: 96' Seville HG Problems.. :-(



sofireguy
10-29-08, 12:19 AM
Well.. One of the rear head gaskets went on my 4.6L Northstar. Blah.. Probably going to swap another motor in it while I work on the Heads and block on the down one. I love my Cadillac too much to see it sit and collect dust/pollen.

Are there any Online Service Manuals that will help me with the swap, like the electrical and disconnecting certain main parts to dismount the Cradle from the Chassis?? Any pointers for my Head/block job for later? I've never done an engine swap quite like this one.. he he.. I don't have a Corvette or funny car. Just my Caddy ^_^. Any help is well appreciated.

Krashed989
10-29-08, 01:39 AM
Pointers:
1. Have a heavy duty dolly ready (that can support the whole drivetrain). I still owe my dad a new handtruck. LOL pic (http://i29.photobucket.com/albums/c296/Krashed989/100_1245.jpg)
2. Have a box of band-aids ready for when you try to feed the wiring harness (from the PCM) through the firewall. My little 9 year old sister helped a lot with doing that on mine.
That's all for now.... Just remember to be organized. It's not good to end up with extra parts afterward. lol

As for a manual, I would buy the Factory Service Manual from Helm. You can usually get them on Ebay. Or you could order it directly from them http://helminc.com/helm/homepage.asp?r=

More pics:
http://i29.photobucket.com/albums/c296/Krashed989/100_1244.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1247.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1242.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1241.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1240.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1248.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1249.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1251.jpg
http://i29.photobucket.com/albums/c296/Krashed989/100_1252.jpg

sofireguy
10-29-08, 09:07 AM
Wow... Very nice job sir. Look Great. How much time did it take you?? I don't have a driveway like that so not much concrete space for me to work. So mounting/dismounting the tranny isn't hard?? Did you use a Manual for the most part?? If you did was it fairly self explanatory? And where did you get the paint to paint those heads, thats unique!

Edit: and was that a regular old cherry picker or was that a special hydraulic jack for lifting the body of the Caddy up? Did you have to go about 5-6 feet with it??

sofireguy
10-29-08, 01:48 PM
Will a regular 2ton engine hoist be good enough to pull the front end of the Seville enough to drop the cradle?? Or do i need something else for the height I need to get it?

Submariner409
10-29-08, 03:20 PM
A 2-ton or 3-ton cherrypicker hoist is fine. Ease the strain on the lift by putting the body front jacking points on jackstands after you roll the cradle/suspension away. (Chock the rear wheels then)

zonie77
10-30-08, 12:39 AM
Here's a write up I did.

http://www.cadillacforums.com/forums/northstar-performance-technical-discussion/5052-n-head-gasket-repair-part-i.html

Tateos had a long thread when he did his HG's a few months ago. There are several other threads with tips and pics. A factory manual is very valuable. Get a used one from ebay.

The body is surprisingly light without the cradle. A 2 ton hoist is plenty.

sofireguy
10-30-08, 09:13 AM
So what setting did you have yours at in that picture?? I saw that it was extended? I just picked up a 2ton for $100 and it has extensions and ratings of safe weight on each setting. 4000, 3000, 2000, and 1000 lbs.

But my idea is to replace this engine with a used one from another car and then do a HG job on this one I have and keep it as a back-up engine. And go back and fourth with them because it is pretty much inevitable that I will have another HG blow.

sofireguy
10-30-08, 09:47 AM
Bad news.... I was reading around the forums. Last time I checked my oil in the Northstar, there was quite a lot of coolant in the oil. Does this mean that my block is shot?

zonie77
10-30-08, 01:56 PM
If you have been driving with bad HG's eventually you will get coolant in the oil. How long and how much pretty much determines how bad the damage.

The bearings get ruined, not the block.

There is the very small possibility you have a cracked block. That is very rare though. More likely you have driven it with a bad HG for a long time.

Krashed989
11-01-08, 04:48 PM
Wow... Very nice job sir. Look Great. How much time did it take you?? I don't have a driveway like that so not much concrete space for me to work. So mounting/dismounting the tranny isn't hard?? Did you use a Manual for the most part?? If you did was it fairly self explanatory? And where did you get the paint to paint those heads, thats unique!

Edit: and was that a regular old cherry picker or was that a special hydraulic jack for lifting the body of the Caddy up? Did you have to go about 5-6 feet with it??

Sorry I didn't get back to you for a while... didnt realize that the thread had moved. lol. That's a regular 2 ton cherry picker on it's highest setting for weight. It was able to lift the car more than enough. The exhaust was on the ground before I decided I had enough clearance. It took me 2 and a half weeks, while also working my 2 jobs. Although I've done similar jobs at work so I was kinda familliar with the process (Never with a northstar though). The hardest part of wheeling the drivetrain out was figuring out how to support the car in the fully raised position. It was at such an awkward angle and so high up that it was pretty difficult. Just remember not to use cinderblocks because they will crumble under the weight of the car.

I recommend the helm manual for 3 reasons
1. Its the original Factory Service Manual
2. It's more complete than any other manual you will find
3. It's based on a complete tear down and overhaul of the engine, (and the whole car for that matter. lol).