Edelbrock 2151 Performer Intake Coolant Line
#1
Edelbrock 2151 Performer Intake Coolant Line
Building-up my rebuilt 455 for my 442. Engine came with the EB Performer Intake with a stainless coolant cross-feed line going to the forward to aft LH side coolant passages.
See picture, is this necessary? It had iron heads now aluminum. I may call EB on this but I know there are folks here that are just as knowledgeable.
See picture, is this necessary? It had iron heads now aluminum. I may call EB on this but I know there are folks here that are just as knowledgeable.
#2
Whoever put that bypass on is clueless. For some reason, people think this helps cooling. Unfortunately, these are people who have never actually opened a Chassis Service Manual and looked at the coolant flow diagram. Coolant flows into the water pump, rearward in the block, up into the heads, and forward in the heads before exiting at the T-stat housing. Installing a bypass like this actually REDUCES coolant flow to the heads, which are the hottest part of the engine. Lose it.
#3
Will do, thanks Joe. Car came that way and yeah it has had a lot of clueless done to it.
Based on your explanation the driver side heads would lose some coolant flow- glad I asked.
Based on your explanation the driver side heads would lose some coolant flow- glad I asked.
#5
-Stew
#6
Whoever put that bypass on is clueless. For some reason, people think this helps cooling. Unfortunately, these are people who have never actually opened a Chassis Service Manual and looked at the coolant flow diagram. Coolant flows into the water pump, rearward in the block, up into the heads, and forward in the heads before exiting at the T-stat housing. Installing a bypass like this actually REDUCES coolant flow to the heads, which are the hottest part of the engine. Lose it.
#7
Chevy people push this, and as I noted above, it makes ZERO sense. All you are doing is pulling coolant out of the head before it has a chance to cool the head. How does this help?
#8
A SMALL hose or tube (-4 or 1/4") on the rear of the intake can bleed steam from the engine part of the cooling system.
BIG hose or tube on the rear was all the rage...but I never understood it.
BIG hose or tube on the rear was all the rage...but I never understood it.
#10
#11
You wouldn't get any coolant flow through that line what so ever being where it is for 1, nor up that high. Once the system pressurises with coolant it would just remain in the line.
Someone thought it may have done some good when they installed it I suppose.
Eric
Someone thought it may have done some good when they installed it I suppose.
Eric
#16
Whoever put that bypass on is clueless. For some reason, people think this helps cooling. Unfortunately, these are people who have never actually opened a Chassis Service Manual and looked at the coolant flow diagram. Coolant flows into the water pump, rearward in the block, up into the heads, and forward in the heads before exiting at the T-stat housing. Installing a bypass like this actually REDUCES coolant flow to the heads, which are the hottest part of the engine. Lose it.
#17
After reading this thread, I checked the original heater hose nipple for my non-A/C 69 442. There is, what looks like, a plastic disk sitting in a grove in the nipple. The inner diameter looks to be about the same size as the hose nipple. IIs this the restrictor or does something sit on top of that? It may be hard to see but I added a photo below.
#18
That's it. Easy to miss. When I transferred the nipple from the stock manifold to my new aluminum manifold. Mine was still sitting in the well in the old intake manifold. I don't remember the exact symptoms (35+ years ago) but the cooling system was not working right without that restrictor disk.
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delta881972
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March 12th, 2010 07:54 PM