Hi

 

Bought a 2015 petrol Octavia VRS about 9 months ago and now it needs some maintenance. I'm keen to DIY but looking for confirmation it's all possible.

 

One of the fuel hoses connected to the high pressure pump is cracked and needs replacing. To do that I'll need to depressurise the fuel system, but the service manual says "Vehicle diagnostic tester and carry out the targeted function “remove high fuel pressure”." But I don't have this tool...

 

In previous cars I've just removed the fuel pump fuse or relay and then run it til the engine shuts down. Is this possible with the TSI engines?

 

The other issues are:

 

* Coolant weeping from radiator end tank. Am inclined to leave this til it gets worse - interested if this is a bad idea. Obviously will be keeping an eye on the coolant.

 

* Missing intake manifold support. How important is this? Will the plastic manifold crack without it?

 

Thanks in advance for advice...

Just crack open the joint slowly with a cloth over it to catch any spurts.   Don't have to tell you not to have a lit  fag around do I or hot light bulbs.

 The support is  there for a reason,      VW not known for fitting parts that don't do anything.

25 minutes ago, Cap44 said:

Just crack open the joint slowly with a cloth over it to catch any spurts.   Don't have to tell you not to have a lit  fag around do I or hot light bulbs.

 The support is  there for a reason,      VW not known for fitting parts that don't do anything.

With fuel pump unpowered (ignition off) of course.

12 hours ago, aussie_vrs_owner said:

Coolant weeping from radiator end tank. Am inclined to leave this til it gets worse - interested if this is a bad idea.

That can only get worse, until your car vanishes in a cloud of its own steam.

On 12/12/2022 at 07:21, aussie_vrs_owner said:

 

 

* Coolant weeping from radiator end tank. Am inclined to leave this til it gets worse - interested if this is a bad idea. Obviously will be keeping an eye on the coolant.

 

 

 

I wouldn't - I've been caught out by something similar in the past. It causes problems when you least expect - in my case I destroyed an engine. This was a long time ago. Newer modern engines can be more susceptible re problems with water loss as cooling systems can be zoned and designed with low engine coolant capacity to decrease warm up times.

Edited 14 December, 20223 yr by bigjohn

Thanks everyone. Appreciate the comments. Going to do the fuel line and intake manifold bracket this weekend, then away on hols (not driving) and will sort the radiator when I get back. To be clear, it doesn't use up any detectable amount of coolant, but obviously agree the leak will get worse.

 

The intake manifold bracket was very cheaply priced, less than AU$10 new. The fuel line not so much (about $70).

On 13/12/2022 at 06:22, Cap44 said:

 The support is  there for a reason,      VW not known for fitting parts that don't do anything.

 

This convinced me