When I fitted my Webasto heater (a few years ago) I called Butler Technik with a couple of technical questions and they were very helpful, they could probably answer your question, why not give them a call.

 

That said, I am pretty sure Matty40s also knows a lot about Webasto’s so I would happily trust his advice.

[David Mack]

On 24/03/2023 at 11:00, Brian422 said:

From new my Diesel Webasto Thermo Top C has used, according to it's profile,  a DP2 Dosing Pump.

 

I understand a Diesel installation should use Dosing Pump DP 30.2.

 

I would be grateful if someone would advise on the differences between the two pumps and should I replace the DP2.

 

Regards and Thanks 

Brian. 

Does it work?

If it ain't broke, why would you want to fix it?

[ditchcrawler]

4 hours ago, David Mack said:

Does it work?

If it ain't broke, why would you want to fix it?

Well 3 posts have said that now, and it sounds like sense to my 

[Brian422]

I get the if it's working leave alone.

My query was more about understanding what are the differences between the two pumps?

[Brian422]

Quote

If it ain't broke, why would you want to fix it?

Well now it's broke.

 

The original DP2 decided to pack up during a cold spell. How else would it be! It was fitted horizontally (0 degrees) by boat builder when Webasto Installation instructions indicate DP2 output should be angled at between +15 and +90 degrees.

Same instructions advise DP30.02 should be mounted horizontally i.e. 0 degrees.

Which brings me back to my original question; what's the difference between the two pumps that require a different mounting angle?

Perhaps the angle at which original was fitted shortened its life?

 

Regards and Thanks

Brian.

 

 

 

[ditchcrawler]

29 minutes ago, Brian422 said:

Well now it's broke.

 

The original DP2 decided to pack up during a cold spell. How else would it be! It was fitted horizontally (0 degrees) by boat builder when Webasto Installation instructions indicate DP2 output should be angled at between +15 and +90 degrees.

Same instructions advise DP30.02 should be mounted horizontally i.e. 0 degrees.

Which brings me back to my original question; what's the difference between the two pumps that require a different mounting angle?

Perhaps the angle at which original was fitted shortened its life?

 

Regards and Thanks

Brian.

 

 

 

Probably to get any air out when priming 

[Brian422]

Quote

Probably to get any air out when priming

Why is there an angle requirement on DP2 and not DP30.02?

 

Although following YouTube video deals with Chinese Dosing pump, from 1min 20 sec there's an explanation of pumps operation.

 

 

[Brian422]

Dosing Pump Update.

 

Decided to ask Webasto the difference between DP2 and DP30.02  mounting angles and received the follow reply:

'Dosing pumps DP2 & DP30 are completely different pumps. Therefore the mounting instructions are different'.

At least they didn't respond with 28.02.

Then asked the obvious question of how different and how it affected the mounting angle and received an equally unedifying reply:

'That information unfortunately is not available'.

.... with the added comment:

'Both pumps are for heaters which are now obsolete, as all current heaters use DP42.4'

Regards

Brian.