| Author | Message | ||
| BretM (Bretm)
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Correct cap is .9 bar or 12.8 lbs. The 1.1 just means it wont boil over until a few degress hotter. It shouldn't really do anything cause it's not a big difference. | ||
| stu cordova (Balataboy)
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The dealership didn't give me a choice when I bought mine. They sold me a 1,1 bar cap even though my old cap was a 0.9. Question; What exactly does this difference mean to the system itself and which is the correct cap for an '85 308? | ||
| Mitchel DeFrancis (4re308)
|
Peter, I was just at Ferrari of Atlanta, and Ken asked me if I wanted a 1.1 bar or the 0.9 bar. So they must be available! I got a 1.1 bar. I can get you the 0.9 bar if you want!? Or you can call Ferrari Of Atlanta at 770-939-5464 and ask for Ken in parts. | ||
| '75 308 GT4 (Peter)
|
Everybody, including myself, have been getting 1.1 bar caps. It looks like that these are the only ones avaliable (unless someone out there knows of a place still carrying the 0.9 bar caps?). These 1.1 bar caps look a lot like the ones used in Fiats and Lancias. | ||
| Mitchel DeFrancis (4re308)
|
I'm going today to get a new radiator cap and a water pump belt from Ferrari of Atlanta. I am yanking the radiator out tonight to be recored. I am pretty sure that the combination of a bad radiator cap, and a rediced capacity radiator itself, is giving me my hot running conditions. So I should get a 16 pound (or 1.1 bar) pressure cap? I already have some water wetter. | ||
| Low Kai Chin (Speeddemon)
|
There are a number of powder-based sealants in the market that works really well for very small leaks. Had no adverse effects in using them as well, although I have never used them on my ferrari. My opinion is that you should try to see if the leak can instead be welded. On the ferrari quick fixes like these are not worth the risks if you fry your engine! | ||
| Eric de Back (Eric328)
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I found a very small leak in my radiator yesterday. Does any one have any experience or advice about radiator sealants that you add to your coolant? Eric | ||
| stu cordova (Balataboy)
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Steve, thanks - it looks like I bought the right cap. BTW, Is it my imagination, or are there a LOT of posts about overheating and coolant issues here lately? Maybe it's normal for these cars to "heat-up" during the summer, but it just seems like a lot of us are having cooling issues. Coincidence? | ||
| Steve Magnusson (91tr)
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stu -- 1 bar = 14.5038 lbs/in^2, so 1.1 bar = ~16 lbs/in^2 (Most of the world uses a numbering convention where the comma is the decimal point and the period is used as the 3-digit separator. For example, in the US we use 1,234.56 while most elsewhere this is shown as 1.234,56 -- so 1,1 in this case means 1.1) | ||
| stu cordova (Balataboy)
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Just bought a new cap from Ferrari and on the cap it reads "1,1 bar". What does this mean? Thanks | ||
| kelly vince (Tofosi1)
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#1 check the cap, mine is a 16 pounder. #2 If #1 does not work, make sure all of the air is out of the system. Bleed both points front and motor, then add water to the tank. Always add a little more than normal, the car will spit out what ever it does not want. #3 If you find the car just totally dumping a lot of collant after that, then replace your thermosat. What is happening is the the thermostat is getting stuck in the close postion, when it open all the overheated water comes out, pops the cap and dumps on the ground. You should notice and increase in temp, right before this happens. Just my opinion, I had the same problem. Mine was collant level. I did not have enough. | ||
| Herbert Edward Gault (Irfgt)
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The pound or bar rating on the cap is the pressure rating that the cap will release excess pressure at. If your cap is releasing pressure and the temperature is high then the cap is probably doing it's job. | ||
| Mitchel DeFrancis (4re308)
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Hey guys, expecially Eric, this is exactly what my 308 Qv is doing. I yanked the water pump off and sent it to Nick Scianna, who told me the pump is fine. Can a bad tank cap cause the car to run hot? After I take it for a drive, the car makes those hissing and groaning sounds, shoots coolant out and I do hear gurgling sounds coming from the expansion/overflow tank....and I do hear air being released...as if the cap is letting air out or in??? Coincidence??? I think not. I think I might have a blocked radiator, or a bad tank cap. I'm going today to get a new tank cap. | ||
| '75 308 GT4 (Peter)
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Stu, it could be the fix. Just sitting here and thinking about this... could the valve in the cap be binding and only releasing when the pressure in the system is high, to blow past that resistance? Just a wild thought... I think I'll go feel for myself with my cap and tank. | ||
| stu cordova (Balataboy)
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I just did the 30K service which included a NEW water pump, so it shouldn't be a pump issue. The main reason I'm concerned is that it has never done this before, even after being run much harder than I did on this particular day. I've never lost coolant before and I never fill up the reservoir. Also, it hasn't done it since and it's not running hot - at least according to the temp gauge. So, not being sure what to do next, I think I'll replace the reservoir cap and do nothing more until something else unusual occurs. Thanks guys! | ||
| Joe Baker (Joeferrari)
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I have a 1986 3.2 Qv Mondial, and it appears that they are very sensitive to header tank levels, if I were you I would set the level exact to specs( in handbook), and if your car does not run hot, I should replace the header tank cap with a new one, as the pressure value may have dropped off or the rubber seal may leak under pressure, always look for the simplest. If the car runs hot it is a far more serious prob,which I won't scare you with.I assume the car is not leaking from anywhere else. | ||
| Eric de Back (Eric328)
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Stu, I would be worried if I were you. I had a similar problem on my 89 328GTS where it would appear to be normal but any time I stressed the engine my car would heat up and evetually blow out clouds of steam from the coolant overflow tube and make diabolical groaning and hissing noises (kinda of like in the Exorcist  . The diagnosis in the end was that I was losing coolant through the water pump (but only under driving conditions which doesn't apply to you). Less & less coolant = overheating. Now, with a rebuilt waterpump, my car is fine, under load and in the garage. To me this means the car shouldn't lose coolant at all. The only time would it will do so is if you have overfilled the coolant system like Herbert mentioned. Are you filling your car up with coolant a lot? Eric | ||
| Herbert E. Gault (Irfgt)
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If your expansion tank was overfilled then the system will puke the excess out. The tank should be about half full or for you pessimists half empty. | ||
| stu cordova (Balataboy)
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I've read lots of posts about coolant issues - but I'm still wondering if I should be concerned. Got home tonight from a short half hour trip, temp gauge showing normal, pulled into the garage, turned off the motor, and heard a sound I never heard before (kind of like a pressure release sound). Got out and noticed a fairly large puddle of antifreeze on the ground. Not sure, but it looks like it came from the overflow tube. I've driven the car a lot harder and it's gotten a lot hotter but it's never done anything like this before and always runs at a perfect temp. No big deal...or should I be worried? Thanks, in advance. |