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What upset me is that the air don't seems to go throw the cylinders but only at the rear of the heads as if i had a leak near the water port...and it makes a" bubble sound", dont know how to explain it. For instance I torqued the heads to 60 NM, not yet to 90 NM.

HI, I 've just put back my Heads (with spark plugs) with a new gasket (Elring composite). When i turn the crank , I need 40 NM torque and even more after first move, and i can hear compressed air coming out almost at the rear of the heads ... Is it normal ? Valves leaks ? video here...

arrived today , very good quality indeed ! it's not a composite but called "soft metal"...may be the same. It's 1,4 mm (less one time compressed) and 0,15 mm more near the outerside of water hole (red line) , that s a great evolution because of the often leaks on this part, almost for my heads...

I bought a Elring Fibre Composite gasket 916.059...can't found the tickness but it's not a tin one.

It s a non suffix B so it 's the "classic" torque sequence with standard bolt.

I have more than 0,05 on the 2 ends, my head is bowed at the center.ARP are too expensive and i 'm not confident with streched ones. I should use a composite gasket with new standard bolts...

I don't have enough material to mill thurther. I could try to straighten the head on the block with only the ends bolts and a A4 paper under the middle head...then I check the gap with my 0,05 mm gauge .

I read a lot of leaks at the ends of the heads (near water holes) even with elring composite HG ...frighten me a little.

Right i should change for Composite HG , and reuse my standard bolts...there still in good shape and not overtightened the last time.

i checked the head flatness with a special tool (300 mm ruler grade 00). All is under 0,05 mm gap EXCEPT the two ends where i found 0,08 mm difference (red part on the pictures) when I take the measurement with 300mm length of the ruler (from the center to the end) If i take the measure with...

Thanks. My gasket is a tin one from Payen (not Erlring)

I have elring metal gaskets ;) I clean very well the threads and will be very careful in the torque...i have 14 bolts heads

I put the wrong photo. For a non suffix B engine its 23,9 mm and 63,5 mm . I get 23,30 and 62,80 with my vernier caliper...with 0,1mm precision ;)

I have 7 mm skimmed instead 5 mm...

Hi, after surfacing my heads (to clean the old gasket marks) i found these measures : 23,30 mm (+ 0,1mm / 0,5 mm max. skimming ) 62,80 mm ( + 0,2 mm / 0,5 mm max skimming) Should i put a thiker composite gasket instead a metal one ? the gap can be fill with shim on rockers ?

the heads were already skimmed 10 years ago.I check with a plate and 0,05mm gauge, seem ok. i have to sand the inlet manifold too... should i stay with 400 paper or finish with 800 ? i have a metal gasket. Thanks.

the old seal has left marks...do i need to remove all before setting new gasket ? I use sand paper on a glass to remove these marks but i dont want to remove too much material; Is that enough like this ? Plus, I notice i remove more on the sides than in the middle , the head is not perfectly...

after the piston removal, the ridge does not goes lower in the cylinder, so,i suppose i can delete the hypothesis of rings gap in line...

I still have grooves ;)