Hello Everyone
My 1991 740 non turbo's radiator cracked where it meets
the return coolant hose. I first discovered the problem
when I saw coolant all along the side of the radiator.
I loosened the hose to remove what looked like gunk that
would have let coolant seep through. It turns out that
the extruding pipe of the radiator cracked off inside the
rubber hose, and now there is nothing left to tighten the
hose around. What should I do? Do I need a whole new
radiator? Thanks for all the help in the past. Hope there
is help for this problem too.

Jon S.

Plastic tanks can actually be replaced. See Google under "plastic radiator tanks". Whether it is economical or not depends on the price of the radiator. Probably not worth it on a Volvo if you can get replacement for $119 but when radiators cost $3-400 it is a different story. The weight difference could also be an issue if you race or otherwise want lowest weight.

Here is what you'll need!
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2410884636&category=6768
All metal 3 row copper radiator $119.50 w/free shipping. I plan on getting one of these for the 760 this month. BTW I am not affiliated nor do I work for Eeuroparts.com.
--
1988 760Tic - 155,550 1966 M-B 230 sedan - 98,000 - Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us. - Bill Watterson

Yep... It it looks like cheap thin plastic to me.
Thanks for the responses. Ill look into the metal
ones, i dont want this happening again.

The heavy duty 3 row will help in hot weather as well. I had one on my old 740T and the car never overheated. I had a leak in the previous plastic/aluminum radiator and had to fill the system with water. A Motorists Assistance truck stopped to help me and the guy said he gets a lot of radiator problems.

Basically, you can get 10 yrs or 100,000 miles out of them. The upper neck gets brittle from the hot water and breaks.

Good Luck.
--
Warren Bain - '99 V70GLT G-Valve > 70K mi, '96 965 >110Kmi Wifemobile near Manassas Va.. Check the 700/900 FAQ via the 'features' pull down menu.

is the broken piece plastic? I have an 89' 740 turbo , the plastic piece on my radiator cracked by a mechanic that made the hose clamp too tight, long story short, the rib on the end of the plastec piece wasent there to hold the hose so it blew off one day, overheated and blew the motor.

The plastic tank outlet (or inlet) has cracked. You'll need a new radiator, I'd go with an all metal one. Good luck.

Yes, you do. Get a new 3 row one from ... I think FCPGroton will have it. There's a little debate as to whether to get an all metal one or a plastic one. I would get a plastic one personally.

Oh, and I'm sure you know this already, but absolutely do not attempt to drive your car in its current state.
--
Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'

Ah. Another question.. I checked my
radiator coolant overflow thank and
I heard the pressure of air escape and
I drove more than 20 hours ago. Is
that supposed to be? Id imagine such
constant pressure would stress a few
parts. Is that cap supposed to release
it after awhile?

Thanks

the cap is designed to release pressure when it gets to a certain amount, and what that amount is depends on the color of the cap. i believe people have been recommending that folks put a green cap on their tank, which is a lower pressure rating, thus reducing the stress on the cooling system overall.

i don't know if there's supposed to be a whoosh of air when you remove the cap 20 hours later. personally, i never get the woosh.

also, when you replace the radiator, make sure you get new hoses for EVERYTHING while you're at it. it might cost more now, but it's safer in the longer run than if you wait till something happens. also examine your expansion tank right now for signs of weakness and damage.

as to the reasons why i recommended a plastic one, there is a 2 row nissens radiator around for volvos that is supposed to be a newer design than the all metal copper 3 row nissens.

i know newer is not necessarily better, but i would prefer 1) a lighter radiator 2) to stick with something that is closer to original volvo spec.

but of course it's up to you. :-)
--
Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'

Thankyou everyone for you responses.
Ill look into the newer plastic radiators,
they would probably be cheaper anyways.
Ill also pick up one of those green caps.

Thanks Again, Jon.

make sure i'm right though, i can't remember if it's green or black/grey cap that is the lower pressure rating.
--
Kenric Tam
1990 Volvo 740 base sedan (B230F)
My Volvo 'Project'

I haven't gotten a woosh out of the overflow tank 20 hours later but I do get one if I remove the cap 2-3 hours later.
--
1988 760Tic - 155,550 1966 M-B 230 sedan - 98,000 - Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us. - Bill Watterson