Projected horsepower
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From: Louisiana
[QUOTE=ddnspider;20527984]You're saying you've driven the truck since the gasket change with no overheating and haven't been WOT with the turbo setup? If so that would be a good sign.[/QUOTE
yes that is correct
yes that is correct
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From: Louisiana
I'm not sure on the fans, it seems around 200 they come on , but I'm not sure on the exact number. I tried a 185 & 165 to see if I noticed any difference. I tested them in boiling water and they both came open like they should. I did notice if I drive the truck the temperature seems to go down, it's when I slow down or idle the truck it starts to go up and when I kill it I can hear it boiling and when I pop the hood the coolants it's overflowing from reservoir. Almost like it just boils it all out. Definitely pressure on the cap when I ease it open. I flushed the radiator yesterday and the water Is immediately dirty as hell, not like a oil color or anything like that, more like rust
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From: Louisiana
Last edited by Tommy42088; Nov 6, 2023 at 10:00 AM.
no, I have it converted to dual fans on a Nelson harness. I'll definitely put another radiator cap on it just to give it a try. The only problem I have with that is when I crank the truck with no cap on it and the upside down bottle on it then why is it steaming like that. The cap hasn't even been used at the point. When I bled my wife's car I could let it run without the cap and nothing overflowed and there wasn't pressure. This truck you gotta stay back a few feet or it will spray you with hot water. I was hoping thermostat but I put it in boiling water and it opened
In my distant past when I had a bad head gasket, I could smell the coolant in the tail pipes.
At this point I'd source another cap, I run a Moroso 19-21 but maybe some of the guys on here have stronger opinion on your options... Stant for example.
I'd also make sure both fans are coming on. If you are Holley Terminator it would read off the coolant temp sensor on the driver's side front cylinder head. I'd have both fans come on. I'd make sure they are also pulling.
If you are Holley and want to partner up with a tuner who is great at trouble shooting, I'd suggest Andrew who has the '67 Cougar build on here. He just figured out why a local buddy's swap was running poorly.
At this point I'd source another cap, I run a Moroso 19-21 but maybe some of the guys on here have stronger opinion on your options... Stant for example.
I'd also make sure both fans are coming on. If you are Holley Terminator it would read off the coolant temp sensor on the driver's side front cylinder head. I'd have both fans come on. I'd make sure they are also pulling.
If you are Holley and want to partner up with a tuner who is great at trouble shooting, I'd suggest Andrew who has the '67 Cougar build on here. He just figured out why a local buddy's swap was running poorly.
Thread Starter
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Joined: Oct 2022
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From: Louisiana
In my distant past when I had a bad head gasket, I could smell the coolant in the tail pipes.
At this point I'd source another cap, I run a Moroso 19-21 but maybe some of the guys on here have stronger opinion on your options... Stant for example.
I'd also make sure both fans are coming on. If you are Holley Terminator it would read off the coolant temp sensor on the driver's side front cylinder head. I'd have both fans come on. I'd make sure they are also pulling.
If you are Holley and want to partner up with a tuner who is great at trouble shooting, I'd suggest Andrew who has the '67 Cougar build on here. He just figured out why a local buddy's swap was running poorly.
At this point I'd source another cap, I run a Moroso 19-21 but maybe some of the guys on here have stronger opinion on your options... Stant for example.
I'd also make sure both fans are coming on. If you are Holley Terminator it would read off the coolant temp sensor on the driver's side front cylinder head. I'd have both fans come on. I'd make sure they are also pulling.
If you are Holley and want to partner up with a tuner who is great at trouble shooting, I'd suggest Andrew who has the '67 Cougar build on here. He just figured out why a local buddy's swap was running poorly.
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From: Louisiana
I've changed the waterpump twice I'd say within the last 2 years, the last time I did just whenever got the heads port n polished and i noiticed rust so i changed it again. It was under warranty. So honestly its been rusty, just hasn't caused this problem. I literally flushed the radiator yesterday and then in about 5 minutes with fresh coolant it was back rusty again that quick
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he wasn't able to make any WOT pulls, it was burning spark plug wires at the time so we couldnt get a full rev out of it, and i called him yesterday and asked him about it and he said it didn't over heat any on him. Forgranted it was a little colder at the tike and the dyno fans were also on it
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From: Louisiana
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As you said testing a 160 stat in boiling water is not exactly accurate but does prove it isn't siezed shut. Hole drilled in Stat body is definitely a good idea - always do that. Your problem certainly seems like a flow issue , yrs ago I saw a gm pump where the plastic impeller was cracked and pretty much free wheeling on the shaft , was a bit of head scratching on that one . Not sure what an ls truck pump loo,s like inside but thought I would mention it . Can you disconnect the steam line at the rad or reservoir while running? That would establish that coolant is flowing at least. Top hose / hot side tank getting hot? Could have the coolant tested for combustion products . Do you have a rad pressure tester ? Can hook that up while running and if there's a quick rise in pressure then you have head gasket issues or a crack.
Thread Starter
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Joined: Oct 2022
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From: Louisiana
As you said testing a 160 stat in boiling water is not exactly accurate but does prove it isn't siezed shut. Hole drilled in Stat body is definitely a good idea - always do that. Your problem certainly seems like a flow issue , yrs ago I saw a gm pump where the plastic impeller was cracked and pretty much free wheeling on the shaft , was a bit of head scratching on that one . Not sure what an ls truck pump loo,s like inside but thought I would mention it . Can you disconnect the steam line at the rad or reservoir while running? That would establish that coolant is flowing at least. Top hose / hot side tank getting hot? Could have the coolant tested for combustion products . Do you have a rad pressure tester ? Can hook that up while running and if there's a quick rise in pressure then you have head gasket issues or a crack.