New cooling system

[Drew Gregg]

My engine will start to overheat in stop & go traffic with the A/C on. @sfdon put together his cooling system & A/C system that he uses on the cars in his shop. We also found the lower radiator hose that has been on the engine was wrong and was crimped at the T-Stat housing. The engine has never been hot in the 14K miles I have driven, except as mentioned before.
Now the BMW hoses are correct, the radiator, shroud, and fan & clutch are new, the Graf PA380 water pump,t-stat (80C) & cover are also new with BMW coolant/distilled water added as a 50% solution.
The entire A/C system will be installed after the trip to Highlands, NC. Here are pics of Don's Champion radiator and Topran German fan.

 

[Ezz]

Hello Drew,

Would you be able to provide the part number for the correct lower radiator hose?
I ordered this from FCP but doesn't seem to fit properly. It bends near the thermostat housing.
I have the champion radiator as well.

BMW Hose (2500 2800 3.0CS) - Genuine BMW 11531251520

BMW Hose (2500 2800 3.0CS) - Genuine BMW 11531251520

www.fcpeuro.com

Thanks

 

[sfdon]

There are 2 different hoses…

 

[Ezz]

Thanks, Don.
The one I purchased is for the early models (my E3 is 1971), but I have the late thermostat cover on if that makes a difference.
I can take some pictures tomorrow to show the issue

 

[sfdon]

If you have modified your engine to use a distributor cap like a Motronic version or a later thermostat housing cover (post a pic please) you will need the special late “750” hose.
pic ?

 

[Ezz]

Sorry for the delay.
I am using the later thermostat housing, but original distributor setup.

 

[Ohmess]

Ezz - I'm confused on what your issue may be. You asked about the lower radiator hose, and Don gave you the part number. You then indicate you are going to post pictures of the problem. The pictures, however, do not show a hose connected to the lower radiator attachment point on the water pump, and they do not show the attachment point on the bottom of the radiator.

Your pictures appear to highlight the upper radiator hose attachment.

 

[Ezz]

Thanks, Chris.
The way I read Don’s message is to post a pic of the thermostat housing cover. But maybe J am wrong.
So here are few pics of the issue:

 

[Stevehose]

Did you try flipping the ends to see if it fits that way?

 

[Ezz]

Yep, i tried that. Won’t work.

Did you try flipping the ends to see if it fits that way?