How To - Tips > Heating and Cooling

Diablo roadster cooling system

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tonypaul:
sorry if this is a double post, having trouble making post-

What engine do you have? On my LS4 I have the water lines ran in a series- coming out of the outlet on the water pump to the top side of the passenger side radiator. Comming out of the bottom passenger side radiator cross's over in the rear trunk area to the top of the drivers side radiator, out the bottom of the drivers side back across the trunk area and back to the inlet side of the motor. Had it this way on my sbc also, worked real good this way until I put a bigger turbo on it and in the heat of the texas summers it would start going upwards of 200ish. I like to run my temps in the 175-180 area so I added a 3rd radiator under the car between the rear fire wall and the motor. It runs off the in/out ports for the heater core. With a small electric fan it will cool really well.

If your running 2 rear radiators or even one in the front (fiero) and its over heating you gotta make sure you burp the system real good. I have little bleeder ports at the top of each of my rear radiators to bleed mine. If you dont have any bleeder ports just remove the upper hoses and fill with coolant untill it starts comming out.

76mx:

--- Quote from: mhotmarkx1 on June 12, 2016, 11:52:14 AM ---Not exactly what i wanted to hear. How can i check this. pull the plugs and do a compression test?

--- End quote ---
No, a compression test is effected by the condition of the rings and valves. I think you meant a leak down test anyway, but still the condition of the rings and valves will make it an ineffective diagnosis. Warm the engine then do a leak down check on the radiator. Be careful, if it is severe, too much fluid will be leaked into the cylinder and the rod will bend like a twig when it hits the fluid and hydro locks. The overall layout of the cooling system is important but not for this problem. It can go to China and back and you never said anything about overheating or cooling problems. Your problem is too much pressure coming into a supposedly sealed system from an outside source. But how can it be building enough pressure to blow a hose off before it blows the cap pressure or burst a hose?   

mhotmarkx1:
Will scan my sketch tomorrow and upload.

01Lambiero:
I think that you left out the meat and potatoes on this one.  Where is the sketch of YOUR system including the engine?  What are the temps that you are running?  Are you building up pressure during warm up?  We can only guess as to what your needs are. Pictures are a big help also.  An excellent tool to purchase is a laser temp gun. 

01

mhotmarkx1:
Not exactly what i wanted to hear. How can i check this. pull the plugs and do a compression test?

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