Torque values on the head bolts of a Hyundai mower

[oovarvoo]

I am replacing the head gasket on a Hyundai HYM430SPE and I contacted their technical support at Powerspares.co.uk for the torque values of the head bolts and they came back with 50 to 60 NM which I thought could not be correct so I asked them to double check so they contacted Hyundai directly. They emailed me back a eek later and said it was 45 to 50 NM, which I still think is very very high, what are peoples thoughts?
I also asked for the valve clearances which they said were inlet valve 0.10mm and exhaust 0.15mm.

Thank you.

[Mick]

Hi oovarvoo, and welcome to TGMF.

What size are the bolts?  I'm not sure of the exact settings for that engine, but I would suspect the torque setting to be under half of what they quoted those figures are very high.

Valves, I would say 4-6 thou for the inlet and 6-8 thou for the exhaust should be fine.

Hopefully someone will come up with a definitive answer for you.