How do I flush renix engine?
#17
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
In, right there, (photo) with the lower radiator hose off. Never put cold water in a hot engine. Let it cool after whatever "product" has had its "specified" time to work, then only there (in photo) so you are not pushing back into the hearer core.
Those clamps on the heater hose you see in the photo are where the Prestone flush deal (the PO used), failed and made it puke it's coolant and overheat.
Those clamps on the heater hose you see in the photo are where the Prestone flush deal (the PO used), failed and made it puke it's coolant and overheat.
Last edited by DFlintstone; 03-15-2014 at 11:50 PM.
#18
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In, right there, (photo) with the lower radiator hose off. Never put cold water in a hot engine. Let it cool after whatever "product" has had its "specified" time to work, then only there (in photo) so you are not pushing back into the hearer core. Those clamps on the heater hose you see in the photo are where the Prestone flush deal (the PO used), failed and made it puke it's coolant and overheat.
#20
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Buddy of mine is saying to take out the tstat and put the housing back on then flush it all through the upper rad hose with the heater full and engine on. But I'll have to get a new tstat and gasket?
#21
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Prestones kit is "almost" useless on a closed system, the only thing I believe you could use is the water hose adapter and even that is not necessary having both heater "hoses" unhooked. Now if you are talking about the radiator flush stuff it's okay... just bypass the heater core and flush that with fresh water "both" directions till clean.
Yes you can pull your T-stat, but don't have to.If your T-stat was fine then run it if you trust it, you don't always have to get a new one. The new gasket if you pull the T-stat I would get some gasket shelac, this stuff when applied right will allow you gasket to be re-used within reason.
If your engine is full of crud the upper hose flush may not be sufficient.
Yes you can pull your T-stat, but don't have to.If your T-stat was fine then run it if you trust it, you don't always have to get a new one. The new gasket if you pull the T-stat I would get some gasket shelac, this stuff when applied right will allow you gasket to be re-used within reason.
If your engine is full of crud the upper hose flush may not be sufficient.
#22
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Prestones kit is "almost" useless on a closed system, the only thing I believe you could use is the water hose adapter and even that is not necessary having both heater "hoses" unhooked. Now if you are talking about the radiator flush stuff it's okay... just bypass the heater core and flush that with fresh water "both" directions till clean. Yes you can pull your T-stat, but don't have to.If your T-stat was fine then run it if you trust it, you don't always have to get a new one. The new gasket if you pull the T-stat I would get some gasket shelac, this stuff when applied right will allow you gasket to be re-used within reason. If your engine is full of crud the upper hose flush may not be sufficient.
#23
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Year: 2000
Model: Cherokee
Engine: 4.0 I6
X-2 on rad drain. Had problem with it on ex's Grand. On hers and son's XJ I just pulled lower hose from engine to drain.
As to flushing, I used a 3/4" double barb nipple and 12" of 3/4 hose to attach smaller (5/8, lower? on water pump) hose to thermostat hosing, and hose from hosing is long enough to go to water pump tube. This allows reverse feed to heater core.
There are cooling system flushes available, some one part, some two. I have used two part in past with satisfaction, which are some kind of acid and neutralizer. I actually used about a cup of muratic acid, clear water flush, then baking soda in flush, then more clear water flush.
BLA, bla time consuming. Got the job done
As to flushing, I used a 3/4" double barb nipple and 12" of 3/4 hose to attach smaller (5/8, lower? on water pump) hose to thermostat hosing, and hose from hosing is long enough to go to water pump tube. This allows reverse feed to heater core.
There are cooling system flushes available, some one part, some two. I have used two part in past with satisfaction, which are some kind of acid and neutralizer. I actually used about a cup of muratic acid, clear water flush, then baking soda in flush, then more clear water flush.
BLA, bla time consuming. Got the job done
#24
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
use the heater hose(s) for the flush, both disconnected so water will flow out for flush. Do the heater core by itself, this seems to garner better results.
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