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Old 03-31-2019, 10:11 AM
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97roughneck 97roughneck is offline
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Default 4.6 Cadillac V8

I've been snooping around the internet looking for reviews, good or bad on the 4.6 V8 in mid 2000's Cadillacs.

These cars can be bought fairly cheaply in AZ with 100K on the clock. I'd like to buy a car down there and leave it at our winter home, rather than buy up here and take it down. Plus, not many Cad's up here compared to AZ. They're like dog's hair down there.

So would I be buying a problem? I have had good luck with the 3.6 in my CTS.

Appreciate any first hand reports.
"On the plains of hesitation lie the bones of millions."
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Old 03-31-2019, 01:15 PM
jfishpa jfishpa is offline
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Location: Pittsburgh , PA
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Default Caddy 4.6

I would check the head gaskets ,seemed to be the biggest issue. The 4.6 is known as the Northstar google it and lots of info out there.
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Old 03-31-2019, 09:08 PM
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Head gaskets, trannies and comfort control system (ac, heat and vent controls and operation ) are the biggies to watch out for.
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Old 04-01-2019, 04:55 AM
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Bobby Winds Bobby Winds is online now
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Old 04-01-2019, 01:04 PM
chysteve chysteve is offline
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Location: Cheyenne Wyoming
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I had a 4.6 in a 2001 STS. P.O.S. burned oil, trunk leaked bad. Won't ever consider a Cadillac again.
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Old 04-01-2019, 06:39 PM
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97roughneck 97roughneck is offline
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Having done even more research in the past few days, I think I'll stop looking for a 4.6. It seems they're either really good or really bad. Could go either way.

And who wants to take a $8000 gamble? Not me
"On the plains of hesitation lie the bones of millions."
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Old 04-02-2019, 12:30 AM
Anonymouse Anonymouse is offline
Join Date: Jun 2010
Posts: 192

Buick LeSabre or Park Avenue rides just as smooth as a Caddy, costs far less, and the 3.8L is one of the best engines Detroit ever designed.
Put 265,000 on the 1993 LeSabre and it STILL didn't use a drop of oil when the front frame bolts rusted through and dropped the engine & tranny in the street in the middle of a busy intersection during rush hour.
Little hairy for the wife (it was her ride) but she coasted right into the service station of a friend of Anonymouse's that happened to be at that intersection.

GM had a recall on those bolts but for some reason they skipped right over 1993, while recalling up to 1992 and continuing with 1994 & beyond.
Go figger.
Anyhoo, the damage was actually quite minimal.
All that really got messed up was the driver's airbag wiring, because Anonymouse overturned the then semi-disconnected steering wheel (front wheel drive) when trying to manuever the car in the lot & tore the electrical circuit tape that feeds the airbag.

Back on point, why a Caddy, when Buick makes such wonderfully dependable machines?
Honestly, test drive one and see if Anonymouse isn't telling it straight.
We slept in the LeSabre's leather seats multiple times, on long drives - and even after 16 hours of driving Anonymouse was never stiff or sore.

Dreamy ride, 35 mpg on the highway/28 mpg in town, no repairs to speak of in a decade (it was already 7 years old when WE got it), all the toys of a Caddy to boot for half the cost, used, & enough pep in the 3.8L to get out of it's own way, any time, any place.

Last edited by Anonymouse; 04-02-2019 at 12:34 AM.
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Old 04-02-2019, 08:43 AM
Tx Jig tyr Tx Jig tyr is offline
Join Date: May 2009
Location: Texas
Posts: 34
Default 4.6 and oil leaks

That engine uses a two piece crank case with a "manifold" that is used as a gasket to seal the two pieces. The problem after about 40,000 miles they leak, because of expansion and contraction problems. That is an engine out repair if it is done they way Cadillac wanted it done. Would be over $2,000.00 repair. Also expect to do it again in another 40,000 miles. If you want an older cadillac, get one with the 4.9 engine 94 and earlier and regular '95 sedan devilles, not the touring models.
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