Chevrolet Dealer Technical Service Bulletins for 1969

[rich69rs]

Tech Service Bulletin on Low Fuel Economy, 1968 327 2 Bbl engines with auto trans.  Page 1 of 3.

[rich69rs]

Tech Service Bulletin on Low Fuel Economy, 1968 327 2 Bbl engines with auto trans.  Page 2 of 3.

[rich69rs]

Tech Service Bulletin on Low Fuel Economy, 1968 327 2 Bbl engines with auto trans.  Page 3 of 3.

[rich69rs]

Tech Service Bulletin discussing a "ticking" sound sometimes heard in cars (including Camaros) with dual fuel line, i.e. supply and return.

[rich69rs]

Tech Service Bulletin for 1969 350/300 Hp Engines, auto trans - Hard Starting

[rich69rs]

1969 Tech Service Bulletin - Speedometer Error - Reading Low

[9T4Z]

Great find..... thanks for sharing

[rich69rs]

Tech Service Bulletin for 1969 Potential Overheating in 396 and 427 Engines - Page 1 of 2.

In previous threads and discussions, others (in particular JohnZ) have pointed out the benefit of using intake manifold vacuum instead of ported carburetor vacuum as the source for the distributor vacuum advance.  One issue with lack of proper vacuum advance, is the potential for the engine to run hot at idle or in city traffic.  Refer to the following for JohnZ's disccussion:  http://www.camaros.org/forum/index.php?topic=64.0

In this Tech Service Bulletin, you will note that the bulletin states that:  "Full vacuum advance at idle must be provided".  On the second page, the drawing shows one of many possible ways to do this.  The service bulletin is telling us the same thing that JohnZ has pointed out.  Full manifold vacuum as the source for the distributor vacuum advance is a desirable thing.

[rich69rs]

Tech Service Bulletin for 1969 Potential Overheating in 396 and 427 Engines - Page 2 of 2.

[camaronut]

Rich,

Thanks for posting these bulletins!!!  I have the "Ticking Fuel Line" syndrome, and couldn't figure for years what to do.....

After oh......15 years.....I finally have an answer!!!!

This is what this board is all about!!!

[GaryL]

Thanks Rich. Great reading for us Camaro nuts.

[Old Man]

Wow that's a very cool find Richard, thank you very much for the information. I read the hot starter SB with quite some interest as my 69 350 does this. Mine is a late 69 production so I would assume that it was built with the 1108420 starter as the SB is dated late 68. Makes me wonder if there wasn't another SB to come out at a later date replacing this one.