New Heads = No Comperession
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Joined: Feb 2020
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From: Beaverton, OR
New Heads = No Comperession
Hey - New user here and looking for some help
I have a 2000 Ford Ranger 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? I am looking into whether the heads are correct by cross-referencing the casting # on block w/ parts supplier and am awaiting a call from them; bought all parts from Rock Auto.
I have a 2000 Ford Ranger 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? I am looking into whether the heads are correct by cross-referencing the casting # on block w/ parts supplier and am awaiting a call from them; bought all parts from Rock Auto.
If you are looking for a wider range of responses, join this forum, https://www.therangerstation.com/forums/index.php
Been on both for alot of years but haven't come across your specific issue, maybe someone else has
Been on both for alot of years but haven't come across your specific issue, maybe someone else has
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