yesterday I was test fitting the jeep in my trailer and while trying to load the jeep i gave it gas and it made a noise. I popped the hood and it seems to make the noise if i rev the engine a little harder than normal driving conditions. Its not a grind but it sounds like something rubs. I drove it to work today and it did it once the jeep downshifted when i was trying to pass someone. I let off of the gas and just accelerated slowly and it didn't do the noise again. It hadn't done it before. It just started yesterday. The only changes that i have done to the jeep would not have affected the motor. I'm thinking bad motor mounts? Since when i revved it from under the hood it seemed to happen when the motor would move.
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New XJ owner
- Thread starter xjrick94
- Start date
- Location
- Hammertown, USA
thats entirely possible, the engines do move around a lot when your motor mounts fail.
I'd highly suggest Brown Dogs as replacement. It does add to the vibrations, but keeps things where they belong.
I'd highly suggest Brown Dogs as replacement. It does add to the vibrations, but keeps things where they belong.
- Location
- Hammertown, USA
Do you see witness marks of anything rubbing anywhere?
Could it be a bearing going out in the idler pulley or in the AC pump?
Could it be a bearing going out in the idler pulley or in the AC pump?
Welcome.
Looks like you got new meats also.
hmm still kinda sounds like motor mounts. Another way to check is to place the transmission in gear, stand on the brakes hard and rev the motor to see if you get the noise. If the motor mounts are bad, the engine will twist in the loose/bad mounts. Best to do this in an area with nothing in front of you.
I'm hoping that its motor mounts. It sounds like an easy solution and its a perfect excuse to get a set of brown dogs. While on the subj should i go with the ultra flex or classic?
While reving it in neutral i can see the engine move by the motormount. Would it be a good idea to place a rod by the motor mount and ad pressure to it to make sure that it doesn't move, then rev the engine. This way the rod keeps the motor in place and if it doesn't make the noise then its for sure a motor mount issue? Then I'll replace them.
The jeep came with two almost new procomp extreme MT in the rear and the front tires were shot. I bought two new procomps to match the rears.
While reving it in neutral i can see the engine move by the motormount. Would it be a good idea to place a rod by the motor mount and ad pressure to it to make sure that it doesn't move, then rev the engine. This way the rod keeps the motor in place and if it doesn't make the noise then its for sure a motor mount issue? Then I'll replace them.
The jeep came with two almost new procomp extreme MT in the rear and the front tires were shot. I bought two new procomps to match the rears.
rocknxj
NAXJA Forum User
- Location
- Clinton, Utah (SLC area)
Welcome to the fray.
I suggest buying red
letters soon so you can apply vendor discounts while you buy new upgrades. You'll benefit from lower prices and get that warm feeling that comes with supporting a good club. BTW the Brown Dog mounts are great and have the best customer service around.
I suggest buying red
letters soon so you can apply vendor discounts while you buy new upgrades. You'll benefit from lower prices and get that warm feeling that comes with supporting a good club. BTW the Brown Dog mounts are great and have the best customer service around.
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