Ok as you can see in my sig. I have built a fairly strong 305 and have been having trouble getting it tuned in.......Well today I noticed the timing chain cover moving in and out and the motor ran.........is this correct or did the maching shop forget something when they built the short block....and could this cause my knock count!!!!


Thanks again for the help
Brian Felts

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1989 Camaro RS

305 .030 over Hydro Pistons
Vortech heads milled to 58cc...Performer RPM intake....LT4 cam..Crane Gold rockers...FastChip custom chip...ALum. Driveshaft...3.73 gears with Posi...underdrive pullys...Rebuilt 700R4 with Vette Servo and B&M shift Kit...MSD ignition...A/C Delete No SMOG junk....1997 SS leather interior...B&M Shifter... Ultimate TBI mods...14X3 K&N open Element Non-Drop...Hooker headers....3" exhaust with Flowmaster Cross flow 16X8 Wheels from 97 RS Spohn LCA's Spohn Panhard Bar..LETS PLAY FORD!!

www.geocities.com/feltsb

 

Sounds like they forgot to tighten/install the cam retainer plate.....

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
and 2 POS commuters...

R.I.P. #3
"He can see air"

 

Theres supposed to be a plate that bolts to the block infront of the cam behind the timing chain. This might have been taken off if you went to a non roller cam. This could also indicate the timing chain is very loose also. Some flex is said to be normal but if its threatining to punch a hole in your cover I would say something is amiss.
SSC

 

Well its a roller LT-4 cam and it was an original roller LO-3 block......The timing tab you can see wobble across the top of the balancer........It seems a little noisy in the front also........This is my first true rebuild and the machine shop did the assembly on the short block.


Thanks again
Brian

------------------
1989 Camaro RS

305 .030 over Hydro Pistons
Vortech heads milled to 58cc...Performer RPM intake....LT4 cam..Crane Gold rockers...FastChip custom chip...ALum. Driveshaft...3.73 gears with Posi...underdrive pullys...Rebuilt 700R4 with Vette Servo and B&M shift Kit...MSD ignition...A/C Delete No SMOG junk....1997 SS leather interior...B&M Shifter... Ultimate TBI mods...14X3 K&N open Element Non-Drop...Hooker headers....3" exhaust with Flowmaster Cross flow 16X8 Wheels from 97 RS Spohn LCA's Spohn Panhard Bar..LETS PLAY FORD!!

www.geocities.com/feltsb

 

The LT4 cam has a longer pin for the timing chain and opticrap on the LT1 apps... it sounds like the pin wasnt tapped in like it should have been and its rubbing your cover. Thats my guess anyway. I'd definitely look into the problem before something really bad happens.

 

You need to pull the cover off and find out what's happening. Somebody didn't install something correctly...

 

Yeah they sure didn't........I think madmax is correct I don't think they thought of the pin but it is probably my fault also since they did the chain......I did the cover and didn't double check the cam!!!!!!


THanks all
Brian

------------------
1989 Camaro RS

305 .030 over Hydro Pistons
Vortech heads milled to 58cc...Performer RPM intake....LT4 cam..Crane Gold rockers...FastChip custom chip...ALum. Driveshaft...3.73 gears with Posi...underdrive pullys...Rebuilt 700R4 with Vette Servo and B&M shift Kit...MSD ignition...A/C Delete No SMOG junk....1997 SS leather interior...B&M Shifter... Ultimate TBI mods...14X3 K&N open Element Non-Drop...Hooker headers....3" exhaust with Flowmaster Cross flow 16X8 Wheels from 97 RS Spohn LCA's Spohn Panhard Bar..LETS PLAY FORD!!

www.geocities.com/feltsb

 

btt

Any other suggestions?

------------------
1989 Camaro RS

305 .030 over Hydro Pistons
Vortech heads milled to 58cc...Performer RPM intake....LT4 cam..Crane Gold rockers...FastChip custom chip...ALum. Driveshaft...3.73 gears with Posi...underdrive pullys...Rebuilt 700R4 with Vette Servo and B&M shift Kit...MSD ignition...A/C Delete No SMOG junk....1997 SS leather interior...B&M Shifter... Ultimate TBI mods...14X3 K&N open Element Non-Drop...Hooker headers....3" exhaust with Flowmaster Cross flow 16X8 Wheels from 97 RS Spohn LCA's Spohn Panhard Bar..LETS PLAY FORD!!

www.geocities.com/feltsb

[This message has been edited by Brian Felts (edited July 15, 2001).]