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I've concentrated on getting this thing running correctly and have been cleaning up the engine bay one bit at a time. The ignition shielding came in a box of parts and I've left it to one side because it would have been in the way. It shined up nicely and I want to post a few pics after I have things presentable; wiring, hoses, wiper door alignment. A ways to go yet and a good small winter project.
Some of the brackets are curved on my 70 they were installed wrong at the dealer , no shielding was on at the time , but when I put it all back together I DE-BUBBA'D it back to normal . Sorry don't have any recent pics .
Hi,
On occasion problems with fitting the radio shielding properly, be it either the full box with lid, 68-70, (or the 71+ one piece) has to do with the right side bracket being put on the wrong intake manifold bolt.
This happens because if the distributor is 'clocked' incorrectly the advance can and the vacuum line running to it hit the bracket... so the bracket is moved.
Note the can is to the REAR of the radio shielding bracket.
This has to do with keeping the tach drive on the left side of the distributor in the proper position to receive the tach cable with out introducing a 'kink' in the cable.
Regards,
Alan
Note the tach cable feeds straight into the tach drive fitting.
Note also the position of left side bracket on the manifold
Hi,
On occasion problems with fitting the radio shielding properly, be it either the full box with lid, 68-70, (or the 71+ one piece) has to do with the right side bracket being put on the wrong intake manifold bolt.
This happens because if the distributor is 'clocked' incorrectly the advance can and the vacuum line running to it hit the bracket... so the bracket is moved.
Note the can is to the REAR of the radio shielding bracket.
This has to do with keeping the tach drive on the left side of the distributor in the proper position to receive the tach cable with out introducing a 'kink' in the cable.
Regards,
Alan
Note the tach cable feeds straight into the tach drive fitting.
Note also the position of left side bracket on the manifold
Well this certainly saved me some trouble. Earlier this year I followed the service guide's procedure to 'reset disturbed distributor' - brought #1 to TDC and had the timing mark at 0. When I installed the plug wires the car wouldn't run and backfired through the carb. Lather, rinse, repeat - same thing. Ultimately I connected the #1 plug wire to #6 position of the distributor and followed the sequence from there and viola - the thing fires and runs just fine now. The tach drive cable isn't kinked but is at a slight angle and the vacuum can is definitely forward of the passenger side bracket.
This is one of those problems that I keep tripping over and will continue to do so until I get to the root of it - which right now I can't get my head around.
I realized this sort of talk can ignite a thread and really didn't intend to do that. I commented on it once in the tech forum and had cause to regret it. So yes, I followed the GM guide and absolutely had it at TDC. To be clearer I went clickety-click very carefully until the rotor was pointing at where #6 is, set the cap, put the wires on as described and the thing fired right up. It starts & runs fine like that.
The cause is down deeper than I want to dig and must have occurred when the PO had the engine out for rebuild. Apart from the wiring a side effect may be the positioning of the vacuum can and tach drive cable. If the net result is that I can't put on the chrome breadbox that's OK.
I took the brackets off and painted them so when they are dry I'll see if I can finagle the box on. If not then I'll know why it wasn't on the car in the first place.
Hi p,
The issues of the tach drive angle and advance can clearing the shield support were critical enough that they made the Service News as the 68 cars were being produced.
It affected both 327 and 350 cubic inch engines.
Note the change affected only Corvette engines.
Regards,
Alan
Had a similar problem on my 69 as Alan mentioned with my distributor vac hitting my bracket. I just could not get the correct timing. Once I relocated the distributor behind the bracket I could dial it in.
RVZIO
Mine was exactly like that when I got the car and noticed on one of Allen's pics that the vaccum adv. was in a different position , the D--- A dealer installed the bracket wrong also the distributor , still don't know what they did with the shielding . But it's all done now and looks good.
Hi p,
The issues of the tach drive angle and advance can clearing the shield support were critical enough that they made the Service News as the 68 cars were being produced.
It affected both 327 and 350 cubic inch engines.
Note the change affected only Corvette engines.
Regards,
Alan
Alan - thanks again I think you may have nailed it. I did get the doghouse installed and found that the PO had bent the bracket to clear the vacuum can which is installed as shown in the figure on the left. The fit is poor and that's why it was in the box in the first place.
This service bulletin has given me an idea regarding the distributor issue and a peculiarity with the timing I noticed that I want to try. Again, the thing starts & runs nicely so I intend to tread lightly. Will probably have to wait for nice weather - too much salt on the road right now to even take it around the block for a test ride.
An interesting discovery was a metal band around the base of the distributor. It spins a bit. Once I wiped off the gunk it says 111493 Delco which seems to be the right one for the 350/350.
Hi P,
Distributors typically had a band around their base that was stamped with Delco Remy, a part #, and a date code.
The date code is typically a digit for the year, a letter for the month, and 1 or 2 digits for the day. (0 M 16) for instance. M being December.
Nice Find!!!!
Regards,
Alan
ignition shield
Mine was exactly like that when I got the car and noticed on one of Allen's pics that the vaccum adv. was in a different position , the D--- A dealer installed the bracket wrong also the distributor , still don't know what they did with the shielding . But it's all done now and looks good. 