FATHERnSON
New Member
- Joined
- Feb 24, 2020
- Messages
- 24
- Reaction score
- 5
- Points
- 3
- Location
- Beaverton, OR
- Vehicle Year
- 2000
- Make / Model
- Mazda B4000
- Transmission
- Automatic
Hey - New user here and looking for some help
I have a 2000 Mazda B4000 with a 4.0 OHV V6... I blew a head gasket and decided to just do a whole rebuild on the heads. I replaced valves, rocker arms, and pushrods on those old heads, but could not get the compression to start. Come to find out, my heads are cracked and valve seats are sunk, so I replace the heads and move all the parts onto the new ones. When I install those, the engine will not start, and I had no compression in four of my six cylinders whereas before it was just low. Once I backed off my rocker arms shaft support bolts down to 15 ft. lbs. from 50 I got compression back. Can I run the engine on that loose of bolts and if not what should I do? After cross-referencing casting numbers on the block, old heads, and parts supplier info I know these new heads are indeed correct. Our current plan is to buy a rocker arm pedestal shim kit so we can torque it to spec while keeping compression. Any thoughts or advice is appreciated!
I have a 2000 Mazda B4000 with a 4.0 OHV V6... I blew a head gasket and decided to just do a whole rebuild on the heads. I replaced valves, rocker arms, and pushrods on those old heads, but could not get the compression to start. Come to find out, my heads are cracked and valve seats are sunk, so I replace the heads and move all the parts onto the new ones. When I install those, the engine will not start, and I had no compression in four of my six cylinders whereas before it was just low. Once I backed off my rocker arms shaft support bolts down to 15 ft. lbs. from 50 I got compression back. Can I run the engine on that loose of bolts and if not what should I do? After cross-referencing casting numbers on the block, old heads, and parts supplier info I know these new heads are indeed correct. Our current plan is to buy a rocker arm pedestal shim kit so we can torque it to spec while keeping compression. Any thoughts or advice is appreciated!