| Author | Message | ||
| Don McCormick (Dandy_don)
New member Username: Dandy_don Post Number: 44 Registered: 2-2002 |
I installed a Fiat radiator cap purchased for $4-5 from a local parts place- O'Reillys I believe and it fit. Best news is that I have no more blowoff or pressure release. Problem solved. Don | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3872 Registered: 2-2001 |
You are right there Peter, I was only thinking of street version. | ||
| '75 308 GT4 (Peter)
Intermediate Member Username: Peter Post Number: 2283 Registered: 12-2000 |
Unless of course it is a requirement where ever that person may be using that car during track-days. Most organisations are sticklers for catch-tanks, both oil and coolant. | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3861 Registered: 2-2001 |
There really isn't any need for it. Just something else to clutter the engine bay. If the system is set up correctly with out air in the system and other things such as engine thermostat, water pump,fans, electric fans thermostat,radiator free flowing, etc. are functioning properly there should be no need for a second tank. | ||
| V.Z. (Ama328)
New member Username: Ama328 Post Number: 45 Registered: 11-2002 |
I once saw a pic in a 308/328 book(don't remember which) of a 308QV(i think) that had an additional overflow tank installed, seems it was attached to the bracing rod that connects the back of the engine to the 'wall' on the front side of the trunk. Caught my eye 'cause i'd never seen one of these before. Anybody experimented with adding an additional tank? Seems like a good idea to me... | ||
| Matt Lemus (Mlemus)
Member Username: Mlemus Post Number: 876 Registered: 8-2002 |
Magoo, You are very right. Most of the threads posted can be found in the OM. Unusual for Ferrari. I guess when it comes to Ferrari, do the opposite. | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3713 Registered: 2-2001 |
Hey Matt, We all should probably read the manual more. | ||
| Matt Lemus (Mlemus)
Member Username: Mlemus Post Number: 840 Registered: 8-2002 |
Magoo, Yes it did. The tank was overfilled. It is half way now. It also says the same thing in the OM. Helps if I read it from time to time..  overfilled for Ferrari but normal for most cars. | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3697 Registered: 2-2001 |
So, That did correct your coolant overflow problem Matt? | ||
| Matt Lemus (Mlemus)
Member Username: Mlemus Post Number: 836 Registered: 8-2002 |
Mine was filled to the top and would spit coolant until the tank reached 1/2 way. bleeding from the front and engine helped. I still have the same cap | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3688 Registered: 2-2001 |
JVR, That was my next comment. The same things that are used on boats to protect the outdrives and prop. from electrolysis corrosion. Don, remove it and make sure the coolant level is 1/2 the tank from the top at normal operating tempature. | ||
| Don McCormick (Dandy_don)
New member Username: Dandy_don Post Number: 43 Registered: 2-2002 |
Just took it out for a run and it did not blow off. Has the new exp tank cap installed but I left the thing a ma jig in. Next I will try it without it and see if there is any difference. Obviously from the blank stares (figuratively) that I am getting about this thing it is not a stock piece as I had originally thought. I will let you know how it goes. Don | ||
| Ron R (Ronr)
New member Username: Ronr Post Number: 35 Registered: 10-2002 |
Maybe the rubber thingie was put in there in case they weren't running antifreeze and had the tank full. The rubber should crush in a freeze, possible enough to protect the tank from bursting? | ||
| JRV (Jrvall)
Member Username: Jrvall Post Number: 314 Registered: 11-2002 |
The thing sounds like the remnants of a sacrificial annode that many place in the cooling system to elctrylosis of the aluminum. | ||
| Bruno (Originalsinner)
Member Username: Originalsinner Post Number: 778 Registered: 5-2002 |
my 80 did it.Tried cap,bleedeing etc. Cracked head.Car ran great just blew off. | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3685 Registered: 2-2001 |
That could be the problem. Whatever that thing is I would take it out and leave it out. The brass ring and the seat on the filler neck probably are not meshing. | ||
| Don McCormick (Dandy_don)
New member Username: Dandy_don Post Number: 40 Registered: 2-2002 |
