12-06-2017, 12:04 AM | #26 | |
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Re: truck wont warm up
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12-06-2017, 01:03 AM | #27 |
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Re: truck wont warm up
I still don't understand the hose coming off the radiator that is cut and plugged? Doesn't it go to the heater core? That cut / plug isn't factory. The plumbing is suspect to me.
I took the dying 350 out of my 94 GMC Sierra 1/2 ton and dropped in a 454. I initially bypassed the heater core due to not having hose on hand during the swap. I just hooked it up a few weeks ago and used that port you have cut and plugged to go to the heater core. I have hot heat and my aftermarket temp guage shows I get up to temp. Different engine, but I still think that hose needs hooked up Last edited by Sixball; 12-06-2017 at 01:11 AM. |
12-06-2017, 02:44 AM | #28 | |
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Re: truck wont warm up
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12-06-2017, 11:11 AM | #29 |
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Re: truck wont warm up
Whether the hose goes to the water pump or to the rad, it's still just the return line. The pressure line to the core is the one from the intake.
So one more question. When you pop the rad cap off when the motor is cold, where is the coolant level? |
12-06-2017, 11:29 AM | #30 |
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Re: truck wont warm up
right at the bottom of the neck.
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12-06-2017, 12:15 PM | #31 |
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Re: truck wont warm up
Level should be right at where the rad cap seal is.
Is your recovery tank working like normal? |
12-06-2017, 01:29 PM | #32 |
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Re: truck wont warm up
now that i don't know
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12-06-2017, 01:39 PM | #33 |
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Re: truck wont warm up
The recovery tank should have a cold setting mark on it for the level. The hose off the rad should always be submerged in that coolant level. You don't want the hose to ever draw air back into the rad.
THere will also be a high level mark on the tank. That's where the coolant should be when the motor is hot. If you're pulling in air all the time you'll get air pockets in the system. You won't get heat from the air pockets. |
12-06-2017, 01:41 PM | #34 |
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Re: truck wont warm up
roger that. will double check before and after i flush the system. thanks
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12-06-2017, 05:14 PM | #35 |
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Re: truck wont warm up
ok so i back flushed the heater core and it was really clean. I didn't mess with flushing the rest of the system. no sign of stop leak or bad corrosion. the recovery tank seems to be working fine. I am going to NAPA to get a T-stat. the one from advance auto may just be a pile of crap. will update tomorrow on how it goes.
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12-07-2017, 07:58 AM | #36 |
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Re: truck wont warm up
Once running for awhile, you say the top hose is warm, but what about the engine? If that is hot, I’d say t-stat, also if same temp as hose. POS t-stat lol.
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12-08-2017, 04:21 PM | #37 |
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Re: truck wont warm up
i have been on this pos all friggin day. put the best t-stat that napa had in. 195*. top radiator hos is the only hose that will get hot. neither heater hose or bottom radiator hos will get hot. just BARELY warm. According to temp gauge it is only reaching roughly 120*. heat is just barely warm. another thing i noticed is the right side of the radiator get as hot as the top hose (same side as top hose). left side is just warm.
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12-08-2017, 07:08 PM | #38 |
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Re: truck wont warm up
drained the whole system and filled it with white distilled vinegar. run it for 15 minutes. letting it sit now and will drain and refill with coolant in about 3 hours. i hope it works. lol
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12-08-2017, 07:30 PM | #39 |
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Re: truck wont warm up
What kind of fan you got?
Is your a/c compressor wiring correct? |
12-08-2017, 07:32 PM | #40 |
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Re: truck wont warm up
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12-08-2017, 07:41 PM | #41 |
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Re: truck wont warm up
The a/c not working might be the problem. With it not working maybe there's a door(flap) open that shouldn't be. Letting in cold air to the fan.
Reason I say that is if I unplug my compressor I don't get much heat from my heater either. |
12-08-2017, 08:00 PM | #42 |
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Re: truck wont warm up
the problem isn't the heat. the problem is the engine will not warm up. the temp coming from the heater is consistent with the temp of the engine. I have even blocked off part of the radiator and the temp only increased by about 10 degrees.
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12-08-2017, 09:32 PM | #43 |
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Re: truck wont warm up
Block off the whole rad except for a 6 inch hole in the center.
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12-10-2017, 06:39 PM | #44 |
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Re: truck wont warm up
Update. Git it fixed. There was an air pocket that was tough to get out. finally got it out by letting it idle for about 2 hours blipping the throttle occasionally and pumping the top rad hose. temp is normal now. still had no heat and found the intake line to the heater core was almost completely plugged. all cleaned out and good heat now. thanks for all the help.
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12-12-2017, 09:31 AM | #45 | |
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Re: truck wont warm up
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