How to / DIY > Engines

Head Bolt Torque - Changfa 175

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veggie:
Hi All,

I am replacing the head gasket on my Changfa 175 and I do not have any specs on the torque rating for the Nuts. The Head Nuts take a 19MM socket and the studs are 12 mm fine thread.
Any ideas or rule-of-thumb for a torque wrench setting on these nuts?

veggie

   [ click picture to enlarge ]

cobbadog:
At least you have a thread size and that is great. Use Google and get a 'torque settings for a 12mm bolt. Sometimes it will want to know fine or coarse thread so if it is a fine thread it will be 1.00mm pitch and not 1.25mm.

old seagull man:
Might help.

my zs 195 manual says head bolts to 25 kgf.m (kilogram force meter)
If my math is correct that's something like  180 foot pounds.

veggie:
Thanks guys.
I used that online torque guide you suggested and it recommended approx 100 ft. Lbs.
So that's what I did.
Squished the gasket good and tight.

Later dudes !

cobbadog:
I too have used the corn flake packet for my model 1 Victa over the last 50 years plus. I took the ehad off a B&S 4hp to do a valve grind and re sealed it using a head gasket spray I had left over from the grey fergy rebuild. I also just used my sockets and pulled it up tight with no issues so far.

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