4.6L northstar engine Pontiac Bonneville Gxp
#21
Junior Member
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The Northstar is a GREAT engine. They do have some issues, all can be fixed. Bottom ends are very strong and durable. Head gaskets and head bolts tend to fail.
At the end of the day, I wouldn't have any other engine. If a larger one was made (say a 5.7L, much like the LT5 vette engine) I'd want it in my truck. Great engine for a car, that'* for sure. High winding, responsive, efficient and smooth.
-Jake
At the end of the day, I wouldn't have any other engine. If a larger one was made (say a 5.7L, much like the LT5 vette engine) I'd want it in my truck. Great engine for a car, that'* for sure. High winding, responsive, efficient and smooth.
-Jake
#22
Senior Member
True Car Nut
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I see... looks like the problem
that was the difference between my truck and yours, mine was back to the dealer only once for the first oil change and they add a few missing options. Never had any of the flashes done, did not need them! After that I did all maintenance and the few minor repairs. Still running and hauling like new at 160K miles. One only needs to follow the owners manual service intervals and use syn oil![clap2](https://www.gmforum.com/gm/images/smilies/854d1243097187-12v_clap.gif)
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#23
Senior Member
Posts like a Turbo
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What appears to happen the head gaskets start to leak then in some cases they leak coolant into the combustion chamber and because water wont compress they rip the threads out of the block
O there is a fix called timserts were you drill the block and tap it out bigger
and tread in a insert with threads on out side and inside
best left up to a machine shop on a bare block
And who is to say it wont happen again
Lets just say the aluminum in a beer can is better quality then
the block is made of
Did we say anything about were you have to remove the engine to get the heads off
or the oil pan in the sub block
And lets not forget when your wife calls you saying the starter is dead
and you think {no big deal I will change it at her work right!!}
GM'* idea was {hey how can we screw every one from working on this more then we all ready have}
I know we can put the starter under the intake manifold
the only people that still have one soon finds out there life savings are gone
paying some one to fix it
O there is a fix called timserts were you drill the block and tap it out bigger
and tread in a insert with threads on out side and inside
best left up to a machine shop on a bare block
And who is to say it wont happen again
Lets just say the aluminum in a beer can is better quality then
the block is made of
Did we say anything about were you have to remove the engine to get the heads off
or the oil pan in the sub block
And lets not forget when your wife calls you saying the starter is dead
and you think {no big deal I will change it at her work right!!}
GM'* idea was {hey how can we screw every one from working on this more then we all ready have}
I know we can put the starter under the intake manifold
the only people that still have one soon finds out there life savings are gone
paying some one to fix it
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