Bad noise at startup

[Klive]

Oil pressure is fine. The issue is only at startup

 

[alfatwo]

Sorry Klive...what I ment to say was does the oil pressure start to rise on the gauge the same time as the noise stops..

Dave

 

[Klive]

Hmmm, I'll check that tomorrow. What are you thinking?

 

[safrane]

Keith hope its nothing serious. ..made me wince when I listened to the vid

 

[Klive]

Thanks Peter.

 

[allandwf]

Hopefully just a driven ancillary.

 

[CatmanV2]

Yes, that does rather set your teeth on edge.

It's quite fast, and I thought stopped *very* suddenly.

Klive, if you start, wait for the noise to stop, stop the engine and then restart immediately, does the noise return? If not, it really does sound like oil starving somewhere. Secondary air perhaps?

C

 

[Phil H]

Is the starter disengaging cleanly when the key is released?

PH

 

[QP4Me]

I would say its the starter not disengaging. The variator noise is a tappet like noise that goes after 1 to 2 seconds.

On one of my old cars, on which the starter sticks to the flywheel, I simply WD40 the Bendix Drive to let it travel freely.

 

[hodroyd]

Not the best noise in the world..?? I would go with maybe the starter motor not releasing also. It does however also sound like it could be a variator noise, which could point to the Oil Accumulator on top of the "V". It does not sound like the Oil Feed Pipe, they normally rattle for a few seconds. If you have access to a ramp, or can at least get under the car, you can check the starter motor to see if it's that and the oil pipe if you want. The next step is to check the variators, one at the top-front of each "V", under the cover. If you have a stethascope, or even a long screwdriver you your ear each side of the "V", you may be able to pinpoint it. If it does it everytime you start the engine, even when warm, I would look at the starter motor. If it does not do it when warm I would look at variators and the accumulator..!!
It could of course be anything on the main front belt for example, such as the AC pump..??

 

[CatmanV2]

I would say its the starter not disengaging. The variator noise is a tappet like noise that goes after 1 to 2 seconds.

On one of my old cars, on which the starter sticks to the flywheel, I simply WD40 the Bendix Drive to let it travel freely.

I have to say, that seems to make a lot of sense. It would account for why it stops so suddenly, and also probably why it doesn't happen when warm.

C

 

[Klive]

Just tried it again. The starter motor is on the correct side but is at the back of the engine and the noise appears to be at the front. So I'm back to thinking the water pump.
The oil pressure comes up straight away when it's started.
After looking at the eurospares diagram am I right that the oil pump and water pump is the same assembly and driven through an auxiliary belt.

 

[Parisien]

Yup, its an integral unit Klive......hope you get it sorted soon and not too costly.....had the car stood long at all before this showed up?

P

 

[Klive]

No, it's used at least every weekend.
I hope to have another head under the bonnet this week and it's off to local specialist.
I'll write up what the pain was when my pockets are empty :-(

 

[alfatwo]

Dont start it up again....If its what you think it is, the crank and big bearings will be the next to go!

It needs the engine coming out and a strip down..

Dave

 

[Emtee]

Agree with Dave. If there's any risk it's the oil/water pump, don't start it up. Klive, can I ask?……what mileage are you on and what year is your 4200?

 

[conaero]

How can I upload a video from my iPad.

Easiest way is to upload the movie to YouTube straight out of the app the paste the link in your thread using the movie strip icon on the toolbar.

Email it to me if your having probs: admin@sportsmaserati.com

 

[CatmanV2]

There is a risk clearly with starting, but if pressure is coming up straight away, does this count against the oil pump?

C

 

[conaero]

Klive I have heard that this can be the idler bearings on the cam chain. What's your mileage?

If it were me the first thing I would do is drop the oil, inspect it for metal deposits then put fresh in.

Then the next thing I would do is call Marios!

 

[Emtee]

To supplement Matt, the earlier cars appear to have a dodgy (potentially) tensioner which can throw stress into the oil/water pump. The noise from your video isn't the tensioner, but it could be the down stream effect on the pump?