Jake On?

Sounds like improper adjustment. Most engines have a separate housing that bolts down over the rockers for the Jake Brake. The Jake housing will have adjustable pistons that push down on the exhaust valves. If they are too tight you will hear funny noises. If it seems wrong to you, don't hesitate to bring it back. If something is wrong the longer you wait the worse it will get.

 

If the racks on a 2 cycle Detroit are not adjusted properly they will do that.
You have to tell us what kind of engine, and model, you have!
But mainly if it does not sound right take it back. If the adjuster is not locked properly it can do the same thing.

 

sounds like the "TECH" adjusted the jake too TIGHT. get it back FAST!

 

I posted this question under the tread that's already here....I have seen and heard guys leave their Jake on even when shifting to get that nice growl...My question is does this damage the motor or jake at all? It can't be for any other reason, than that sound between shifts.

 

I leave it on so I dont have to use my brakes all the time, money saver......and it sounds good too

 

I read that engine manufacturers do not recommend this as it can cause engine damage, they call it "jake shifting." Unless you double clutch, I don't see how you can stop it from coming on. I find it annoying, as it cuts the throttle for a split second when you tryi to go through the gears, especially if you're speed shifting the lower gears.

 

Never had any issues???

 

On some of the older cat engines you could have a smoke & a coffee between shifts because they were so slow in dropping rpm's. So I would leave the jake on to shift sooner.