Magoo, no hole in the rim of the expansion tank, the brass washer I did not do such a good job describing is what supports the rubber shape suspended on the SS cable. The brass washer fits between the rim and the rubber gasket on the bottom of the filler cap. I will try it without the thing and see if it still blows off. Don | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3682 Registered: 2-2001 |
First of all how is that thing suspended on the chain? They didn't punch a hole in the rim of the filler neck did they? Yes I would remove it. | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3681 Registered: 2-2001 |
First of all how is that hing suspended on the chain? They didn't punch a hole in the rim of the filler neck did they? Yes I would remove it. | ||
| Don McCormick (Dandy_don)
New member Username: Dandy_don Post Number: 37 Registered: 2-2002 |
I will buy a new cap and try it. Magoo, good suggestion on cleaning the rim of the tank. Also, I have something that I have never seen before in an expansion tank. It is a rubber shape suspended from the expansion tank filler rim by a stainless steel wire. The wire is attached to a brass washer the inside diameter of which is the size of the filler opening (did not explain this well but...) Anyway what is this? Also I don't think I have a leaky head gasket as the car runs perfectly normally with no overheating. If it does not overheat then it is very unlikely that a head gasket has blown even partially. Anyway I will try a new cap. Should I remove this strange rubber thing in the expansion tank? Don | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3676 Registered: 2-2001 |
Also Don, Another problem is overfilling the system. The level when at normal operating temps should be halfway down into the tank. Sorry I missed that in my last post. | ||
| Mark Eberhardt (Me_k)
Junior Member Username: Me_k Post Number: 199 Registered: 5-2002 |
My car did the same thing. It was a bad cap. | ||
| JRV (Jrvall)
Member Username: Jrvall Post Number: 298 Registered: 11-2002 |
If you continually get air into the cooling system they will blow out the pressure thru the cap, generally after shutdown, but not always. Most common cause of this is a leaking head gaskit allowing combustion pressure (150+psi) to leak into the cooling system (9-14psi). However, before getting excited, make sure you start the bleeding process with mildly warm engine and radiator cap off, heater on. Then with idle only start bleeding the radiator and slowly topping up. This can easily take 20 minutes or more after a water pump replacement, because it's possible to trap an air pocket. If you have a Thermostat Housing with a bleed plug make sure you untrap any air. Before it gets hot, insure the thermostat is underwater, otherwise it won't open properly. You'll end up letting the air out of the radiator numerous times but eventually the air pocket (if any) will be expelled. Idle only and occasionaly up to 1500-1800 rpm's for 5-10 seconds. Constanly rechecking temp gauge and fans while this is all going on. Sometimes removing all the air can be a real pain, just take your time and work thru the steps. | ||
| magoo (Magoo)
Advanced Member Username: Magoo Post Number: 3670 Registered: 2-2001 |
Don replace your cap and make sure there is no corrosion around the seat of the filler neck where the rubber seal of the cap fits. | ||
| Don McCormick (Dandy_don)
New member Username: Dandy_don Post Number: 32 Registered: 2-2002 |
I keep having a problem with the expansion tank blowing off coolant after I have shut the car down. The car runs fine and never even gets close to overheating. With the cold weather I barely can get the coolant temp to 180 degrees. All summer I ran the car with no antifreeze and just distilled water in some pretty intense heat (95-103 degees) with no problems. I just put on one of Nick's ported water pumps on the car so the water pump is definitely not a problem. In preparation for cold weather I put in antifreeze and my problem started. I spent a great deal of time bleeding the system and think I have the air out of it. No oil in the coolant or anything like that. It would seem that one of the following is causing the problem. 1)Still has air in the system (somewhere?) 2)Too much coolant in the system (but should this not be self correcting after it has blown off several times?) 3)Bad expansion tank cap-replaced with one bought from a parts store (Fiat) but still leaks. The old cap can be heard to leak air after the coolant blows off. Maybe it is just a bad cap? Your thoughts please. Don |