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| Lapping plate for cleaning a cylinder block face in situ. |
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| doubleboost:
A small surface plate or a brick with 80 grit emery paper Put some thick oil down the bores this will keep the bits out of the top ring Are the head bolts not "stretch bolts" a small initial torque plus a set amount of degrees (use cv grease under the head bolts nuts) gives a nice smoothe torque The head will be warped if it has been hot but a cast iron block wont move much John |
| Pete.:
I use M12 x 1.25 12.9 socket caps on my bike torqued to 75 foot pounds, those things ain't stretching much :) I've heard of people taking them to 100 but I didn't have the guts to go that far. I use a standard gasket but Cometic seem well-regarded by most of the people I know. |
| dawesy:
Arp arnt stretch studs. 65ftlbs is all the torque they take :( ( using arp assembly lube) they are reusable if still in spec I have herd of heads lifting but normally only above 2.2bar boost. I'm only running 1.8 so that shouldn't be happening. Thanks john. Not got round to measuring the head yet. I'm expecting it to be a tad warped. |
| doubleboost:
Modern engines are highly stressed before you even start modifying them John |
| dawesy:
This is true john. Tbh if you think about it it's over 200 hp per ltr. |
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