In a 340, where does this go???

[jmartin99]

I am putting together a 340 for a friend for his '72 Challenger. He brought it to me in pieces ready to go together.  I found this bolt in the bag of bolts and I have no idea where it goes. 





It is a 5/16 bolt about 3/4" long. The hole goes all the way through it.

Thanks!

Jeff 

[vinb]

Small block upper cam thrust plate, put it in the upper left hole.
That lets oil to get to the timing chain..

[jmartin99]

Okay,  I have three other bolts the same size that I have in the thrust plate right now along with an oil shield that the bottom left bolt goes through and a tang from the shield sticks into the bottom right hole in the thrust plate.  This is how the service manual showed that it should go.  Do I leave the shield in place and replace the top left bolt?

Thanks!

Jeff

[vinb]

I would leave the bolt in and use the deflector shield...

Some guy's leave the bolt out , your choice...

[moper]

Yup... was said... upper cam retainer plate bolt.

[72hemi]

Ok, once I saw this thread I got a little freaked out and still am. I am in the middle of a 1970 340 that had never been apart before I got my hands on it and there is no hole in any of the four bolts for the cam thrust plate, so what gives? 

[71chally416]

Somebody screwed up on the assembly line.   

[Ck[FIN]]

It works without the special bolt also. Maybe not 300000miles but it works. Remember to use the shield, it really helps.

[72hemi]

So should I drill one of the bolts (I have a bridgeport mill so making sure the hole is centered is not a big deal)? If so what diamter is the hole? Should I leave the bolt out? What does this shield look like and where can I get one?

[the_engineers]

I drilled one on my mini-lathe...I think I went 3/32"

[moper]

Just leave the pass side upper bolt out. Mopar did this on later assemblies.