Bad Engine Mount – Diagnose and Repair

Bad Engine Mount – Diagnose and Repair


their viewers welcome back to the semi-auto Channel show this 2006 Buick Lucerne here it’s got the 3.8 liter in it I just came in first just some normal routine work and I took it on a test drive and I noticed something a little bit concerning that the customer didn’t make any mention of and that was a really harsh clunk sound when you took off of the vehicle when your very first took off like from a dead stop or from a stop sign or yeah even if you’re going down the road and you’re at steady cruise and you accelerated you’d get a very distinct noticeable funk coming from the engine compartment it’s a pretty common sound for this type of problem I believe the engine has a bad engine mount or a bad motor mount some people call them this particular car has three different engine mounts got one on the front engine one on the rear and also it’s one on the training it’s a pretty common configuration it sounds pretty harsh it sounds like the engines coming up and hitting the hood almost so we’re going to take a peek of that that’s the case I’m going to show you how to replace it so we’re going to check out this front engine mount first listen when I suspect it’s bad I see a little bit of a tear on it we’re just going to go ahead and start it up we’re going to put it in Drive and then we’re going to torque the engine a little bit because the engine should rotate in this direction and that’s the one I suspect is bad that one takes quite a beating on these vehicles go ahead serve I put it put it in Drive order for on a break I see a little bit of movement there I go ahead and give it some throttle er [Music] okay just holds right study on the gas l’amour l’amour L’Amour yeah okay got office oh yeah so we can see that one now we’re going to go underneath and look at the other one all right so here’s that same melt from underneath we’re going to go ahead and do the same thing got to see it under here you got it dry okay go ahead and torque the throttle okay that’s good well you can see how much that one move now this here game out towards a really into the oil filter with one here’s back by the right output insane I’m going to put it in reverse this one we got 14 from the other way okay go ahead and give it some throttle [Music] okay that’s good you put a part shut it off so we can see that when they’re still attached the rubber you know does stretch slightly which is normal because these are gonna you know cushion the vibration so you are going to have some movement but this one doesn’t have that harsh you know clunk where it comes right up out where the rubber is completely tore away all right so I spoke to the customer we got the okay to do this I’ve got the new engine mount on its way it’s pretty obvious to see what the problem was here and it was pretty obvious driving a car it’s quite a harsh clunk of course you know we were putting in a you know under much more severe load we’re actually driving it and it’s it’s much more pronounced you know like I said it really sound like thing was about to come through the hood of the car so we’re going to go ahead an get that fixed up for him so these aren’t too awful to change before we pick it up in the air we’re going to take we’re going to get this nut off the top of it so we don’t have to fiddle with that because we’re going to support the engine and then we have to pull this engine bracket off and then take the mount out so well it’s down here on the ground we’re going to take and pull that nut off looks to be an 18 millimeter down here the swivel socket a little edge my pencil here baby takin pop the nut off the bottom here looks like a 21 now there is this engine bracket here we’re gonna have to take off there’s one bolt on the top of everybody knock sensor it will snug big it do not too bad and then it’s the two on the bottom here but before you do that we have to support the oil pan oh we’re going to tripod the block of wood there the way the engine doesn’t do something silly on us see where’d we leave off I’ll tend to go out to the Mack truck format your bets warranty here got us a tripod for siege who is turn yeah we’re gonna put just a little little tension on it yeah we can see that mount spinning around in our loose now we’ll pull the bracket off the front of the engine here so grab these two down here the one up top I don’t know if I can show you it right next to the dipstick tube you’ll see the knock sensor up there and looks like an 18 millimeter also sleep when you up in there just above that out puts crowd by the way I’ve got my bent ratchet thing going shopping around there hopefully give it the classic reach-around move yeah there we go okay can get your hand shield up in there I’ll show you that hole to get a bell so just another bowl wait three is the engine up just a little bit more here see we didn’t take the nut off stop you kind of stuck a little bit in the pitch amount there I think there’s a locator pin yeah let me get a screwdriver there we go and the engine of guess both sides you can take it safely so there’s your mount that’s that bolt that was up in the top so obviously get two bolts here that single bolt on the top what was holding us up on the bottom is we’ve got the stunt that goes through from the mount but this little guide pin there was hung up slightly so it should be able to lift that mount right out and then you can see the guide pin that was on there let’s talk about we can also see Senja mountains broke right open good diagnosis anyways got the new mouth over right here yeah also like I said mentioned has a guide pin on it that we could take hopefully there we go pretty much how to reverse the process now get a bracket back home it solid will get the weight of the engine sitting back down on that mouth smug things up overall pretty easy job really then I don’t use this ratchet that often but when I do it’s pretty handy I’m gonna go ahead we’re going to let the weight right back down on this thing so if you’re doing this on the ground you just have to use a floor jack as all you know just put a block with there a new old pad let’s use a floor jack whoa whoa whoa mrs. o we’re doing a video go on no does it matter with some orange typically not so nice well 50 percent of the time every time all of the cleaner there’s no other actually matter what from the dead the air let’s go let’s go down come on nuts back on their set the torque to spec here up back on the top their lock nuts it turned a little stiff there tension there we go we’re done alright guys that’s it that’s engine mount diagnosis and replacement here on this o six Buick Lucerne so you can use some of the methods that we use here to check your own engine mounts you don’t have somebody help you up at the car and drive you know torque the throttle a little bit see how much movement you have see if you have any separation this one was pretty extreme here you know where it was completely you know ripped away you know not only on that side but on that side too so she was pretty well hammered so it’s pretty easy to tell particularly when driving it but you know most cars are the same you know the bandage and mounts they can cause various types of concern whether it was like this car where I was just having a harsh clunking on acceleration I’ve seen them before to where the mounts go bad and they’ll start to you know start to sink down and you’ll get some driveline vibration so be mindful of that depending on the style of the engine mount it may not clunk but it could cause the engine sit in there cockeyed you know binding up the CV shafts you know for the drive style system so yeah hope you guys find this video useful be sure to give it a thumbs up if you did what else that’s it Google+ Facebook check us out there leave your comments in the comment box below and as always viewers remember if I can do it you can do it thanks for watching [Music]


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