Is valve grinding ok on an HDI ??
Moderator: RichardW
Is valve grinding ok on an HDI ??
I am just about to reassemble my head after it came back from its skim, and i was about to lightly lap the valves in to check the seats were good, when i remembered you cant valve grind on some more modern engines nowdays and wondered if the HDI was one your not supposed to valve grind on ?
Thanks
Thanks
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I thought the valves were supposed to stick up slightly past the surface ?, mine certainly do !, and they did before i had the head skimmed too !!
I will get my dial gauge out and check the valve protrusion, i dont suppose you know the figures for valve height relative to the head do you ?, my haynes doesnt mention it.
And as i'm here, does anyone know the torque for the injector tips ?, i took the tips off, cleaned them out with carb cleaner and found 2 of the 5 jets were fully blocked, but after spraying carb cleaner in and blasting it through with my compressor, they are spraying a really nice fine pattern from all 5 at 90psi (i cant generate 1500 psi to test them !!, and nor would i want to anyway)
I will get my dial gauge out and check the valve protrusion, i dont suppose you know the figures for valve height relative to the head do you ?, my haynes doesnt mention it.
And as i'm here, does anyone know the torque for the injector tips ?, i took the tips off, cleaned them out with carb cleaner and found 2 of the 5 jets were fully blocked, but after spraying carb cleaner in and blasting it through with my compressor, they are spraying a really nice fine pattern from all 5 at 90psi (i cant generate 1500 psi to test them !!, and nor would i want to anyway)
Checked the valve protrusion and 7 were in spec, 1 was 0.12 over, so i just spent 2 hours with coarse paste (again!) getting it within spec, i left it at exactly 0.20mm, so everything is within spec and ready to go back on
I'm glad you mentioned valve prottrusion now Citronut, i would have put it all back together and risked no 5 valve whacking the piston which wouldnt have been good !
Cheers
I'm glad you mentioned valve prottrusion now Citronut, i would have put it all back together and risked no 5 valve whacking the piston which wouldnt have been good !
Cheers
This is my holy grail site i use for all my technical information on my D9 406
http://petrila.net/peugeot/Service/406D ... recap3.htm
And this is the page that says about valve protrusion on the 2.0 HDI, the 2.2 HDI has to have the valves sunk, but the 2.0 HDI has to have the protruding 0.2mm as far as i can see (have a look and double check please though!)
Look at step 4 in the link below
http://petrila.net/peugeot/Service/406D ... dj0dk3.htm
http://petrila.net/peugeot/Service/406D ... recap3.htm
And this is the page that says about valve protrusion on the 2.0 HDI, the 2.2 HDI has to have the valves sunk, but the 2.0 HDI has to have the protruding 0.2mm as far as i can see (have a look and double check please though!)
Look at step 4 in the link below
http://petrila.net/peugeot/Service/406D ... dj0dk3.htm
Injector disassembley and cleaning (in case anyones interested!) along with the tightening torque of the nozzle tip holder (33 foot pounds)
The injector bodies are different to HDI injectors, but the internals are pretty much identical to what you will find
http://pics2.tdiclub.com/pdf/injector_install_howto.pdf
The injector bodies are different to HDI injectors, but the internals are pretty much identical to what you will find
http://pics2.tdiclub.com/pdf/injector_install_howto.pdf
Thats correct too, the pistons do stick up, but the piston tops are a very odd shape with a very deep doghnut shaped combustion chamber in the centre, and valve shaped cutouts that the valves fit into when the piston comes up
It looks like tolerances are seriously precise on the HDI's, but i am confident that its all done correctly now and i am using a 5 notch 1.5mm thick gasket just in case too !!
It looks like tolerances are seriously precise on the HDI's, but i am confident that its all done correctly now and i am using a 5 notch 1.5mm thick gasket just in case too !!