Motor mount question?
Thread Starter
CF Veteran
Joined: Jan 2015
Posts: 1,508
Likes: 5
From: Oregon Coast
Year: 1999
Model: Cherokee
Engine: 4.0L I6
99 auto 4 wheel drive.
So I just replaced my motor mounts with the rubber mounts from Brown dog. I am now having two weird issues.
1) the front pcv valve is rubbing on the hood. Has anyone seen this happen before.
2) it is vibrating a lot. I installed to the directions, leaving the bolts a bit loose so one washer could spin. The vibration is always there but worse when the engine is loaded such as in gear and stopped or climbing a hill.
Any advice is greatly appreciated.
So I just replaced my motor mounts with the rubber mounts from Brown dog. I am now having two weird issues.
1) the front pcv valve is rubbing on the hood. Has anyone seen this happen before.
2) it is vibrating a lot. I installed to the directions, leaving the bolts a bit loose so one washer could spin. The vibration is always there but worse when the engine is loaded such as in gear and stopped or climbing a hill.
Any advice is greatly appreciated.
Thread Starter
CF Veteran
Joined: Jan 2015
Posts: 1,508
Likes: 5
From: Oregon Coast
Year: 1999
Model: Cherokee
Engine: 4.0L I6
I just verified it was the right part and the right side. It appears its the only rubber connector and not the elbow that is hitting. I don't think you can install them upside down so we are good there.
CF Veteran
Joined: Jan 2013
Posts: 1,029
Likes: 35
From: Colorado
Year: 1991 2-Door
Model: Cherokee
Engine: 4.0 liter
Did you loosen your Tranny mount (or better yet replace it at the same time)? I can't figure why you have to much vibes? When I installed mine (Rubber also) I over tightened my and had horrible vibes, loosened it the right way and no more vibes.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
99 auto 4 wheel drive.
So I just replaced my motor mounts with the rubber mounts from Brown dog. I am now having two weird issues.
1) the front pcv valve is rubbing on the hood. Has anyone seen this happen before.
2) it is vibrating a lot. I installed to the directions, leaving the bolts a bit loose so one washer could spin. The vibration is always there but worse when the engine is loaded such as in gear and stopped or climbing a hill.
Any advice is greatly appreciated.
So I just replaced my motor mounts with the rubber mounts from Brown dog. I am now having two weird issues.
1) the front pcv valve is rubbing on the hood. Has anyone seen this happen before.
2) it is vibrating a lot. I installed to the directions, leaving the bolts a bit loose so one washer could spin. The vibration is always there but worse when the engine is loaded such as in gear and stopped or climbing a hill.
Any advice is greatly appreciated.
Can you take a photo of this "PCV Valve" and post it here.
The front fitting is not a valve, but just an open tube elbow that fits nearly flush with the valve cover.
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Senior Member
Joined: Feb 2011
Posts: 897
Likes: 2
From: NJ
Year: 2004 WJ, 1998 XJ
Model: Grand Cherokee(WJ)
Engine: 4.7 HO
I'm assuming you loosened the long bolt going through the rubber part of the mount? Does anyone know what the proper torque for this bolt should be?
Banned
Joined: Feb 2014
Posts: 2,379
Likes: 18
From: Florida
Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
Post some pics of the mounts and the elbow that is rubbing the hood. It would be easier for folks here to help if they can see what you're talking about.
Look at your Brown Dog order and see if you ordered model CU2572-0K2 or model CU2572-1K2. The "1" is the taller mount to raise the engine 1". Unless you had drive line issues, you wanted the "0" version that does NOT lift the engine.
Regarding vibrations, these things are not going to feel like OEM because the rubber BD uses is harder than stock. However, they do seem to break in over time. Mine turned my truck into a soothing massage chair when first installed. Within a few hundred miles it calmed down. Installing the 1" lift mounts could also introduce some vibrations by changing the drive line angle, so you still want to check to make sure you bought the right mounts.
Look at your Brown Dog order and see if you ordered model CU2572-0K2 or model CU2572-1K2. The "1" is the taller mount to raise the engine 1". Unless you had drive line issues, you wanted the "0" version that does NOT lift the engine.
Regarding vibrations, these things are not going to feel like OEM because the rubber BD uses is harder than stock. However, they do seem to break in over time. Mine turned my truck into a soothing massage chair when first installed. Within a few hundred miles it calmed down. Installing the 1" lift mounts could also introduce some vibrations by changing the drive line angle, so you still want to check to make sure you bought the right mounts.
Thread Starter
CF Veteran
Joined: Jan 2015
Posts: 1,508
Likes: 5
From: Oregon Coast
Year: 1999
Model: Cherokee
Engine: 4.0L I6
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
That's the wrong fitting in the valve cover. You need the low profile fitting like this:
http://shop.advanceautoparts.com/p/carquest-by-bwd-engine-crankcase-breather-element-ec242/10434533-P
Edit: If the link won't open, copy it and paste it in your browser window.
http://shop.advanceautoparts.com/p/carquest-by-bwd-engine-crankcase-breather-element-ec242/10434533-P
Edit: If the link won't open, copy it and paste it in your browser window.
Last edited by CCKen; Sep 27, 2015 at 01:46 PM.
Thread Starter
CF Veteran
Joined: Jan 2015
Posts: 1,508
Likes: 5
From: Oregon Coast
Year: 1999
Model: Cherokee
Engine: 4.0L I6
Well that makes sense. I will see if I can get it locally and replace it.
CF Veteran
Joined: Jan 2013
Posts: 1,029
Likes: 35
From: Colorado
Year: 1991 2-Door
Model: Cherokee
Engine: 4.0 liter
No torque setting. The nut they provide will not back off. Just should be snug to were you would start to torque it. I even backed it a half turn from there. I think the other poster is right over time it smooth's out. Mine is hardly noticeable. (might be so used to it also).


