Timing chain Rattle when hot?

[eastmedia]

When I take my 1600 out for a long drive (50 freeway miles or more) and it heats up, 180*, never overheating, the timing chain rattles as I come off the freeway and the engine returns to idle. If I rev it up again the rattle dissappears. If I park it and let it cool a bit the rattle is gone.

I can drive it around town all day, short trips and such and there is no rattle. Only after running it at high revs for an extended period.

Any ideas?

Ron

[SLOroadster]

Try 20/50 oil. It won't hurt anything. Thats the quick fix. How many miles does the engine have on it, it might be time for a timing chain replacement.

Just a thought,
Will

[Ldino21]

It could be that as the engine is getting warmer the viscosity of the oil gets less, you may be losing a little oil pressure, if you havent changed the oil for a while maybe its time to change it!! Otherwise you might need to either shim the tensioner or get a new chain.

Lou Smaldino
66-1600
67-2000'
65-1500

[eastmedia]

Actually I just changed the oil and filter last week and today was my first freeway trip and it happened. I put in 10w-40 synthetic. Is that too thin an oil? The engine has a lot of miles, but the head has been redone recently and it runs really strong.

Does the 1600 have a timing chain tensioner that can be adjusted?

Ron

[S Allen]

Ron,

There is a tensioner towards the bottom but you cannot adjust it. If you are hearing a rattling tming chain on a 1600 I would be for changing it sooner than later. You can buy all new parts from MotoPower for around $60.00. Chain, tensioner and sprockets. $200.00 plus from else where. Not that hard to do and well worth the effort.

Steve