OIl Problem I think

I'm not an expert but I wouldn't think so. What about the timing?

 

There is nothing that changing the belts alone could have done to alter oil feed. The oil is fed thru passages that run up from the block, thru the heads, so it cannot be acccessed in this repair. To check for oil feed, pull the oil fill cap. You should see oil coming out between the cam cap and cam. Sounds like there is another problem to me.

 

Likely not an oil problem. With the cam belt change I assume that the mechanic rechecked the valve shim clearances and adjusted accordingly. Does the mechanical clatter sound like loose valve clearances? I have not worked on a 4-valve, but assume that they use the same shims as earlier 308s, 208s, etc.

Jim S.

 

I would be a little concerned that either a tensioner bearing or cam drive bearing might be going bad. Were new tensioner bearings put on? I forget who it was, but someone had a new bearing that was bad right out of the box.

Get a mechanic's stethoscope and try to diagnose exactly where the sound is coming from as quickly as possible. If it is a tensioner bearing, failure could be very costly.

 

Just a quick suggestion here. Ferrari's are noteable for having un-reliable gauges. I would do an oil pressure test on the engine to see if you really have 85 Psi oil pressure? I dont know what the correct oil pressure specs are sorry. But thats what i would do 1st for peace of mind,that the oil pump is ok,as you said it is a little dry in the top end yourself. Do that,then go from there

 

What longer bolt are you talking about?

Absolutely, if you removed the cam covers and then resealed them. A glob of sealant could have clogged an oil passage.



Can we get a little history of the car, and the proceedure you followed for belt replacement?

1. When were the tensioner bearings replaced? Last full service?
2. Did you remove the cam covers during the belt change?

If you just locked down the cams (how?) and simply replaced the belts, then the cam timing may be way off because of a slipped tooth or two on the cam gears. The only way to know for sure is to remove the cam covers and inspect the timing marks. There are rough timing marks (on QV's) on the back of the belt covers. Se picture. The pointer for the mark is riveted to the back fiberglass timing belt cover. The photo shows the marks painted for clarity.
These can't be used to actually time the cams, but are there for rough verification- as far as I know.

You can run the car with the oil cap removed and see how the oil is flowing.

Good luck, and please fill us in on how it's going.

Lastly, would you mind filling out some of your profile? At least we can know where you are located and we might be able to help even more.

jwise
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Just a long shot... could it be an incorrectly adjusted alternator belt? or AC belt? if you are hearing the valves... I would think you would have smoke etc... but high pitched chatter can be made by the acc belts being loose, mis aligned etc...

If its the valves put some upper end lube... in then start it... quieter .then you have a valve issue... by the way 2valve & 4 Valve shims are NOT interchangable... I know from personal experience...

 

Thanks for the extra info and updating your profile. There are tons of owners in and around Houston. Maybe post in the Texas sections for some hands-on help.

O.K.- I'm a little confused. Did you follow the process on the link provided (remove cam covers) or did you just lock the cams at the gears, slip off the old belts, and slip on new belts (I know, it's a little more complicated than that!)?

I would do a simple compression test, and then let those resuts decide if you need a leak-down test.

Basic things to do:
check oil level
try to locate the noise with a stethescope (NAPA has them)

good luck

 

Skipping 2 teeth bent my exhaust valve guides (valves OK) on my 348. Skipping 1 tooth did not bend my intake valve guides.

 

How about an update on the situation.

 

After you replaced the belts did you turn it over by hand several revolutions?...if your cam timing was out such that your valves are contacting your pistons it seems to me you would have "felt" this when turning it over by hand. Experts...am I wrong here?

 

I think he's in search of a guy here in Houston......

 

guessing here but was it the same oil filter or was it replaced.It possibly jumped a couple of teeth when the camshaft journals ran dry of oil if/ it ran out of oil or possibly the belt tension was incorrect .sorry to hear it.Jumping teeth sends a shiver down my spine

 

Good to hear you figured it out. I know, those cam drive bearings can be a pain. Please post some pictures of your process- thanks.

You did both, correct? The oil seals also?