weird crank sound on start up
 

Ok I just noticed this yesterday but when it's really cold out it sounds like the engine is mocking but when I put it in gear it goes away. Now I smell a little oil and when I crank it over it has a little had clunk kind of what it sounds like when a motor is gonna die on its own.

I don't know but there shouldn't be anything wrong. Its a new crate 350 with 40k miles on it

Re: weird crank sound on start up
 

Do you mean "knocking"? Also unclear on "had clunk"?

Would also be helpful if you added a "signature" so we know the details of the vehicle you are asking about - year, trans type, engine modifications, if any, etc.

What viscosity oil are you using? What temperature are you calling "really cold"?

Re: weird crank sound on start up
 

yes and sorry phone and the auto correct.

and cold i mean 30 degree or lower, and the start up i had fought with my wife for hours to let me take it to a mechanic and so she agreed to go out to the car and listen and sure enough it didnt do it so i got the "seriously" look

maybe its my inner gear head talkting to me to get so i can say its broken to get a performance version LMAO

Re: weird crank sound on start up
 

Oil viscosity plays a large part in preventing cold start knock. Again, what oil are you using, and what oil did the crate engine builder recommend?

Re: weird crank sound on start up
 

Not sure I have been having a hard time getting a hold of him due to him being buisy in his garage cause I have few other questions for him as well about the coolant and the cooling fan switch he has running to the fuse box

Re: weird crank sound on start up
 

You've been driving the car for 40K miles, but you aren't sure what oil is in it? Or did you just install a used (not "new") crate engine with 40K miles, and have not yet changed the oil?

Re: weird crank sound on start up
 

No not 40k I only drove it couple 100 miles I just barely got it

Re: weird crank sound on start up
 

Well to be safe I'm going to put Pennzoil 10w-30 tomorrow

Re: weird crank sound on start up
 

You might want to consider 5W-30. The "5W" indicates that it flows better at low temperatures than "10W". Gives you the best cold start protection.

The factory recommendation for the LT1 is 5W-30. The Owner's Manual does indicate that 10W-30 is acceptable if the ambient temperature will not go below 0*F. The "30" tells you that both oils have the same viscosity at normal hot engine operating temperature.

Re: weird crank sound on start up
 

Ok thanks didn't know cause I always put 10w in my other camaro I used to have

Re: weird crank sound on start up
 

Well I opted out for 5w-30 pennzoil synthetic blend. And man was a good thing I did cause it was nasty and when it was draining it kinda looked clumpy when it was draining. Hope no internal damage was done :(

Re: weird crank sound on start up
 

Hopefully someone didn't load it up with heavy oil to cover up a problem.

Re: weird crank sound on start up
 

thats what im hoping for that it's not a band-aid but i have been riding around and so far so good. But you never know