porus mod for c20xe

[richz_nova]

Hi all, im going to be doin the porus mod on my engine, just wonderd what im going to need to do. ive read on the net about it seems pretty straight forward i know about the 8mm tube roughly 87mm long is this correct. Where is the best place to get it from. Any info would great

Cheers

[brainsnova]

Someone on here was selling the tube and there was a how to on here or mig

[brainsnova]

Bubba was selling the tube and here's the guide he was using

http://www.orsas.com/CarStuff/cav/sleeving.php

[richz_nova]

Cheers mate that's what I read earlier. someone was selling em on g-bay but can't find them now

[brainsnova]

Here's the old thread and I'd guess he still has some so message him and see :thumb:

http://www.pngclub.com/forum/showthread.php?179713-8mm-Cracked-Porus-head-tube-fix-for-XE-LET&highlight=

[pie]

bubba was the one on ebay selling them to :)

[richz_nova]

Nice one mate just pm him

cheers. Have a blob from me

[richz_nova]

Just gave a blob to pie lol never mind merry Xmas lol

[Bubba]

Pm replied to. Don't have the Web anymore so not on much. I have a few left.

[richz_nova]

Pm replied to. Don't have the Web anymore so not on much. I have a few left.


pm replied back

[Iain]

B&Q I think, cheap for a metre's worth

[richz_nova]

does it mater how thick the wall is of the tube

[Iain]

I guess not, although you want it thick enough to work and thin enough to not restrict oil flow too much

[richz_nova]

i see what you mean mate, bnq have some 1mm thick ill try find some 1.5 think that might be better??? or is that still to thin anyone?

[meritlover]

im wall thickness on such a small bore tube will hold a LOT of pressure. far more than is required here. especially since the bore of the head is such a close fit on the tube.

[richz_nova]

i found this pic, from what i make out it need to be in the centre how do i know its in the right place http://i1254.photobucket.com/albums/hh601/richznova/tube_zps5a8bc2ae.jpg

[Iain]

Guide here to follow:

http://www.migweb.co.uk/forums/engines-transmission/340906-thought-id-have-go-porous-cracked-head-modification.html

The stuff from B&Q will be fine and is pictured in the above how-to.

When you cut the tube to the right length its obvious where you need to stop when fitting it

[meritlover]

i would imagine if the tube is the correct length to start with and it is flush with the vertical drilling, then its in right.

also, your issue with communication between the oil and water should cease.

[richz_nova]

ok cheers for your help guys, i did notice earlier when i took my inlet manifold off, that my head has only one grub screw on the exhaust side but the one in the pic has them both sides is this just because mines early?

http://i1254.photobucket.com/albums/hh601/richznova/WP_000077_zps06b15046.jpg
http://i1254.photobucket.com/albums/hh601/richznova/WP_000075_zpsc7ed39c9.jpg

[Iain]

My early head had a grub screw on both sides so frick knows. Just make sure you don't hammer it in too far!

[meritlover]

the above section only shows one grub screw or are there more pictures?

[jonn]

i have only one grub screw in a c20xe head as well and 2 in another head both are GM. is that the difference between early and late?

[richz_nova]

My early head had a grub screw on both sides so frick knows. Just make sure you don't hammer it in too far!

ok sound lol


the above section only shows one grub screw or are there more pictures?

do you mean the pics from my engine or the showing how its done


i have only one grub screw in a c20xe head as well and 2 in another head both are GM. is that the difference between early and late?


im not to sure to be honest mate, when i spoke a friend earlier he said he had a late in his garage and that had 2 screws in it. so as Iain said frick knows

[womble sri]

B&Q I think, cheap for a metre's worth

I bought mine from b&q was a few years back but 8mm sound right! Really easy to do

[Peanut_119]

Just a quick question, my xe head has had this mod done but is still porus? What would the reason be? Tube not in far enough? Not a tight enough tube?

Any answers would be great

[pie]

^^^ did you clean all the pipes n rad out last time it went porus?

[meritlover]

do you mean the pics from my engine or the showing how its done



the how-to page on the link and the picture which was posted above yours.

[Peanut_119]

Pie, last head didnt go porus, it bent plenty valves etc... The new head I bought had the porus mod done (head was off Gaz on cavmk3)

[dc1984]

Hey lads,

I have a mk3 astra that seems to have this problem.

I dont really have any mechanical knowlege but i am wanting to try and repair the engine before i break the car so i have a decent spare engine for the nova.

Is there any order to taking the parts off etc and should i replace any parts when i do it?

Any help would be great.

P.s sorry for hijacking the thread just didnt see the point in starting a new thread about the same things.

Cheers,
David.

[richz_nova]

the how-to page on the link and the picture which was posted above yours.

no thats it on that link, but the other link shows his head had grub screw on front and back.

[richz_nova]

Hey lads,

I have a mk3 astra that seems to have this problem.

I dont really have any mechanical knowlege but i am wanting to try and repair the engine before i break the car so i have a decent spare engine for the nova.

Is there any order to taking the parts off etc and should i replace any parts when i do it?

Any help would be great.

P.s sorry for hijacking the thread just didnt see the point in starting a new thread about the same things.

Cheers,
David.

hi mate im not to sure about taking parts off in order, ive just unbolted the inlet manifold off the head. im going to get my mate to pull the head off because i believe the cam holders and stuff need to go back on in the same place they come off or something? and ive also read on the net somewhere ill try and find it, you need to replace all the water pipes, cause the oil thats passed through them will have made them soft. also heater matrix obviously if its not goin back in the same car you dont need to also the water pump???

[richz_nova]

http://www.topbuzz.co.uk/info/porous_heads/porous_heads.htm

think that is the one i read about changing the water pump etc.

[dc1984]

http://www.topbuzz.co.uk/info/porous_heads/porous_heads.htm

think that is the one i read about changing the water pump etc.

Excellent "richz_nova" thanks again bud.

[BRoadGhost]

If the tube is 87MM long; how far should it be tapped in?

[Iain]

Till yu can't see it when you look straight down. It's behind an oil gallery or bolt hole can't quite remember