LS vtec newbie here, got a overheating problem.
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Honda-Tech Member
Joined: Aug 2006
Posts: 106
Likes: 0
From: Battle Ground, Wa, USA
LS vtec newbie here, got a overheating problem.
Ok so I just recently picked up a 92 Eg Si w/ a LS Vtec plant. B18a1 block, b16 head.
Here are my symptoms.......
Expansion tank will be completely full after 25 minutes of driving, as if the cooling system is being pressurized internally.
Car will over heat after 25 minutes
No white smoke
No coolant leaks
Fan works
Heater works normally
What I have done to try to fix this stupid problem........
Replaced t-stat
Replaced Radiator
Have tried to bleed the cooling system, several times
Pressure tested cooling system, both cold and hot.
Cold - held pressure, no drop, no leaks
Hot - pressure drop of was only 3 psi or so after about 5 minutes, no leaks
Performed leak down test
All cylinders were low leakage, 20%, 18%, 17%, 15%
No bubbles in the coolant during leakdown test.
No rainbows or oil mixture in the coolant
No milkshake oil from what I can tell
Have had a lot going on lately but i'm going to put a water pump in it this weekend and go from there. I'm suspecting that this isn't the end of this issue but i'm trying to get away with fixing this for as cheap as possible. Deep down i'm suspecting that I warped the head which is causing the overheating problem. I need another point of view on this problem, so I turn to you HT. Any input is appreciated.
Here are my symptoms.......
Expansion tank will be completely full after 25 minutes of driving, as if the cooling system is being pressurized internally.
Car will over heat after 25 minutes
No white smoke
No coolant leaks
Fan works
Heater works normally
What I have done to try to fix this stupid problem........
Replaced t-stat
Replaced Radiator
Have tried to bleed the cooling system, several times
Pressure tested cooling system, both cold and hot.
Cold - held pressure, no drop, no leaks
Hot - pressure drop of was only 3 psi or so after about 5 minutes, no leaks
Performed leak down test
All cylinders were low leakage, 20%, 18%, 17%, 15%
No bubbles in the coolant during leakdown test.
No rainbows or oil mixture in the coolant
No milkshake oil from what I can tell
Have had a lot going on lately but i'm going to put a water pump in it this weekend and go from there. I'm suspecting that this isn't the end of this issue but i'm trying to get away with fixing this for as cheap as possible. Deep down i'm suspecting that I warped the head which is causing the overheating problem. I need another point of view on this problem, so I turn to you HT. Any input is appreciated.
Honda-Tech Member
Joined: May 2009
Posts: 1,722
Likes: 1
From: So-Cal
Re: LS vtec newbie here, got a overheating problem.
Sounds like the Water pump. My old GSR did all that. I never had a thermostat and I found out it was the water pump cuz I could not feel the water surging through the RAd hoses. Normally the weep hole leaks on a Water pump issue. Mine did not.
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