Coolant lines mpi
Posted 16 January 2018 - 06:53 AM
Posted 16 January 2018 - 09:07 AM
Page 3 actually has some pictures, I did mine slightly differently but its the same, you need to allow the coolant to constantly flow from the underside of the stat around to the steel tube and it needs to be somewhat restricted. The heater connections are the same as TBI.
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Posted 16 January 2018 - 11:54 AM
Although the stock system does have a path for water to flow like this through the stock manifold, what can't be seen is that the path is greatly restricted internally, there is a flow restrictor in the TBI manifold casting. Not much gets through it. If you hook up a 5/8" bypass in the front of the motor, not much will flow to the back port.
On the stock steel bypass pipe you want to connect one hose to the port between #3 and #4, this ensures coolant flows to the back of the motor at all times via the bypass. You can use "T" fittings to hook up your heater core, or not. Some cap off one of the steel bypass pipe ports. I bypassed my heater core and ran a braided line from the #3/4 port on the manifold directly to the pump where that steel bypass pipe connects. No matter what is going on, the back of the block always has coolant flowing to the back.
Depending on the stat you use, there will be some flow through that stat itself so it can get a trickle of hot water to be able to accurately read coolant temp. Some drill a 1/8" hole in the thermostat itself to ensure there is always something flowing to get fresh hot water to the stat and CTS. This won't flow enough to disrupt the cooling or warm-up process.
Posted 16 January 2018 - 12:21 PM
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Posted 16 January 2018 - 02:04 PM
Posted 16 January 2018 - 04:19 PM
Posted 16 January 2018 - 08:54 PM
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