: Engine Replacement



scporter
04-06-06, 01:34 PM
I have a blown head gasket on my 1996 STS, 130K miles.

I can replace the head gaskets or install a complete used engine.

I found a SLS ("Y") engine that has low miles for $500.

I am capable of doing the head gasket replacement but was wondering what the experts think. Any issues on replacing a 9 engine with a Y.

Thanks.



Scott

CadillacSTS42005
04-06-06, 02:11 PM
cant be done youll blow that engine up better off finding a 9 or doin the heads

Patrick7997
04-06-06, 03:37 PM
CadillacETC1997 is right... you need a vin "9" engine....

ELDOminator
04-06-06, 04:37 PM
Unless you get your computer reflashed with the "Y" engine specs, right?

Ranger
04-06-06, 05:21 PM
I don't know about blowing the engine up, but you'll have the wrong PCM & trans and they don't play well together. Even if you change the PCM & trans, the two engines have different intake cams. Stick with a VIN 9 engine.

zonie77
04-06-06, 05:34 PM
The SLS engine is tuned (cam grind) for bottom end power. STS for top end. They get differeent gearing, the STS has lower gears (more rpm @ any speed).

You can bolt them together and they will work, but you may or may not be happy with the results. You will have more bottom end power, less @ 5000rpm. If you live in the city and do 99% of your driving uner 50 you might be very happy. If it's suburban still OK. The shift points will seem a little high.

The other way doesn't work well at all. With higher gearing and less low RPM power you would be very unhappy.

Our old member didn't recommend mixing them either way but if it's 99% city I think you'd have an interesting car.

scporter
04-06-06, 08:07 PM
Thanks for the engine replacement advice. I will replace the head gaskets.

scporter
04-06-06, 08:08 PM
Thanks for the engine replacement advice.

I think I will replace the head gaskets on my existing motor.

Regards,


Scott

zonie77
04-06-06, 10:09 PM
Did you look in tech tips, the head gasket thread?

scporter
04-07-06, 08:08 PM
I hadn't but since you asked I did and can't find it. Do you have a link?

Thanks.

Scott

scporter
04-07-06, 08:30 PM
I did see the N* Head Gasket Repair posted by Zonie77 in Tech Tips if that is what you are refering to.

It would be great if some one would do a "How To Drop the Cradle" and post it in Tech Tips with pictures like the Strut replacement post.

I don't have a digital camera or I would try, all I have is a camera phone.

Regards,

Scott

zonie77
04-07-06, 11:13 PM
The dropping the cradle is straightforward. Disconnect everything and drop the cradle! LOL!!!

I felt about the same when I looked at it the first time. It wasn't that bad. My brother dropped the cradle part way to replace his blower fan. Once you do it, it's nothing.

Ranger
04-07-06, 11:20 PM
I felt about the same when I looked at it the first time. It wasn't that bad. Once you do it, it's nothing.
Zonie,
They say the same thing about bungie jumping.

zonie77
04-08-06, 12:12 PM
Zonie,
They say the same thing about bungie jumping.

I think I'll stick to dropping cradles!! I don't like heights.

Zorb750
04-08-06, 02:18 PM
You could take the replacement engine and swap the cams with yours.

Ranger
04-08-06, 05:20 PM
I think I'll stick to dropping cradles!! I don't like heights.
Roger that!