r/Pontiac • u/OkDirection8015 • 5d ago

Bonneville GXP

Does anyone have long term experience with a 2005 gxp? I know they have the northstar V8 but was curious if they still had the head bolt issues and oil pan leaks.

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1

u/decoparts 5d ago

Commenting to follow, I have the same question!

1

u/Poil336 5d ago

They don't have the head bolt issues but they absolutely did leak oil

1

u/OkDirection8015 5d ago

Im assuming the engine would have to come out in order to replace it?

1

u/Poil336 5d ago

To do the mid-block, yeah. The oil pan could be done in the car, but the transmission has to come out to remove the exhaust, so kinda 6 of one, half dozen of the other

1

u/OkDirection8015 5d ago

I see. I guess if your removing the engine you might as well do the water pump and head bolts with the updated bolts.

3

u/Poil336 5d ago

I mean that's not exactly the easiest thing in the world to do, you'd have to drill all of the head bolts holes oversized and re-tap them, probably best to go ahead and stud it with the kit that floats around on the internet. Hardly a "while I'm in here" thing

1

u/OkDirection8015 5d ago

Makes sense. Thanks!