Engine issues

[open headers]

Ok so I just replaced my 340 to a 360 magnum. At 2200 rpm’s there is metal rattle noise. Like a heat shield. Sounds like it’s at fire wall. Every thing is tight. Can’t find it. Driving me nuts. Any thoughts

 

[Chryco Psycho]

Inspection sheild to access the Tq converter bolts ?

 

[open headers]

All tight double checked

 

[Xcudame]

Did you use either a 360 flex plate or 360 balanced torque converter? That's about the rpm an out of balance condition will really start to rattle.

 

[Chryco Psycho]

Are the Tq converter bolts too long & contacting the plate ?
Possible exhaust leak ?

 

[open headers]

Nope. I think it’s the inspection plate on bell housing. Taking it off tomorrow

 

[Chryco Psycho]

Right sound & location so I agree , you may have to bend the plate a little for extra clearance but I have often seen this especially when using a 10 " converter instead of 11" as the bolts sit further in on the radius .

 

[Ricks72Chlgr440]

Right sound & location so I agree , you may have to bend the plate a little for extra clearance but I have often seen this especially when using a 10 " converter instead of 11" as the bolts sit further in on the radius .

Exactly! Had the same issue. Found the TC bolt heads were scraping the inside of the inspection cover.

 

[open headers]

Ok found it. So at higher rpm the flex plate rubbed the starter. Ughhh. Ground starter down a little. All set. Thanks guys.

 

[open headers]

So now I’m breaking in new 360magnum. She’s running at 183 temp. And it’s 70 here. What’s average temperature it’ll run at.

 

[moparleo]

Depends on the engine build, tune, cooling system type. Many variables that you didn't tell us, only that it is a 5.9 Magnum.
A normal , accurate gauge reading would be around 190-200°.

 

[open headers]

It’s a crate motor. 4 vein aluminum radiator. Clutch fan. Water pump is fo AC car. Dekota gauges.