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Engine Carrier

Steve Brookes

Steve Brookes

Moderator
Was the engine carrier on the RS strengthened from the outset?

The reason for my question is that the advice coming out of discussions on Rennlist is to strengthen the engine carrier, when replacing the engine mounts on a 964 with the RS versions. As far as I can see on PET the engine carrier for the RS is the same as other N/A 964s.

If it wasn't strengthened on the RS from the outset, have any of you had it modded later? Has anyone been unfortunate to have a carrier break?

I thought if anyone should know, you guys would. TIA [:)]
 
Steve,

There was an instance earlier this year with a car bought by a PH'er (LuckyP). He documented the problem on PH but his engine carrier broke quite spectacularly while on a track day at Snetterton (I think).

I've seen mention - also on Rennlist - where people have had strengthening ribs welded to the carrier up near the mounting points in an attempt to avoid fractures. I suspect the potential problem is worse if you use more rigid engine mounts like the Wevo parts. The RS mounts are also stiffer than the standard C2/C4 parts so you might expect more breakage issues with the RS'es although I can't recall anyone complaining. Maybe Melv will know better.

Regards

Dave
 
Brksy16!

Original is not strengthened.
I HIGHLY recommend to have it strenghtened, mine broke after a few years of Nordschleife, GTP competitions and track days. I was very lucky that it happened at low speed after the GTP event. You´ll find your engine on the road then, don´t even want to think about a high speed breakdown on the Nordschleife.

I got a strenghtened one from Konrad Motorsport, they reinforced the standard part, AFAIK that´s what all the race teams did. So, any race team with experience will know what to do and how to do it.

Good luck!

All others: I thought this is general knowledge, so I never posted a warning.

Melv: Good for putting on the list for technical info?


Rgds

Hacki
 
I think the engine carrier is the same across all versions. One problem you can get, especially on the cup cars which have solid engine mounts, is that the bolt holes in the crankcase where the engine carrier is bolted in can break. My engine was out recently for a rebuild, and GT One found that just this had happened and mentioned that they had seen the same thing on another RS recently. We had to get the crankcase welded up and a new hole tapped. You can see it here:
2761714171_42cbbb25a3_o_d.jpg
 
Thanks Hacki and Dave for answering my question. I was aware of Pete's (LuckyP) failure on his C2 but hadn't heard of any failures on an RS. Obviously I'm now aware of Hacki's carrier failing on his cup.

I guess this is just showing that this was not expected (not even on the RS and cup) when the cars were designed and rolled off the production line all those years ago. Now there is enough experience to say that is essential to get the carrier strengthened.

For those interested a gusset plate to weld on can be purchased quite cheaply ($75) from Rennline in the States.
 
Which bit do you term the engine carrier? -if it's this, I had a split in the beam across the rear engine mounts welded up a few yrs ago.

All appear to be same size regardless of model of 964.
 
ORIGINAL: Richard Dawson

Does this issue afflict 993s?
Click to expand...

Don't know!

ORIGINAL: ChrisW

Would this normally be visible at service ?

Or the subject of a manufacturers "recall" ?
Click to expand...

Recall unlikely(! You live in hope!!) and you would only notice it with engine out where Ian's failed. Fortunately mine cracked from the visible top down.
 
I noticed you asked the question on the 993 RS forum Melv.

I suppose pending any answers on there the next question would be will an updated 993RS engine carrier fit a 964RS?
 
I was leading the field but my engine dropped out ...

What next ?? Have your engine taken out to see if it was about to fall out ?

Would it be noticed at a clutch change ?
 
ORIGINAL: ChrisW

What next ?? Have your engine taken out to see if it was about to fall out ?
Click to expand...

To be safe, have the carrier taken out and have it reinforced.

Rgds

Hacki
 
Thanks Hacki, that simple ....

How serious is the risk ?

How much is involved ?

Is the 993 engine carrier the same as the 964 ? !

Well, there is so much knowledge on this forum ? ! Thanks !
 
ORIGINAL: ChrisW

Thanks Hacki, that simple ....

How serious is the risk ?

m2.gif
Hard to say, I know of a few broken engine carriers.

How much is involved ?

m2.gif
Depends on when it happens. Mine broke at very low speed. Damage was the distributor (hits the body when the engine comes down), silencer, engine carrier of course, transport home and repair cost. Was about 2.500,-- EUR, but I know the guy running the shop very well. So the potential risk is quite some money.... Especially when it breaks at higher speed.
Having the engine carrier reinforced should be less than 300,-- EUR. Depends on the shop that does the job!

Is the 993 engine carrier the same as the 964 ? !

m2.gif
No idea, check the partnumbers!

Well, there is so much knowledge on this forum ? ! Thanks !
Click to expand...

You´re welcome!

Hacki
 
ORIGINAL: MoC2S

ORIGINAL: brksy16

ORIGINAL: Richard Dawson

Does this issue afflict 993s?
Click to expand...

There have been plenty of reports on Rennlist of 993 carriers breaking aswell.
Click to expand...

Can't say I've ever heard of one breaking .. but there are 3 993 part no carriers - standard, RS and TT ..

cheers, Maurice [:D]
Click to expand...

As I said Maurice, there are reports of 993 carriers breaking on Rennlist. Here are a couple of examples:

http://forums.rennlist.com/rennforums/showthread.php?t=211735

http://forums.rennlist.com/rennforums/showthread.php?t=449939

It seems that it happens mostly on tracks rather than just with normal use. I'm not saying it's common (with the 993 or 964) but it could be expensive for anyone who is unfortunate enough to have it happen to them. [&o]

 
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