Can you tell me " Who" makes the 4.9 liter engine ?
How many horse power it has in stock form ?
What improvements can be done to enhance performance ?
What is the average gas mileage of this engine ?
What Caddy's can they be found in ?
And last what are the strong points,,, AND,, weak points of this motor ?
I am still learning ,, I use to be with Chevy,, switched to Ford,,,Crown Vic's,, so I am use to a big car, but I want something that has performance and trust worthy ,,,but looking to come back to GM products !!
I believe Cadillac makes the engine as it is only used by them, but I could be wrong.
Stock, its rated at 200HP@ 4100RPM and 275lb-ft @ 3000RPM.
Not much in terms of performance mods. I know of k&n air filter and a chip.
Mileage is rated at 16 city / 25MPG hiway.
They are found in 91-95 Devilles (Not the 94-95 Concours though),
91-93 FWD Fleetwoods and 60 Specials, and 91-93 Sevilles and Eldorados (Not the 93 Touring models though).
Some strong points are its fairly good reliability and good low end power. There are some threads about the miles these motors have been able to rack up.
Some weaker points are its thirst for premium, and some people experience a rough idle.
I'm sure there are more points about the engine. Hopefully others will chime in on them. Also, check out the pushrod forum for some more info.
To answer your question about manufacturer, just look under your hood! Give the air cleaner a read!
"4.9 Litre Made Exclusively by Cadillac"
actually, it's "made exclusively for Cadillac by General Motots" so it is made by GM (duh) but for Cadillac. the only other 4.9 300cid engine I know about is the Ford, but that is a stright-6 ( a big one at that) used in earl-mid 80's Broncos and I guess some trucks.
__________________ ~ Rick
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~1994 Isuzu Amigo - Everything but roadtrips (unless trailer is in tow)
~1996 Lincoln Town Car Signature Series - The roadtrip machine AKA "Mafia Mobile"
there was a GM 301 or 4.9 in the late 70s , these were fitted with turbos and placed int he "turbo trans am " but the bore and stroke are completely diffrent , only a handfull of engines in cadillacs werent devolped by cadillac :
the 350 diesel caddy : desinged and built by oldsmolbile and detroit diesel used int he early 80s
catera : opel engine with some cadillac massageing
2nd gen esclade , 6 litre gm truck engine also given some attention by cadillac
the 4.9 is a odd ball engine for GM , aluminum block with iron heads , only used in transverse mounted fwd caddys
I get better mileage than 16 and 25. I'm getting easily 19 or 20 city (is my computer wrong?) and up to 35 on a flat highway with the cruise on. I could not be more happier with the gas mileage, however, the cost of premium is another thing! I have a slight rough idle, but that may be the plugs. There are knowledgable tech people on this forum, and the 4.9 has been called the "best engine Cadillac ever made!" I agree!
I get better mileage than 16 and 25. I'm getting easily 19 or 20 city (is my computer wrong?) and up to 35 on a flat highway with the cruise on. I could not be more happier with the gas mileage, however, the cost of premium is another thing! I have a slight rough idle, but that may be the plugs. There are knowledgable tech people on this forum, and the 4.9 has been called the "best engine Cadillac ever made!" I agree!
About your milage. You have to consider in ALOT of things that would have an effect on your milage. What is the terain like where you live. Is there a lot of hills or is it flat. Better gas milage when its flat. What type of gas do you run? Do you beat the shit out of your car? Do you use cruise control? City? How often do you start and stop. How many lights do you wait at? I have gotten 13 mpg in philly with careful driving traffic sucked then also when going other places i have gotten as high as 30ish.
About your milage. You have to consider in ALOT of things that would have an effect on your milage. What is the terain like where you live. Is there a lot of hills or is it flat. Better gas milage when its flat. What type of gas do you run? Do you beat the shit out of your car? Do you use cruise control? City? How often do you start and stop. How many lights do you wait at? I have gotten 13 mpg in philly with careful driving traffic sucked then also when going other places i have gotten as high as 30ish.
I've gotten no more than 22 highway and i'm kinda pissed off. I've been chasing the reason why I get such piss-poor gas mileage and I've nailed it down to either the fuel injectors or the EGR system.
in the summer, around town with more 45-55mph driving, AC on, or windows down I get 18-19mpg, this time of year (cold, shorter distance, not as long, run heat etc..) it is down to 16-17..... when I went up to Albany, I had the sruice set at 72 and AC on and was getting 27mpg, if I set it to 76 or so, I think I may be able to break 30.......
overall, I am happy with the millage of my car, I do have a rough idel, but most 4.9's do, other that that, so far it has been a good engine....just want even more power
4.9 liter question 
