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First, the belt came off and damaged a vacuum valve inline on the heater core hose. Valve broke and was replaced with straight half-inch pipe temp. But I still don't have heat.

Then the upper radiator hose split near the thermostat and sprayed water/antifreeze into the air intake adapter at end of the air filter housing with a lot getting inside. I replaced the hose.

Now the motor runs very rough with no power. It wants to die in gear (better in neutral), the brakes seem mushy and don't hold.

Could fuel injectors be fouled from antifreeze? At start up I see excess water from the tailpipe, sprayed out 10-14"!

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A vacuum valve broke and you replaced it with a straight pipe? You likely have a large vacuum leak (or imbalance), especially since your brakes are "mushy." Vacuum lines that are hooked up incorrectly can definitely cause a loss of power, stalling, "Check Engine" light and other problems. Replace the vacuum valve properly before troubleshooting any further.

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  • i forget about this part definitely 😂
    – Cubic273.15
    Commented Jan 3, 2021 at 6:48
  • Use carb cleaner or starter fluid on cold engine , spray around vacuum hoses to find air leak , if the engine changes rpm then you have a problem with the seal at that joint , keep it away from the exhaust. Mind your fingers/limbs on moving parts!
    – binaryOps20
    Commented Jan 3, 2021 at 13:23
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The fuel injector couldn't get water inside since the fuel line system is using a different line system.

Like binaryOps20 said you could possibly damage the head gasket because there is excess water shoot out from your tailpipe.

How to check blown head gasket:

  • Use the blown head gasket test kit -Like this one-
  • Check with your radiator.

Another to check from the radiator:

  • When the engine is cold (cool not freeze)
  • open the radiator cap
  • fill in the water/coolant until full.
  • Preferably 2 persons doing it, one to look at the radiator and the other cranking the engine.

If the radiator shoots the water out when cranking it, your compression is leaking out to the water inlet/hole that's why the water shoots out to your exhaust.

Another one is to check when it is running if there is any leaking water from between your cylinder head and engine block (see the head gasket line). If there is leaking water or like a bubble coming out from the head gasket line your head gasket is blown up or worse your cylinder head is wrapped.

If the cylinder head is wrapped you don't need to buy the new head, you just need to resurface it (resurfacing), just go service shop that have a resurface machine. Or you can go try to resurface yourself, which using sandpaper, there is plenty of youtube video how to resurface it, I have done it myself, but better use the machine because it makes me exhausted resurfacing the iron cast head :)

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  • Most of the time a blown head gasket allows water into the oil, so if you pull the oil dipstick out and it looks like it's been dipped into a chocolate milkshake it's probably a blown head gasket.
    – Arthur Kalliokoski
    Commented Jan 3, 2021 at 21:53
  • @ArthurKalliokoski i have been repairing the cylinder head gasket that blown up but the oil still good, the water didn't get inside to oil hole. and viscosity of water much lower than the oil so the leaking water is more common to get out from the head gasket and exhaust rather than in the oil. unless the blown gasket is ignored and making it larger (head wrap) it could get inside the oil system
    – Cubic273.15
    Commented Jan 4, 2021 at 5:25
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Several things

  1. Could be water in the intake resonator from that incident , remove intake resonator(box connected to intake hose) and drain it.Water will mess with air fuel reading and make idle crap.

  2. You could have possibly damaged the head by excessive heat , try to do a head gasket test, (use dye kit or when engine is cold open radiator cap for a short time and watch for bubbles).The head gasket seals the coolant from the block , when you overheat the engine the big metal head warps which breaks the seal on the gasket and lets water in.If this is case , its a new head replacement(buy new car ,expensive work)

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