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+--- Forum: DW10 HDi section (https://www.306oc.co.uk/forum/forumdisplay.php?fid=10)
+--- Thread: Piston direction (/showthread.php?tid=8841)
Piston direction - Ben - 11-12-2012
Could really do with confirmation about which way round the pistons go in an hdi engine. I can't find it in the Haynes manual so hoping someone has a picture from doing a head gasket or something on their engine?
Thanks for any replies
RE: Piston direction - cully - 12-12-2012
The pistons on the bus go up and down
go up and down, go up and down
The pistons on the bus go up and down
All through the town.
sorry silly time in the mornin
RE: Piston direction - gareth7 - 12-12-2012
Not sure if this'll help Ben......
![[Image: 001-4.jpg]](http://i1091.photobucket.com/albums/i395/aztechdi/001-4.jpg)
RE: Piston direction - darrenjlobb - 12-12-2012
The cutouts make it pretty obvious which way they go?
RE: Piston direction - Toms306 - 12-12-2012
I was gonna say, aren't the 'ears' where the valves will be?
RE: Piston direction - darrenjlobb - 12-12-2012
(12-12-2012, 09:08 AM)Toms306 Wrote: I was gonna say, aren't the 'ears' where the valves will be?
^^ read my previous post lol
RE: Piston direction - Toms306 - 12-12-2012
Lol, oops missed it, was distracted by the big picture!
RE: Piston direction - Ben - 12-12-2012
Cheers for the picture. I'm still not sure though because I cant tell which side of the engine the picture was taken from. I just assumed that the circular cut outs went at the front like in an xud, but I've been told otherwise, so just need confirmation that they are at the back.
RE: Piston direction - Mr Whippy - 12-12-2012
You'll need to look on your head where the valves are, then it should be obvious when you look at the block.
Or use the parts box login on here and go have a look, I'm sure there is a diagram with the pistons on alongside the block... hmmm...
Dave
RE: Piston direction - darrenjlobb - 12-12-2012
Valves are at the back / nozzles sit just frontwards.
RE: Piston direction - zx_volcane - 12-12-2012
hope this helps
![[Image: hdi-rods.jpg]](http://img.photobucket.com/albums/v363/toastmonster/hdi-rods.jpg)
RE: Piston direction - Ben - 12-12-2012
Cheers guys. I don't actually have an hdi so I couldn't look at the head etc. Thanks for the last few replies though they make it pretty clear, I found a picture of a head on eBay as well showing that valves are at the back.
RE: Piston direction - darrenjlobb - 12-12-2012
You can tell that just by the fact if you look at a hdi, the cam / rockers are at the back of the head with injectors in front
Glad you sorted it
would be an epic fail if you put them in wrong, so no harm done asking!
RE: Piston direction - Ben - 12-12-2012
I've never looked at an hdi head, so have no idea where anything is on them. Im not actually putting pistons in, I was asking for my xud build, because I've now got to turn the rods around again, so I'm just making sure its the last bleeding time!