Prius cold start today loud knocking and car shook

first, it's not that new. it's 5 years old. how many miles on her?

second, when was the oil last changed, (months/miles)? we need to figure out how much your burning.

my car made a funny sound and the oil was at the end of the dipstick doesn't really tell us anything.

no need to panic.

 

88k is a little early for oil burning, but not unheard of. 8k is 80% of your oil change interval.

the key now, is to fill it to the full line and start tracking it. toyota has a spec for how many miles it can go on a quart before they will do anything.

someone here will know how many quarts are measured on the dipstick. you're right, there's still oil below it.

 

Toyota considers oil burning at a rate of 600 miles per quart to be normal. Most people would not think this is normal at all!

You are out of warranty and unless you're prepared to spend thousands on a new engine, you would just have to check your oil level more often. Add oil as needed.

My 2010 is at 82k miles and it burns oil at around 1qt every 3000 miles. If I didn't check it often and went 10,000 miles on it, I would be down more than 3 quarts, which will cause serious engine damage. So checking your oil level often is key

 

8yr/100k warranty is for your hybrid battery warranty, your engine warranty was over long ago. And you have to burn more than a quart every 600 miles to qualify for a warranty

 

oh ya, that's it. sounds like cold soak shake, rattle and roll.

 

Found this after searching "engine rattle"...

 

it's usually due to starting the car, and shutting it down before it is fully warmed up, which leaves unburnt hydrocarbons in the manifold. they get sucked in on the next startup and cause detonation.

 

So what does that service bulletin do? Replace the intake manifold with a revised one??

 

That's what the TSB says, "Remove and replace the intake manifold with the updated part" The TSB gives affected VIN #s and manifold part numbers if you're inclined to check yours.

 

Thanks. Never had the engine start-up knock, (shameless pun) knock-on-wood. We're in a mildish coastal climate, and virtually always using block heater for first start of the day. Around 57,000 km's.

 

We had this issue and the car shook like a Richter scale 6 earthquake! Bought it in to my dealer - showed him the TSB (see post #11 above), he didn't blink an eye, and gladly replaced it (since toyota was paying...). Took my word on the fact that it happened twice - since I told him he will unlikely replicate the issue in the garage. Took a day to get the part and a day to install (maybe 90 min?).

 

excellent. let us know how it works out!

 

Haven't had the problem since after the replacement. But then again, it didn't happen for the 2 years that we had the car...until it happened.

 

Correct, happened to mine, started car to move it night before and only running less than a minute, next morning same noise as above for a few seconds. Thought it might have been a plug or two still wet (flooded) and stopped after 20 seconds. Never had it since.