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Strange over heating
Okay so I've been dealing with a over heating problem and it doesn't matter if it's 30 or 90 outside. I drive 15miles to work one way half on side streets and the rest on the fwy. And it will try to over heat on both.
What it does is after driving for prob 20 min and it's all heated up if the rpm don't stay high it will start to overheat. So say I'm at a light and I see the temp climbing I have to rev the engine above 3500 then the temp will come down. Same thing happens right when I get off the fwy :/ I have noticed that if I start slowing down before my exit and downshift early it does seem to help it not overheat as fast.
I changed the thermostat didn't change a thing. Changed the water pump last week didn't change a thing. Tried flushing the system didn't help. Tested the fluid for a headgasket leak a few times all came back negitive. I did blow the cooling hose under the manifold last week.
So wondering if there is a build up of pressure? Maybe a plugged radiator? It looks clean tho.
Any ideas? Thx guys
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#1 1994 Ls ebony parts car-rip
#2 1994 L laguna blue - sold
#3 1992 Lsi pearl white - sold
#4 1992 Lsi pearl white -Ate two engines - Rip
#5 1994 L Laguna Blue fwd - Now Awd and manual - 03 wrx 5mt - 18's stern warp st4s - totaled hit a tree 
#6 1992 Lsi custom orange parts car
#7 1992 Lsi green 4.44 swap. Currently for sale
#8 1992 Lsi custom pearl white. Project car... sold
#9 1992 Teal 4.44 swapped... sold
#10 1995 Laguna Blue. Sti 19 wheels,
#11 1994 Laguna Blue. Came with #10 engine and trans are out but plan to put it back on the road. Willing to sell it at any time! 😂
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