993 engine mounts question ... yes another
Discussion
I've read on here (but I can't find the pic) that worn engine mounts can cause all kind of trouble where shift change (especially from 1st to 2nd) is concerned.
Mine is a real pain not only going from 1st to 2nd but also clutch pickup to the point that it hinders a quick get away.(Embarassing when against a tarted up Nova with large rear pipe, at the lights)
The clutch is fine, gear change in any other gear is fine, so I'm assuming engine mounts.
My question is, can you tell by looking at them if they are worn? If so, please see pic above, do these look ok?.
The 993 has done 113000 miles and I can't see any paperwork of them being replaced. Though I'm pretty average with a spanner, I'm also tempted to have a go replacing them myself if needed.
)
Wozy68 said:
Just had a quote for replacements from Porsche. The C2 mounts are nearly twice the price of the C4 or Turbo mounts. 
Any idea why?
iirc they're fluid filled & allow for both left to right & for & aft movement. the 4wd models are simpler rubber items that don't allow for for & aft movement.Any idea why?
iirc c2 ones are more expensive than rs ones.
i can't see your images at the moment but get them checked out by someone who kows what they're on about. imho engine mounts are another of the 911uk 993 forums great myths-one bloke changes them, says they cure all evils & then everyone else follows suit, not wanting to admit they spend a fortune on replacing parts that won't improve their gear change.
1st to 2nd graunches in a 993 are usually selector forks/synchros & no amount of engine mount/golden rods/transmission oil/shift bush changes will improve things greatly
Wevo and Rennline in the U.S offer solid and semi-solid mounts for slightly less dosh than OEM one's.
I went with the Rennline solids ones and was happy with the results. With the old worn ones you could feel that the engine and chassis were moving independently of each other, new mounts solved that. Not sure if the 993 uses the same engine carrier as the '64's but I had my engine carrier reinforced (Rennline part again)at the same time as the new mounts for peace of mind.
This work plus fresh trans fluid def. improved my 1/2 shift when cold and overall the car felt much more together as it were.
I defer to Cragswinter on the whole 993 trans subject as results may vary
I went with the Rennline solids ones and was happy with the results. With the old worn ones you could feel that the engine and chassis were moving independently of each other, new mounts solved that. Not sure if the 993 uses the same engine carrier as the '64's but I had my engine carrier reinforced (Rennline part again)at the same time as the new mounts for peace of mind.
This work plus fresh trans fluid def. improved my 1/2 shift when cold and overall the car felt much more together as it were.
I defer to Cragswinter on the whole 993 trans subject as results may vary
Have a look at: http://p-car.com/diy/motormount/ I fitted C4 mounts to my C2 and all works well. The C4 mounts are slightly firmer than the C2 ones, but not as firm as RS.
Hi, this subject has just about been done to death on the 911uk forum. I checked out my mounts after reading about them on the forum and I'm glad I did, they were shot.... I had a knocking noise coming from the back which I put down to a knocking spoiler, but it turned out to be a worn mount knocking on the chassis. The wear mark on the old mount was pronounced.
Definately go for the C4 mounts even if you have a C2. They are half the price of the C2 mounts and firmer, although it makes no difference to NVH.
They made a significant difference to the way the car drives though. The gearbox and engine used to have a "snatchyness" when changing gear or when on and off the throttle, especially at low speeds. The new mounts have cured this, and no more knocking noises! Had I known it was going to make such a difference, I might have fitted Wevos with the softer cushions, but the C4's are a good compromise and work well.. It's a pretty easy DIY as well. If you don't mind taking off the engine tray and jacking up the engine a little to support it, it should be no problem for the average DIY'er.
Definately go for the C4 mounts even if you have a C2. They are half the price of the C2 mounts and firmer, although it makes no difference to NVH.
They made a significant difference to the way the car drives though. The gearbox and engine used to have a "snatchyness" when changing gear or when on and off the throttle, especially at low speeds. The new mounts have cured this, and no more knocking noises! Had I known it was going to make such a difference, I might have fitted Wevos with the softer cushions, but the C4's are a good compromise and work well.. It's a pretty easy DIY as well. If you don't mind taking off the engine tray and jacking up the engine a little to support it, it should be no problem for the average DIY'er.
citori said:
.... I had a knocking noise coming from the back which I put down to a knocking spoiler, but it turned out to be a worn mount knocking on the chassis. The wear mark on the old mount was pronounced.
Definately go for the C4 mounts even if you have a C2. They are half the price of the C2 mounts and firmer, although it makes no difference to NVH.
They made a significant difference to the way the car drives though. The gearbox and engine used to have a "snatchyness" when changing gear or when on and off the throttle, especially at low speeds. .
This is what I have, a snatchyness. It makes the whole gear change/clutch pickup to set off smoothly very difficult and is either on or off.Definately go for the C4 mounts even if you have a C2. They are half the price of the C2 mounts and firmer, although it makes no difference to NVH.
They made a significant difference to the way the car drives though. The gearbox and engine used to have a "snatchyness" when changing gear or when on and off the throttle, especially at low speeds. .
Excellent, I'll try the c4 mounts , it shouldn't cause any damage using these than the correct C2 mounts then?
Crag, see where your coming from. Lets see, they have never been replaced so I'm guessing its time anyway,
Thanks to everyone for their help.
cragswinter said:
iirc they're fluid filled & allow for both left to right & for & aft movement. the 4wd models are simpler rubber items that don't allow for for & aft movement.
IIRCBoth the C2 and C4 have fluid filled engine mounts. The difference between the two being that the C2's mounts are damped up and down. The C4's however are damped in one direction only due to the torque tube removing the need for damping in the other direction
Yes these in the images are shot. Citori is right in his post.
Replacement is not a panacea for all woes but for my part replacement certainly tightened up the back end and the car is less snatchy at low speeds in traffic. It didn't solve the slightly notchy 1st to 2 nd change on a very cold box but well worth doing IHMO. I have a C4 so obviously went for that but consensus seems to be that this is a good route for C2 variants as well.
Cheers
Replacement is not a panacea for all woes but for my part replacement certainly tightened up the back end and the car is less snatchy at low speeds in traffic. It didn't solve the slightly notchy 1st to 2 nd change on a very cold box but well worth doing IHMO. I have a C4 so obviously went for that but consensus seems to be that this is a good route for C2 variants as well.
Cheers
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