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My engine...

Ian964

Ian964

PCGB Member
Member
...looks like this at the moment:

2762560438_4ba2e0ebc9_d.jpg


Did a trackday at Goodwood 3 weeks ago as practice for the Speed Championship sprint, noticed drops of oil on the ground between runs and oil all over the engine cover. Left the car in the garage overnight, and found a 4" pool of oil under it next day. Turns out it was the through bolt seals leaking, Anyway, took it to GT One, and decided to strip the engine right down. Turns out the bottom end is pretty much fine, just need to polish out a couple of marks on the big end crank surfaces. However, they did find a small crack in one head by the inlet valve guide, so a new/replacement head needed there:

2761713107_46ae1de3c5_o_d.jpg


and also one of the bolt holes where the engine mounting yoke is fixed has broken:

2761714261_9d923a1dc7_d.jpg


Apparently this is the second RS they've seen in the last few weeks with this kind of failure, probably due to the stiffer engine mounts.

Oh well, at least I'll have a fresh engine out of this, though it probably means no more track days this year (2000 mile running in needed).

 
Porsche bench run in to 5000Km --- but they say that 1 mile on track is the same as 10 on the road ---

That would only be a couple of track days ?

Seriously, would it make any sense to get it bench run-in ?

Otherwise the miles on road are bound to give you a very numb bum .... which would ruin any feeling left in the seat of your pants ?
 
Sorry to hear the bad news Ian, it sounds like things have turned out worse than you originally thought[>:].
Don't worry about the running-in bit Ian, I will gladly find the time to put miles on your car if you wish...free of charge to a friend![;)][:D].

Seriously Ian, even if your car is out of action for the October day at Oulton, still come along and you can gladly share the drive in my car. Perhaps you could pass on some of those secret Shaun Edwards tips which you have learned! Would be interesting to hear your comments on how my ''RS carpet'' compares to your CUP.
 
Sorry to hear the bad news Ian. I wouldn't worry too much about the running in. About 10yrs ago I rebuilt a 3.2 for hillclimbing, new rings, new bearings, new guides, ran it in for 500 miles, checked it over, new oil & filter then gave it full beans! Never had a problem and it pulled more than the std bhp from day one.

rgds

Tony
 
Thanks for the encouragement guys - I'm already looking forward to getting it back. When GT One re-built the engine in my last 964 (oil leaks again, only a couple of years ago), it came back much stronger, even though it wasn't down on power beforehand. I think I'll keep it pretty much standard as it's the original engine, although they'll do some polishing and crank case windage. I know the 2K miles is more then necessary, last time I think I managed just over 1000 miles before the first track day. It's 200 miles to Oulton, so if I do a few miles and check it over and change the oil just before then, it should be ready to go when I get there!
 
Do you really need a new head or could it be welded? A new one is about £600 exchange from Porsche ! (actually it might be a bit more than that now)
 
ian - if your car is not ready for oulton you're welcome to come up with me.

BTW moving to a new house about 1/2 mile away from you (assuming everything goes through ok) next month

BTW 2 - was driving your old car at Bedford last weekend - still feels top drawer - really strong & well set up
 
Des, a conundrum on the 3.8 question.

My NGT had 3.8 pistons and barrels fitted in Germany early in it's life.

The subsequent UK owners liked to describe it then as an RSR.

It was returned to 3.6 after an oil pump failure --- a big rebuild.

I'll bet that was a **ITE moment.

But I've been told by more than one engine guru that the 3.8 makes less difference than a well sorted 3.6 ?

And original has real cache ?

Surely one buys an old C2 if determine to create the bastard child ? QED ultra cheap race car that is bound to be both better and cheaper than an RS !

Sorry.
 
Thanks for the offers, Matt and Matt - fingers crossed I'll have the car back and maybe even run-in.

Matt B, glad to hear my old car is still going well and used as intended - I'd liked to have kept it, but just couldn't justify 2 964s (also not enough storage space for them). Whereabouts are you moving to?

Lawrence, the problem with welding the head is that you can't tell how far/deep the crack goes - even if the visible part is welded, the crack may just spread unseen. The guys at GT One are going to look out for a used head - they've got a full set spare, but understandably don't want to spilt them. Failing that it's going to have to be a new one.

Stewart, how's your car going now - did you just have a top-end, or was anything more needed?
 
Ian, I've had it back for 3 weeks now and it has got 700km on it so far. It was a top end job but as it was out, I told them to do a complete rebuild. It feels a bit tight still but also feels really strong. The main problem is controlling my right foot.

I'm off to the Ring the weekend after the bank holiday so I will use that trip to finish running it in and then get the oil change and valve adjustment done the week after - then it's good to go so hopefully a Brands Indy track day in September. Hopefully, I'll see you there and pay you back the fiver I owe you.
 
ORIGINAL: ChrisW

Des, a conundrum on the 3.8 question.

My NGT had 3.8 pistons and barrels fitted in Germany early in it's life.

The subsequent UK owners liked to describe it then as an RSR.

It was returned to 3.6 after an oil pump failure --- a big rebuild.

I'll bet that was a **ITE moment.

But I've been told by more than one engine guru that the 3.8 makes less difference than a well sorted 3.6 ?

And original has real cache ?

Surely one buys an old C2 if determine to create the bastard child ? QED ultra cheap race car that is bound to be both better and cheaper than an RS !

Sorry.
Click to expand...

Correct, I had that discussion/research regards 3.8 and it isnt as effective as a good 3.6ltr...maybe slight advantage on Torque but nothing worth straying from Original for!!

BIG bill indeed :rolleyes:

I hated it being badged an RSR...hence lid repaint and correct badges etc!!
 
looking at the pic at least one end is known as it would stop at the valve guide hole. I would have thought it would not be too difficult to machine out and build back up with weld then refinish. Though it would probably be about evens with a second hand head (if you can find one! ). Bear in mind that likely as not GT one will at least machine the mating surfaces anyway. Almost certainly will have to do the replacement at least. But i do take your point , it's a whole lot easier to just replace it.
 
With respect to the 3.8 , as someone once said "there is no substitute for cubic inches" or c.c.'s in this case and it's by far the easiest gain. Porsche did the same after all and you'd think they'd know a thing or two !? The down sides are few but important . The 3.8 cylinder walls are a bit thinner (some might say too thin!) this can cause premature wear, higher temps and oil control issues. Porsche however must have weighed up these problems before introducing the 64' 3.8 and the subsiquent 993 versions. 993 RS engines may have some minor issues but i don't think the B&P's are one of them.
 
Sounds expensive...sorry to hear Ian.

On the upside I had my engine completely rebuilt (not cheap either) using a lot of new parts and it was superb when finished....it got a 60 mile run in before out at Oulton and was fine...and still pulls soooooooo hard!

It will be worth it when you get behind that wheel.
 
ORIGINAL: Ian964

Matt B, glad to hear my old car is still going well and used as intended - I'd liked to have kept it, but just couldn't justify 2 964s (also not enough storage space for them). Whereabouts are you moving to?
Click to expand...

Sandy Lane - Cobham end...as long as it all goes through with no issues..
 
there is a genuine 3.8 RSR 964 Engine with all the ancillaries in this months 911 & Porsche World inc gearbox I think and complete loom etc etc ///
If it's any consolation, my Dub has just had a brand new Mexican 1641, just bought some twin Webers, etc etc etc ete ££££
 
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