V8 conversion running to hot! - Page 2 - JeepForum.com

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post #16 of 21 Old 04-07-2010, 11:11 AM
5.7YJ
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Is this engine equiped with a reverse rotation(serpentine belt) or standard rotation(v-belt) water pump? If the PO put the wrong pulley system on, your WP would be running backwards. I think it would be running hotter than it is if that was the case bit it's something to look at. 210 degrees isn't that hot but with a 160 thermostat in and good coolant and air flow, it should be able to run around 170 to 180 with no problem.

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post #17 of 21 Old 04-07-2010, 11:43 AM Thread Starter
owens261
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The 350 is carbarated, I did not build the motor, they are aluminum heads on a cast iron block, not sure what cc chamber heads they are but they are flat top pistons. I run 93 octane and the electric fan is 2500 cfm.
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post #18 of 21 Old 04-07-2010, 11:45 AM Thread Starter
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That's just it that thermostat is a 160 the fan comes on at 180 and I can never get it back down cool enough to stop the fan.
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post #19 of 21 Old 04-07-2010, 09:13 PM
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Check your timing 7 to 10 degrees before top dead center ( if I remember correct). Then if it is close to octane knock that can cause you to run hotter then need be. It will start good and run like a raped ape.

2 or 4 barrel carb ,too big or too small can cause what you describe. You might be running to lean. This easy to see look at your exhaust pipes black is normal but not with a build up( smooth looking) tanish to white would be too lean (this is great for fuel mileage) but not for keeping the engine in normal heat range.

if all the above is good then you might want to add an engine oil cooler to your jeep. They are good for a 10-20* lower temps.

A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
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im just cheap, and cheap makes you creative.
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post #20 of 21 Old 04-08-2010, 03:57 PM Thread Starter
owens261
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Is it sufficient to run with a large 2 coil radiator about 3 inches wide??????????????????????????????????
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post #21 of 21 Old 04-08-2010, 08:52 PM
dodger889
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Quote:
Originally Posted by owens261 View Post
Is it sufficient to run with a large 2 coil radiator about 3 inches wide??????????????????????????????????
Huh???? what are you talking about???? An oil cooler? radiator? If the coolant running through a radiator to fast then you will over heat. Too many rows can be as bad as not enough.

A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
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Originally Posted by bigsquat View Post
im just cheap, and cheap makes you creative.
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