Chain Rattle at Start-Up

[Seal1968]

Upgrade your OPRV - it helps retain oil pressure at start up.

Replace your tensioners.

What oil is in there? Switch to 10/40 or 15/50.

See what happens.

[jaykay]

I routinely crank the engine on the starter with the fuel pump fuses pulled after a long sleep. No affect on the starter as yet. I can't see oil pressure build as I have no dash mounted analog gauge. I would think the oil would circulate on the starter and some pressure developed.

I don't believe I have ever managed to stave of chain rattle on the starter

[jaykay]

Originally Posted by Seal1968

Upgrade your OPRV - it helps retain oil pressure at start up.

Replace your tensioners.

What oil is in there? Switch to 10/40 or 15/50.

See what happens.

Yes! PRV! This has been on the list for a while....it's a 997 part number I believe.

[flmont]

Whats OPRV mean,.. I changed 1 out of the 3 tensioners I did the IMS one, the other bottom one was still strong and I didnt get the top one yet..plus I went to 20-50.And I still have the rattle,andits getting to be on every start up now ??

[flmont]

Uhh..oil pressure relief valve.??

[dghii]

Originally Posted by Seal1968

Upgrade your OPRV - it helps retain oil pressure at start up.

Replace your tensioners.

What oil is in there? Switch to 10/40 or 15/50.

See what happens.

I bought a 03 996 with 67K well cared for miles. Car had been driven only about 5K miles in the previous 5 years prior to purchase. I would get some chatter at cold start and was concerned about how I would solve it. I did 2 things....

A few hundred miles prior to an oil change, I added Marvel Mystery oil to the the car....maybe a pint or so, and drove the car for a few hours.

Also did the OPRV while I was changing the oil.

I haven't heard the rattle since. Been about a year.