Engine mount diagnosis

[Andy_vx]

I've just bought a clio cup 172, pleased with the car but there are a couple of issues.

Under hard acceleration there's a horrible grinding / knocking which i'm pretty sure is engine mounts. Is there one that normally goes first and what's the best way to check them? I see the offside mount is easy to get to but not sure about the nearside. Also, are there 2 bottom mounts and will they need replacing? Was going to jack the engine up from underneath and replace them that way.

Seen that my local part supplier can get them in stock but i've also seen that K-tec ones, I don't want to spend loads on this so are they worth the extra money?

TIA

Andy

 

[MarkX]

Hi, I'm in the middle of trying to eliminate my knocking on acceleration.

I've changed the dogbone bushes, which you'll see underneath, powerflex ones are ~ £40

The upper gearbox mount is under the battery, support the gearbox from below and it's pretty simple to change from above with the battery removed, think this is why mine's knocking!! I'm goimng with Vibratechnics ones, same as KTR

 

[Andy_vx]

Ahh that's great thanks very much. Where do you buy the Powerflex bushes from, i have them on another car and have been pleased with the results.

 

[MarkX]

Ahh that's great thanks very much. Where do you buy the Powerflex bushes from, i have them on another car and have been pleased with the results.

Euro car parts

 

[Cub.]

Best way to check them is put the handbrake on, then keep finding the biting point and making the car strain slightly against the brake, without moving.

If the knocking occurs, keep doing it and get a friend to listen to see which side / where it is occurring. Also, pop the bonnet and get the friend to look to see if the engine mount moves under load with the handbrake on, as describes above.

By holding it on the brake, you eliminate it being anything wheel / brakes / rotational wise. If there is movement / the noise, it will be one of the engine mounts.

In terms of solid engine mounts like vibratechnic / KTR ones - they are great in terms of being more robust, eliminating engine movement etc. I have them on my track car. Downsides - more expensive and they will once fitted transfer the engine movement back into the cabin at idle etc.

 

[Andy_vx]

Hi Cub, thanks for the reply. We did try putting the car in gear with the handbrake on and making it move but it still wasn't obvious which one was broken. When you're driving it sounds as if it's the offside that's gone but not 100%. I think the best thing to do is just take them out and have a look.

Yeah ah I must admit I was surprised the amount of difference the power flex inserts made to vibration in another car of mine so I imagine the Vibratechnic mounts are even worse. I think we'll end up replacing them with standard mounts and hope they last.

Thanks for the advice.

 

[Gandi69]

A lower mount is the best bang for the buck, it'll also mask other mounts being slightly past their best (aslong as they aren't utterly utterly fucked) but it's worth changing them anyway

 

[danyeates]

Turns out it was the offside engine mount. It was completely sheared in two. So need to get one of those on order. The two gearbox mounts were checked and seem to be ok. Might leave them for now.

 

[FLOBALOB]

Dont know how well you checked the one underneath the battery , but the cast aluminium housing that its mounted in ( it also acts a batttery tray ) are known for cracking , usually just above where the very rear bolt is. The actual rubber mount itself might look ok but if the thing its mounted in is cracked then they cause a horrible noise. My brother has just bought a 172 with exactly that problem and a mate has had one crack in the same place also.At least worth checking as it doesnt take long.

 

[MarcB]

Picture of the mounts

 

[danyeates]

We did take the battery and air box out to check it. It all looked ok. Didn't find any damage to the mount or the bracket, but thanks for the advice. We will double check it.

Engine mount....

 

[Mash.]

Best way to check them is put the handbrake on, then keep finding the biting point and making the car strain slightly against the brake, without moving.

If the knocking occurs, keep doing it and get a friend to listen to see which side / where it is occurring. Also, pop the bonnet and get the friend to look to see if the engine mount moves under load with the handbrake on, as describes above.

By holding it on the brake, you eliminate it being anything wheel / brakes / rotational wise. If there is movement / the noise, it will be one of the engine mounts.

In terms of solid engine mounts like vibratechnic / KTR ones - they are great in terms of being more robust, eliminating engine movement etc. I have them on my track car. Downsides - more expensive and they will once fitted transfer the engine movement back into the cabin at idle etc.

Bit off topic but, when changing the dog bone mount is it best to support gearbox or is it just simpley unbolt then replace bushes, bolt back on? thanks in advance

 

[JonC219]

Bit off topic but, when changing the dog bone mount is it best to support gearbox or is it just simpley unbolt then replace bushes, bolt back on? thanks in advance

Unbolt and replace

Ie the gearbox won't fall out when you take it off

 

[danyeates]

New top engine mount (drivers side) and all is much better now. No more horrible noises!

 

[Shroom]

I've just bought a clio cup 172, pleased with the car but there are a couple of issues.

Under hard acceleration there's a horrible grinding / knocking which i'm pretty sure is engine mounts. Is there one that normally goes first and what's the best way to check them? I see the offside mount is easy to get to but not sure about the nearside. Also, are there 2 bottom mounts and will they need replacing? Was going to jack the engine up from underneath and replace them that way.

Seen that my local part supplier can get them in stock but i've also seen that K-tec ones, I don't want to spend loads on this so are they worth the extra money?

TIA

Andy

Unfortunately, I have just had the 'WORST'' experience ever with this company. I have even felt the need to re-join Facebook in order to make my complaints heard! I'm not into complaining and this is the first time I have used Facebook for this, yet after the service that I have experience I feel other should know. Having spent over £2500 in three separate orders, of which they were delivered to the wrong address, incorrect parts, some parts not even included! Regarding advice from them, watch out who you speak to, otherwise it could end up costing you dearly! Be warned

 

[Shroom]

Unfortunately, I have just had the 'WORST'' experience ever with this company. I have even felt the need to re-join Facebook in order to make my complaints heard! I'm not into complaining and this is the first time I have used Facebook for this, yet after the service that I have experience I feel other should know. Having spent over £2500 in three separate orders, of which they were delivered to the wrong address, incorrect parts, some parts not even included! Regarding advice from them, watch out who you speak to, otherwise it could end up costing you dearly! Be warned

 

[mark smith87]

I've got K Tec mountings on mine a nod Powerflex dogbone bush and the car is superb under hard acceleration on the track and road. No transfer of vibration into the car either. Well worth the money. Had them on my car about 4 years now.

 

[Shellcase]

sorry for jumping the thread -
how difficult is it to replace the bushes on the ph1 dogbone? what tools are needed?