i have a '91 civic hb recently the d15b7 that had on it blow up,i bought a d16y7 with a d16y8 head on it,the block had a thread on one head bolt damaged,i fix it put a new head gasket,set the head,torque it down,and when i started it it's leaking oil between the head and the block on the timing belt side,any help will be greatly appreciated.

 

Did you torque the bolts down in the proper order and in intervals? If not, you may have ruined the gasket.

Torque Sequence:

9 3 1 5 7
8 6 2 4 10
(front of car)

In 4 steps:

1. 14 lb-ft
2. 36 lb-ft
3. 49 lb-ft
4. 49 lb-ft (bolts 1-2 only this time)

 

yes i did,i'm thinking probably the block is warp,which it will be very rare but not impossible

 

i did,probably the block is warped,the head i know it has been refurbish,