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Engine Rattle- '98 TJ
'98 TJ 4.0L Manual
Have developed a rattle somewhere in the engine. Has gotten progressively more noticeable at idle and very low RPM. Just can't seem to pinpoint it over the engine noise. Any typical problems I should look for? Its not in the tranny since the noise can be heard at idle. Water pump is new. Maybe the AC compressor bearings, but AC works fine. |
Re: Engine Rattle- '98 TJ
GTK wrote:
> '98 TJ 4.0L Manual > > Have developed a rattle somewhere in the engine. Has gotten > progressively more noticeable at idle and very low RPM. Just can't > seem to pinpoint it over the engine noise. Any typical problems I > should look for? Its not in the tranny since the noise can be heard > at idle. Water pump is new. Maybe the AC compressor bearings, but > AC works fine. AC compressor is tested by listening to it with the compressor off and the compressor on. If the noise goes away with the compressor on then it's the electric clutch. If the reverse, then it's the compressor bearings. Initial thought is a cracked exhaust manifold. Usually around the lower collector or back on cyl 5/6. How's the cat? is the rattle coming from it? Also check the motor mounts to make sure they haven't gone byebye and let the engine or exhaust rattle up against something. -- DougW |
Re: Engine Rattle- '98 TJ
GTK wrote:
> '98 TJ 4.0L Manual > > Have developed a rattle somewhere in the engine. Has gotten > progressively more noticeable at idle and very low RPM. Just can't > seem to pinpoint it over the engine noise. Any typical problems I > should look for? Its not in the tranny since the noise can be heard > at idle. Water pump is new. Maybe the AC compressor bearings, but > AC works fine. AC compressor is tested by listening to it with the compressor off and the compressor on. If the noise goes away with the compressor on then it's the electric clutch. If the reverse, then it's the compressor bearings. Initial thought is a cracked exhaust manifold. Usually around the lower collector or back on cyl 5/6. How's the cat? is the rattle coming from it? Also check the motor mounts to make sure they haven't gone byebye and let the engine or exhaust rattle up against something. -- DougW |
Re: Engine Rattle- '98 TJ
GTK wrote:
> '98 TJ 4.0L Manual > > Have developed a rattle somewhere in the engine. Has gotten > progressively more noticeable at idle and very low RPM. Just can't > seem to pinpoint it over the engine noise. Any typical problems I > should look for? Its not in the tranny since the noise can be heard > at idle. Water pump is new. Maybe the AC compressor bearings, but > AC works fine. AC compressor is tested by listening to it with the compressor off and the compressor on. If the noise goes away with the compressor on then it's the electric clutch. If the reverse, then it's the compressor bearings. Initial thought is a cracked exhaust manifold. Usually around the lower collector or back on cyl 5/6. How's the cat? is the rattle coming from it? Also check the motor mounts to make sure they haven't gone byebye and let the engine or exhaust rattle up against something. -- DougW |
Re: Engine Rattle- '98 TJ
That was my first thought... exhaust manifold.
-jenn On Tue, 19 Sep 2006 20:36:49 -0500, "DougW" <post.replies@invalid.address> wrote: >>Initial thought is a cracked exhaust manifold. Usually around the >>lower collector or back on cyl 5/6. |
Re: Engine Rattle- '98 TJ
That was my first thought... exhaust manifold.
-jenn On Tue, 19 Sep 2006 20:36:49 -0500, "DougW" <post.replies@invalid.address> wrote: >>Initial thought is a cracked exhaust manifold. Usually around the >>lower collector or back on cyl 5/6. |
Re: Engine Rattle- '98 TJ
That was my first thought... exhaust manifold.
-jenn On Tue, 19 Sep 2006 20:36:49 -0500, "DougW" <post.replies@invalid.address> wrote: >>Initial thought is a cracked exhaust manifold. Usually around the >>lower collector or back on cyl 5/6. |
Re: Engine Rattle- '98 TJ
The rad fan clutch will/can make a rattle when it fails.
Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) GTK wrote: > > '98 TJ 4.0L Manual > > Have developed a rattle somewhere in the engine. Has gotten > progressively more noticeable at idle and very low RPM. Just can't seem > to pinpoint it over the engine noise. Any typical problems I should > look for? Its not in the tranny since the noise can be heard at idle. > Water pump is new. Maybe the AC compressor bearings, but AC works > fine. |
Re: Engine Rattle- '98 TJ
The rad fan clutch will/can make a rattle when it fails.
Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) GTK wrote: > > '98 TJ 4.0L Manual > > Have developed a rattle somewhere in the engine. Has gotten > progressively more noticeable at idle and very low RPM. Just can't seem > to pinpoint it over the engine noise. Any typical problems I should > look for? Its not in the tranny since the noise can be heard at idle. > Water pump is new. Maybe the AC compressor bearings, but AC works > fine. |
Re: Engine Rattle- '98 TJ
The rad fan clutch will/can make a rattle when it fails.
Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) GTK wrote: > > '98 TJ 4.0L Manual > > Have developed a rattle somewhere in the engine. Has gotten > progressively more noticeable at idle and very low RPM. Just can't seem > to pinpoint it over the engine noise. Any typical problems I should > look for? Its not in the tranny since the noise can be heard at idle. > Water pump is new. Maybe the AC compressor bearings, but AC works > fine. |
Re: Engine Rattle- '98 TJ
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45113BBD.8596B43D@sympatico.ca... > The rad fan clutch will/can make a rattle when it fails. > I'm disappointed. I thought you would find some way to blame a bad ground strap <g> |
Re: Engine Rattle- '98 TJ
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45113BBD.8596B43D@sympatico.ca... > The rad fan clutch will/can make a rattle when it fails. > I'm disappointed. I thought you would find some way to blame a bad ground strap <g> |
Re: Engine Rattle- '98 TJ
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:45113BBD.8596B43D@sympatico.ca... > The rad fan clutch will/can make a rattle when it fails. > I'm disappointed. I thought you would find some way to blame a bad ground strap <g> |
Re: Engine Rattle- '98 TJ
"Steve Foley" <steve.foley@DELETE.att.net> wrote in message news:GLeQg.7140$o1.893@trndny04... > "Mike Romain" <romainm@sympatico.ca> wrote in message > news:45113BBD.8596B43D@sympatico.ca... >> The rad fan clutch will/can make a rattle when it fails. >> > > I'm disappointed. I thought you would find some way to blame a bad ground > strap <g> > > LOL Chris |
Re: Engine Rattle- '98 TJ
"Steve Foley" <steve.foley@DELETE.att.net> wrote in message news:GLeQg.7140$o1.893@trndny04... > "Mike Romain" <romainm@sympatico.ca> wrote in message > news:45113BBD.8596B43D@sympatico.ca... >> The rad fan clutch will/can make a rattle when it fails. >> > > I'm disappointed. I thought you would find some way to blame a bad ground > strap <g> > > LOL Chris |
Re: Engine Rattle- '98 TJ
"Steve Foley" <steve.foley@DELETE.att.net> wrote in message news:GLeQg.7140$o1.893@trndny04... > "Mike Romain" <romainm@sympatico.ca> wrote in message > news:45113BBD.8596B43D@sympatico.ca... >> The rad fan clutch will/can make a rattle when it fails. >> > > I'm disappointed. I thought you would find some way to blame a bad ground > strap <g> > > LOL Chris |
Re: Engine Rattle- '98 TJ
It can if the loose ends and banging around the valve cover...
"Steve Foley" <steve.foley@DELETE.att.net> wrote in message news:GLeQg.7140$o1.893@trndny04... > "Mike Romain" <romainm@sympatico.ca> wrote in message > news:45113BBD.8596B43D@sympatico.ca... >> The rad fan clutch will/can make a rattle when it fails. >> > > I'm disappointed. I thought you would find some way to blame a bad ground > strap <g> > > |
Re: Engine Rattle- '98 TJ
It can if the loose ends and banging around the valve cover...
"Steve Foley" <steve.foley@DELETE.att.net> wrote in message news:GLeQg.7140$o1.893@trndny04... > "Mike Romain" <romainm@sympatico.ca> wrote in message > news:45113BBD.8596B43D@sympatico.ca... >> The rad fan clutch will/can make a rattle when it fails. >> > > I'm disappointed. I thought you would find some way to blame a bad ground > strap <g> > > |
Re: Engine Rattle- '98 TJ
It can if the loose ends and banging around the valve cover...
"Steve Foley" <steve.foley@DELETE.att.net> wrote in message news:GLeQg.7140$o1.893@trndny04... > "Mike Romain" <romainm@sympatico.ca> wrote in message > news:45113BBD.8596B43D@sympatico.ca... >> The rad fan clutch will/can make a rattle when it fails. >> > > I'm disappointed. I thought you would find some way to blame a bad ground > strap <g> > > |
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