thanks for the replies, wow jagtoes that sounds like a very costly venture as is a lot of work. For now I think I am going to leave it the way it is since I am thinking about buying a 850 turbo and do not want to put a bunch of money into my 740, the ac works so at least its better than nada.

 

bump, just wondering if anyone knows approx how much r12 to buy. Found a guy near me that is selling it cheap. I'd like to know how much to get from him.

 

Crap, I've got r12 coming out of my ears. 30 lb. cylinders. My pops was an HVAC tech for Sears back when r12 was used. Willing to sell, PM for details.

 

odd, I'm selling my 850 turbo and putting a bunch of money into my 740. hah.

850 cons: crappy harsh ride yet doesn't handle that great. rattles and squeaks all over the car on rough roads. lousy ground clearance. lousy turning radius. cramped interior. expensive to repair engine. too easy to spin front wheels.

 

Well it's my wife's 1st and only new car. She has 315K miles on it and wants to hit 1M. It looks good and runs OK so we just keep it going. As to cost I guess it is relative. A few hundred to fix it is a cheap investment to keep her happy.

 

And this my friends, is priceless. LMAO!

 

Hmm maybe I should rethink this strategy, What 740 comes with 16 Valve turbo factory

 

Well if there is one thing for certain you have to keep the wife happy. LOL

 

Canadian, Gonna jump in here.

I know here, we have a product called RED-TEK. It's dirt cheap, and acts as a suitable R12 and R134A substitute, however it doesnt last as long as either (Maybe a year, tops). If your system is completly empty, even a novice can fill it.

It might be worth a shot.



Ignore the 'Just empty your system' comment. I wouldnt recommend 'just' doing that haha.

 

none. the 16V motors were non-turbo. afaik, the B234F 16V DOHC motor only came on 940's, starting in 92 or 93 (but someone will probably correct me[1]). The turbos were all b230ft, which are SOHC 8 valves. Note that the 740 and 940 are almost identical cars. The 940 sedan has a taller trunk lid and a higher rear seat back. The wagons are spitting images of each other, especailly the last 2 years of the 740 that overlapped with the 940. IMHO, the optimal car is a 94/95 940T wagon, as that engine has some internal improvements including oil squirters (and I'm a wagon-head).

I've heard of folks retrofitting B230FT turbos with the 16V head, but I think there's more low hanging fruit to get more power (see the stickies in this forum, and on turbobricks). But, frankly, its powerful enough for me as-is.

the 16V head has a downside, its an interference engine, if you ever break a timing belt, you'll almost for sure bend/break valves. Also, the 16V develops its horsepower at a higher RPM, so is normally mated with a lower gearbox.



[1] ok, I'll correct myself. VADIS lists the 89 and 90 740 as having the B234F as an option. It was not available on the 91-92 740, just on the 91-92 940, and not at all on the 93-95 940. In fact, a 91-92 940 non-turbo just about has to be a 16V according to what I'm seeing. Note, this is purely for US models, in other countries there were undoubtedly other options.

 

wow thats alot of info so If i want turbo in a 4 door I should go with an 8 Valve 740 GLE correct?

 

I'm pretty sure if a 740 has a turbo, its called a 740 Turbo. only on the later 940s did they put turbos in models that didn't say turbo on the back.

By the time my 92 wagon was made, they dropped the GL/GLE stuff and it JUST says 740 Turbo on it. in 91/92, the 740s were more of a base model, while the 940s were a little more upscale, for instance, my 740 has no cruise control, it has manual a/c controls, it has manual seats, however it does have a sunroof and leather (both were optional).



a sedan is really a 744 or 944, (and a wagon is a 745 or 945) but they didn't put that on the back of them, only on the serial number plate under the hood.

early 740 sedan



later 740 sedan (note the different lights)


940 sedan (note the taller, rounded trunk line)



other than the cosmetic differences, the chassis was basically the same, later years had incremental engineering improvements.

 

Very Interesting my 90 740 is a GL and it has leather and a sunroof(that dosent work) but also manual seats and no cruise No cruise but leather heated seats go figure