gazza1591 · Apr 11, 2015

Hi all

Looking to replace my head gasket, P gasket and valve steam seals on my discovery 1 300tdi just wondering if anyone can recommend a good place for replacement parts and what brand/make is good to go for?

gazza1591 · Apr 11, 2015

Also can anyone point me in the right direction for a good video or picture guide of the steps in a head gasket change, done one before on a car but not a discovery so got a sort of idea what needs doing, but any tips etc would be helpful

ArticFox · Apr 11, 2015

I get a lot of parts from Paddocks, island4x4 and lrs offroad. They seem to be about the cheapest.

gazza1591 · Apr 11, 2015

Cool cheers is the 3 hole gasket the one to go for? Mine currently has this on it so I guess replace like for like?

jamesmartin · Apr 11, 2015

gazza1591 said:
Cool cheers is the 3 hole gasket the one to go for? Mine currently has this on it so I guess replace like for like?

unless you measure piston height and valves ,youd be best using 3 hole (errr5263g)composite would be my choice and dont forget to remove block drain on lhs first

gazza1591 · Apr 11, 2015

Sorry what's the block drain?

jamesmartin · Apr 11, 2015

brass plug on lhs of block

gazza1591 · Apr 11, 2015

Oh OK on the bits I have read and seen none mention this have to find exact location or a better guide to follow cheers for info

jamesmartin · Apr 11, 2015

gazza1591 said:
Oh OK on the bits I have read and seen none mention this have to find exact location or a better guide to follow cheers for info

if you dont coolant will enter the cylinders when yo undo the head bolts ,have a look, you can see it here under first core plug
Google Image Result for http://i483.photobucket.com/albums/rr197/v8bobber2008/300tdi_1.jpg

gazza1591 · Apr 11, 2015

So it's the brass coloured but below the yellow plug? Any ideas what size it is?

jamesmartin · Apr 11, 2015

gazza1591 said:
So it's the brass coloured but below the yellow plug? Any ideas what size it is?

yes thats it and a 13mm socket or spanner will undo it

gazza1591 · Apr 11, 2015

Cheers thanks for that, just need a decent guide or video now I think then order bits and have a go, just hope I don't go wrong

jamesmartin · Apr 11, 2015

its quite a simple job on a tdi , just ensure you set tappets after, and for tightening head bolts you need a torque wrench suitable for 40nm and then for the 2x60 degrees you can use one bolt flat as a gauge if you mark the head so you know youve turned bolt exactly one flat ,likewise for the 10 bolts directly surrounding cylinders the extra 20 degrees can be gauged as a 1/3 of a flat

gazza1591 · Apr 11, 2015

Cheers for the info, that's the inky bit I'm worried about is setting the tappet. Also setting the 60 degree after have a few torque wrenchs so setting torque is no problem, is there some type of gauge you can buy to set the degrees after if so anyone know what it would be called?

jamesmartin · Apr 11, 2015

gazza1591 said:
Cheers for the info, that's the inky bit I'm worried about is setting the tappet. Also setting the 60 degree after have a few torque wrenchs so setting torque is no problem, is there some type of gauge you can buy to set the degrees after if so anyone know what it would be called?

youd be better tightening bolts as i suggested rather than using an angle gauge,you need an 8 thou feeler gauge(0.2mm)set when cold using no9 method which is described in this link if you scroll down
https://www.google.co.uk/url?sa=t&r...CLgPgN&usg=AFQjCNE4NbKl-gsyqCbdek3oIpMsvI2QQA

gazza1591 · Apr 11, 2015

Thanks for that gonna make a list of all the kit in morning I will need and get it ordered in. Thanks for all the advice

gazza1591 · Apr 11, 2015

Sorry anyone advice best way to replace valve stem seals? And what tools i will need to do these?

jamesmartin · Apr 11, 2015

gazza1591 said:
Sorry anyone advice best way to replace valve stem seals? And what tools i will need to do these?

valve spring compressor ,pliers to pull old ones off and bihex 12 or 13mm socket to tap new ones home

gazza1591 · Apr 11, 2015

Any recommendations on a good compressor and pliers? I guess it will be easier to do this with head off the engine? Anyone got a guide for doing these?

jamesmartin · Apr 11, 2015

if your taking head off its easier

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