: Areas to look at while doing a HG repair



68Futura
12-14-11, 05:00 PM
Hey guys, I know if I sift through these threads I should be able to find the answers. I know there are no easy answers, but all I ask for are simple answers.
I have my northstar out of the car for a HG repair (hopefully with Jakes studs) that I plan to do myself. The engine has 107K miles on it. Im not trying to build a performer, just want to enjoy more summers with the car.
What else should I be looking at while its out? Common problems/issues? Things I should do just because? I dont want to bother anyone too much, but Id appreciate any input, but. Thanks!

maeng9981
12-14-11, 06:06 PM
If only the HG is bad then only do repairs on the top half. Bottom half of a Northstar is near bulletproof. Unless you are trying to fix a halfcase leak (if you have one), you don't have to touch anything in the bottom.

Inspect for cracked blocks. Not common but needs to be inspected when it's out.
Inspect for worn flat tappet lifters and cams. If worn they need to be replaced.


Once you get the HG fixed then the engine should outlast the car.

89falcon
12-14-11, 07:13 PM
If only the HG is bad then only do repairs on the top half. Bottom half of a Northstar is near bulletproof. Unless you are trying to fix a halfcase leak (if you have one), you don't have to touch anything in the bottom.

Inspect for cracked blocks. Not common but needs to be inspected when it's out.
Inspect for worn flat tappet lifters and cams. If worn they need to be replaced.


Once you get the HG fixed then the engine should outlast the car.

With a 98, I'm willing to bet he has a halfcase leak.....

even if you are fixing a halfcase leak, DON'T TOUCH THE ROD BOLTS!!! You might also consider replacing the rear oil seal if it's leaking....they often do....you need a special tool to do it...but there are usually a couple on ebay.

Also, replace the front crank bolt...they tend to break the second time around. Inspect the cam chain guides....but they usually last 200K+

Ranger
12-14-11, 11:04 PM
Although it seems to be more of a 2000+ issue, you might want to consider the TCC solenoid and TC. Here's some info for your viewing pleasure.
http://www.cadillacforums.com/forums/northstar-performance-technical-discussion/149834-information-p0741-p1860-1998-a.html