anti-drainback valve and heaters

[isbjorn]

Hi.

Someone told me that a water heater (like webasto) requires an anti-drainback valve on the TD5 Engines. Is this true? The heater will be place after the expansion tank and just before the fuel cooler.

Hmm, for some reason I cant get the Cooler system component layout in RAVE to fit with my TD5. The section with the expansion tank does not look like it does on my car. Is this possible? The heater return hose goes in to a T-connection with expansion tank on left and fuel cooler on the right. Or am I totally lost?

thanks

frist gen td5 from 99

[western]

these are from my RAVE '99 Td5 info

coolant system items layout & coolant flow diagrams below.

are they the same as you have ?

[isbjorn]

Nope. My RAVE shows this. Its the only 1999 Defender spec my version has unfortunately. But your version is the right one... thanks, it all makes sense now.

[isbjorn]

Do you know if the heater might requires a anti-drainback valve? its placed at the red cross in your version... The reason is that someone said it would draw air from the expansiontank. Can this be possible?

[western]

if the header tank is correctly filled to the level as marked on the tank body, there should be no way air can get into the cooling system,

[isbjorn]

Thanks what I thought. Thanks for confirming.