L92 swap overheats in highways
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Teching In
Joined: Jun 2023
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L92 swap overheats in highways Hi guys,
I have swapped a range rover classic, having now l92 with ls3 intake manifold, 6l80e, running great, still not tuned yet ( only initial tune to make it run )
I had some problems with overheating, i have removed the thermostat and bled the system two days ago, and since then, car is running on good temps ( goes up to 203 and down to 192 - that's where the fans shut off ).
So far so good, but taking it for a spin on highways can raise the temp, around to 215/217, then if I go in a slower speed or even park it, it decreases to 192 again.
Radiator is new, 2 mishimoto race line fans, new water pump ( acdelco ), fans pull great when standing they are very powerful and can reduce temps and shut off in about a minute, antifreeze only.
What can that be? a bad tune ? ( I see A/F Ratio around 15.0 on highways - on the dummy obd reader )
I can run it for hours in town and everything can be perfect, even with A/C on.
Any ideas ?
Thank you!
I have swapped a range rover classic, having now l92 with ls3 intake manifold, 6l80e, running great, still not tuned yet ( only initial tune to make it run )
I had some problems with overheating, i have removed the thermostat and bled the system two days ago, and since then, car is running on good temps ( goes up to 203 and down to 192 - that's where the fans shut off ).
So far so good, but taking it for a spin on highways can raise the temp, around to 215/217, then if I go in a slower speed or even park it, it decreases to 192 again.
Radiator is new, 2 mishimoto race line fans, new water pump ( acdelco ), fans pull great when standing they are very powerful and can reduce temps and shut off in about a minute, antifreeze only.
What can that be? a bad tune ? ( I see A/F Ratio around 15.0 on highways - on the dummy obd reader )
I can run it for hours in town and everything can be perfect, even with A/C on.
Any ideas ?
Thank you!
Thread Starter
Teching In
Joined: Jun 2023
Posts: 3
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i can cool it if i run the fans manually, but that is super weird because the air flow of a moving car is way higher than two fans, thats why im starting to think im running lean
What do the spark plugs look like? Pull a few and have a looksey. Plugs don’t lie, but 15.0 on the interstate is lean, if it’s right. Trust your spark plugs.
Thread Starter
Teching In
Joined: Jun 2023
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I will take a few spark plugs later today.
I tried blowing air with air blower from the grill and feel the air moving in the back of the radiator, no luck, looks like something is blocked there, I just sorted my AC, looks like i'm going to remove it again.
I tried blowing air with air blower from the grill and feel the air moving in the back of the radiator, no luck, looks like something is blocked there, I just sorted my AC, looks like i'm going to remove it again.
