Cold start noise. New member with GranTurismo S

Zep

Moderator
Messages
9,329
So what's the similar (ish) issue on dry sumps? I thought the oil pressure was always on in those, so it shouldn't happen, but I'm sure I know enough about it....

There is a non-return valve in the head of the left bank of dry sump engines which should hold oil in the heads. This has been known to fail causing a slight rattle. There are a few threads on it.
 

ratbag

Member
Messages
135
I assume you are talking about the variators then? I will talk to the garage about this and the car is also under warranty so hopefully will cover this?
The extended used car warranty sold/given with the car will NOT cover a fault "present at time of sale". The dealer would be expected to repair any faults before sale. The cost of this repair would have to be covered by selling dealer= They will not be happy....
 

Wanderer

Member
Messages
5,791
There is a non-return valve in the head of the left bank of dry sump engines which should hold oil in the heads. This has been known to fail causing a slight rattle. There are a few threads on it.
I had that replaced on mine, still does it though.
 

TimR

Member
Messages
2,731
Im wanting to start the car from prolonged slumber....
I wondering what the accepted ( if any) wisdom is. I want to build oil pressure/supply to the heads before I start it..
Remove injector leads..? Should I pull plugs to let it spin up..? (my instinct is to not remove plugs unnecessarily...!)
 

TimR

Member
Messages
2,731
Is it right to think my 4200; if I turn the key with WOT, the injectors shut off anyway...?
 

Jon_d_h

New Member
Messages
17
Not sure if I’m correct but using a different grade of oil that doesn’t drain out was suggested? I had a similar issue with a cosworth engine being tappy on cold start and a different grade oil stopped that? Correct me if I’m wrong
 

Wanderer

Member
Messages
5,791
Not sure if I’m correct but using a different grade of oil that doesn’t drain out was suggested? I had a similar issue with a cosworth engine being tappy on cold start and a different grade oil stopped that? Correct me if I’m wrong
Not a good idea on a fine tolerance engine like these.

Back in the day you'd see engines with sawdust in the sump to stop them rattling.....
 

Wanderer

Member
Messages
5,791
In the gearbox and diff maybe ;)
Yeah gearbox, sorry! And banana peel.

Not me of course, my mate was a mechanic for Toyota dealer in Bolton he used to tell me from the trade ins in the shop. Just had to last long enough for the trade in to take place!

They had a Citroen SM in once (not bodged), I think that is when I pleaded allegiance to the Trident, even though it was only the engine....
 

Gp79

Member
Messages
1,399
Not sure if I’m correct but using a different grade of oil that doesn’t drain out was suggested? I had a similar issue with a cosworth engine being tappy on cold start and a different grade oil stopped that? Correct me if I’m wrong

10w60 shell helix is an option and was even recommended to me by a specialist to reduce the start up rattle. On a dry sump GS / 4200.
It’s used when racing these engines so can’t be a bad thing.
Has got to be worth doing that for £80 before spending £3k
 

Scaf

Member
Messages
6,627
Not sure if I’m correct but using a different grade of oil that doesn’t drain out was suggested? I had a similar issue with a cosworth engine being tappy on cold start and a different grade oil stopped that? Correct me if I’m wrong
Why would you consider this when you have just bought the car, get it diagnosed properly and back to the dealer for them to fix or reject the car.
 

Evo Cymru

Member
Messages
688
Im wanting to start the car from prolonged slumber....
I wondering what the accepted ( if any) wisdom is. I want to build oil pressure/supply to the heads before I start it..
Remove injector leads..? Should I pull plugs to let it spin up..? (my instinct is to not remove plugs unnecessarily...!)

I just pull the fuel pump fuse in my GS and crank it over for a while to build some pressure before staring after a long period. I have done this for a while and not had any issues (yet!).
 

Ewan

Member
Messages
6,835
You have to ask how much wear/damage can happen, to what parts, over what time. Here we are talking about 1 second of wear, maybe once or twice a week, and only in cold weather. It’s of no consequence. That’s my opinion, and that of several Maserati mechanics I’ve chatted to. Which is why most people ignore it, and why we still see so many cars from this period not yet fixed.

But that’s not to say that it’s not better to have the fix if you can justify the cost.
 

Navcorr

Member
Messages
3,839
Maserati not issuing a recall doesn't necessarily reassure. Certain issues spring to mind but the most obvious recent example was/is Ghibli strut tower cracks.

I haven't re-read the threads but seem to recall Maserati "upgrading" the towers with an insert epoxied into place. Happy to be corrected on that.
Also recall, I think, the work was done under the guise of some sort of scheduled maintenance. It sounded far too sketchy to be anything other than an attempt to "get away with it". Did Maserati NA refuse to supply CA with a replacement tower? Think he had to get one shipped over from the UK.
 

DaveT

Member
Messages
2,831
I haven't re-read the threads but seem to recall Maserati "upgrading" the towers with an insert epoxied into place. Happy to be corrected on that.
Also recall, I think, the work was done under the guise of some sort of scheduled maintenance.

Pretty sure that was the case re the insert but not sure whether it was a recall or something else. Certainly I had it done on my Ghibli just after purchase.
 

Jon_d_h

New Member
Messages
17
Why would you consider this when you have just bought the car, get it diagnosed properly and back to the dealer for them to fix or reject the car.

not considering it but hoping that is not what they will do to cue the issue temporarily