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Old 11-30-2011, 06:00 PM   #1
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question to the wise

Hey forum, i just did an engine swap on my 97 Tj, no upgrade, just went from a 2.5 to another 2.5. The engine started on the first attempt, but it died during the first test run. We had some white smoke coming from the muffler & there was some over heating. We figured the overheating was from not having enough coolant, i just would like to know if there is anything else that could have caused the white smoke & the engine to cut off

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Old 11-30-2011, 06:06 PM   #2
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White smoke is related to coolant burned in the engines combustion chamber. Where did you get the engine from? It could possibly have a bad head gasket or cracked head. If it's a new engine I would contact the manufacturer you got it from ASAP. If you had burped the cooling system and made sure it was full before the test ride, this would explain why it was low on coolant and overheating.

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Old 11-30-2011, 06:33 PM   #3
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Yeah, that was the 1st issue we realizes, we were low on coolant & hadnt burped the system.
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Old 11-30-2011, 06:49 PM   #4
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You could have a bad head gasket. Or maybe even a bad PCV (but less likely)

WHY, why did you replace the first engine?
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Old 11-30-2011, 06:55 PM   #5
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The first engine needed more repairs than i could handle, shot lifters, bad cam shaft, blown head gasket, i got the new engine from a fellow jeeper who was steppin up to a V8, no problems prior to pulling the engine
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Old 11-30-2011, 07:16 PM   #6
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You wouldn't be the first guy who bought a bad motor. And the seller wouldn't be the last guy who failed to disclose that the reason he was stepping up to a V8 was because his current engine was shot.

Just sayin'.

But here's what I'd do if I was you. Start with a compression test and a leakdown test on the cylinders, then a pressure test on the cooling system.

Also, when you look into the radiator, do you see milky water, like cottage cheese?
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Old 11-30-2011, 07:35 PM   #7
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Yeah, we r doing a compression test tomorrow, but so far, no milky residue n the radiator or under the valve cover
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Old 12-03-2011, 02:24 AM   #8
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Thanks for the help, all turned out well, just needed to burp the system & add coolant. Back in business

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