I love my northstar motors..just keep the oil.changed and dont let.it run hot..youll.get long lives out of the 4.6
Regardless of maintenance, HG issues can occur at 10K, 50K, 100K, 250K, or never. There is NO age or mileage at which they "go out". If someone tells you that, they're either misinformed, or lying.Originally Posted by jojostar25
The number of engines with HG issues is MUCH smaller than the number of engines with no HG issues.
As for not letting it run hot, that's not recommended for any engine. But FWIW, the Northstars' "camel mode" will allow you to drive the car for 50 miles, with NO COOLANT, for 50 miles, with no damage.
I guess you just have to be lucky to have one without those issues.
What you said, have truth to it that it can occur at anytime.
I seen a few 4.5 and 4.9 with blown headgaskets but the numbers are small.
I guess it all depends in the end.
There are many members on here (which represent an EXTREMELY small percentage of Northstar powered cars) who have high mileage cars with no HG issues. One member (DrivenDeville) has over 600K.
Other than oil seepage, and the exaggerated HG issue, Northstars are pretty bulletproof. Cost of repair is higher, not frequency of problems.
My first Northstar ('97 SLS) developed HG issues at ~67K. The original engine in my '01 cracked a head (which is unheard of) at ~74K (IIRC), and was damaged while being studed. The replacement was studded and resealed I think almost 2 years ago now, and has only needed CKP sensors and a MAP sensor so far. The rest of the car, by comparison, has required much more maintenance and repair.Originally Posted by jojostar25
But yes, great engine, and great car overall. Spent about 2 hours yesterday just driving, highway and rural twisties.
For the average person' looking for a comfortable cruiser, I'd recommend a '94/'95 Deville (non Concours).
If the engine is a concern for you, only '92 and '93 SLSs have the 4.9.
I will run into a Northstar powered SLS before a 4.9 in that year. I rarely see those on the street.
just want to be wise in what i choose right now. But, from all the awesome feedback on here
i guess the 94-95 Deville win by far. As much i love the styling of the SLS.
To get my hands on a diamond pearl and fully loaded will be bad ass.
But who knows i can find one with low miles and a great maintenance history
I may have to reconsider and get it.
Personally, between an older SLS and Deville, I'd buy the Deville.