Starting a Head gasket replacement tomorrow. - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 21 (permalink) Old 01-02-2018, 08:32 PM Thread Starter
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Starting a Head gasket replacement tomorrow.

I'm going to be tackling a driver side head gasket replacement tomorrow. 2007 Overland the motor is a rebuilt 2008 Hemi with 20k. Is there anything special I should be aware of? I plan to document the process and provide a write up in case anyone else decides to take on the task in the future... any advice or tips.
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post #2 of 21 (permalink) Old 01-02-2018, 09:13 PM
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Have a new set of exhaust manifold bolts and gasket. And don't forget to connect the vacuum hose for the brake system to the back of the intake manifold. Clean the throttle body and intake best you can.

07 XK Overland 5.7L 2" lift with 265-70-17
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post #3 of 21 (permalink) Old 01-02-2018, 10:16 PM
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Quote:
Originally Posted by Sir Pay View Post
I'm going to be tackling a driver side head gasket replacement tomorrow. 2007 Overland the motor is a rebuilt 2008 Hemi with 20k. Is there anything special I should be aware of? I plan to document the process and provide a write up in case anyone else decides to take on the task in the future... any advice or tips.
If you have the time to take some pics and post a break down/step by step of what you do from start to finish - that would make a nice tutorial for other members.....


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post #4 of 21 (permalink) Old 01-03-2018, 03:43 PM
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If it was me, I would ditch the factory hardware and get ARP studs for the heads. If they are out of your budget, get their head bolts. Their products are substantially stronger than the factory bolts and aren't susceptible to stretch and fatigue.

Get high quality aftermarket gaskets. I would do both sides so that there is no worry about the other side cutting loose. I also read that the factory seats had a flaw in some years of the early heads and that they were prone to dropping . You may wish to have them replaced or check to see if you have to worry about it.

I also bought ARP stainless exhaust bolts and studs.
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post #5 of 21 (permalink) Old 01-03-2018, 03:59 PM
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As you are draining coolant from the system, you might want to change the thermostat if you haven't done so in awhile. Fresh hoses couldn't hurt either.

I was running some errands before Christmas downtown. I stopped behind another car and was idling when he started to drive away. All of a sudden there was smoke everywhere. I thought that poor bastard has some issues but then I realized that the smoke wasn't going away. I turned off the engine and popped the hood turns out that the previous owner fixed a leak at the heater core by cutting half the hose off and then reattaching the fitting, without tightening the clamp to boot. About two liters of coolant came out but I managed to loosen the clamp with a key and push the fitting in as far as it would go before it hit the end of the heater core tube. That was only about 3/8" and part of the reason it blew off.

Thank God it didn't blow off on the highway a few days earlier. Trying go save few bucks could have catastrophic consequences.
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post #6 of 21 (permalink) Old 01-03-2018, 06:42 PM
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Quote:
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Trying go save few bucks could have catastrophic consequences.
Blowing a coolant line is hardly catastrophic
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post #7 of 21 (permalink) Old 01-03-2018, 08:07 PM
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Depends who is driving.
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post #8 of 21 (permalink) Old 01-04-2018, 02:55 AM
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Really??? I was on the highway 2 days before. If it happened then when I was going 80 mph, by the time you figure out your bleeding coolant your engine is cooked. I lost 2 litres in 10 seconds at idle. How much would bleed out at that speed? Like I said, catastrophic.
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post #9 of 21 (permalink) Old 01-04-2018, 04:41 AM
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Quote:
Originally Posted by Flex View Post
Really??? I was on the highway 2 days before. If it happened then when I was going 80 mph, by the time you figure out your bleeding coolant your engine is cooked. I lost 2 litres in 10 seconds at idle. How much would bleed out at that speed? Like I said, catastrophic.
Indeed.

Everything is accelerated & amplified at highway speed and like Flex said, by the time you figure out what's going on - it's all over.


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post #10 of 21 (permalink) Old 01-05-2018, 10:45 AM
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Quote:
Originally Posted by Flex View Post
Really??? I was on the highway 2 days before. If it happened then when I was going 80 mph, by the time you figure out your bleeding coolant your engine is cooked. I lost 2 litres in 10 seconds at idle. How much would bleed out at that speed? Like I said, catastrophic.
Yes really, it's not instantaneous. Happened to me on the highway, saw steam of the back(and there will be a lot of it), pulled over and shut it off. There was no instant melt down you describe.

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