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Old 09-21-2015, 03:49 PM
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Old 12-05-2015, 11:09 AM
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Originally Posted by odgreen
4.7 v8. Junk *** engine
Agreed 100% lol
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Old 12-05-2015, 12:16 PM
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Name: ForumRunner_20151205_111537.png Views: 258 Size: 435.8 KB



Look what somebody used for a freeze plug on my engine
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Old 12-05-2015, 01:30 PM
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Originally Posted by jdjonesdr
My 90' does the same thing. I've changed the thermostat twice, the sending unit twice, checked the wiring, and even changed the gauge.

It still "heats up" to about 130, and there she sits. The only time it's gone higher is once when I left the cap off by mistake after changing the coolant, and it overheated when it all leaked out.
Done.
Mine topped out at 210 while idling then dropped a tad. Of course when I pulled the sending unit plug the retaining tab broke. Such is life.
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Old 12-05-2015, 01:32 PM
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Originally Posted by RSWiser
Attachment 280050



Look what somebody used for a freeze plug on my engine

What is a drain plug?
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Old 12-05-2015, 02:44 PM
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update. Jeep won't start now. Can a TPS cause a no start?
Cranks. Wants to fire just won't.
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Old 12-05-2015, 04:32 PM
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Originally Posted by BrawnyDog
What is a drain plug?
I think so. It is leaking. This will be my project in a few weeks.

It has held for the 4 years I have owned the Jeep and is only leaking after I drive and get it up to operating temp then let it sit.

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Old 12-05-2015, 04:38 PM
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Originally Posted by ITTs_Cole
update. Jeep won't start now. Can a TPS cause a no start?
Cranks. Wants to fire just won't.
No
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Old 12-05-2015, 04:58 PM
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On the 4.0 1999 Cherokee, it the dent in the connecting pipe to the exhaust manifold to create back pressure?

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Old 12-05-2015, 05:08 PM
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Originally Posted by RSWiser
On the 4.0 1999 Cherokee, it the dent in the connecting pipe to the exhaust manifold to create back pressure?

RSWiser
I believe it's for drive shaft clearance
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Old 12-05-2015, 05:20 PM
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Originally Posted by RSWiser
On the 4.0 1999 Cherokee, it the dent in the connecting pipe to the exhaust manifold to create back pressure?

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Originally Posted by FruitSnacks
I believe it's for drive shaft clearance
It's to heat the exhaust for catalytic converter efficiency. If you remove it, you'll gain a couple horsepower and lose a little torque
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Old 12-05-2015, 05:39 PM
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Originally Posted by NewKindOfClown
It's to heat the exhaust for catalytic converter efficiency. If you remove it, you'll gain a couple horsepower and lose a little torque
You'll gain horsepower, torque and throttle response. Be sure to have your muffler guy tuck the pipe up close to the motor when he builds it.
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Old 12-05-2015, 06:25 PM
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Originally Posted by cruiser54
You'll gain horsepower, torque and throttle response. Be sure to have your muffler guy tuck the pipe up close to the motor when he builds it.
I've been told low RPM torque suffers, but I don't have the requisite knowledge of exhaust flow to argue the point
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Old 12-05-2015, 07:00 PM
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Originally Posted by crabmushrooms5
If I order a bacon egg and cheese in Canada will they give me ham or bacon
Bacon. "Canadian bacon" is what we call "back bacon". If you order ham you'll get ham lol.
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Old 12-05-2015, 07:01 PM
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Originally Posted by NewKindOfClown
I've been told low RPM torque suffers, but I don't have the requisite knowledge of exhaust flow to argue the point
Maybe with a totally amputated exhaust. Removing the crush should help scavenging by reducing backpressure. But scavenging (and requisite velocity) is still maintained because there's a pipe.

As I've understood it, anyway
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Old 12-05-2015, 07:06 PM
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Originally Posted by salad
Maybe with a totally amputated exhaust. Removing the crush should help scavenging by reducing backpressure. But scavenging (and requisite velocity) is still maintained because there's a pipe.

As I've understood it, anyway
I drove my Comanche with an undefined but severely amputated exhaust system for months. It was awful for many reasons, but it was better performing than the crushed exhaust and broken muffler that were previously on it.

Bottom line, I don't think anybody is gonna notice a difference with the downpipe crush there or removed. Removing it may make it more difficult to pass emissions in any particular place, but it isn't considered emissions equipment.
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