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105617 Posts in 12334 Topics by 4753 Members
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31  Camaro Research Group Discussion / General Discussion / Re: My New '68 Camaro Z/28 Butternut Yellow on: August 10, 2014, 09:18:21 PM
Thanks for posting that Jerry.

Yes that smog pulley is interesting.  So we know of at least two cars now that had it.  Hmmmm....

BTW, Jerry have you ever seen any late 68 Z28 engines that used the 186 heads rather than the 291s?
32  Camaro Research Group Discussion / Maintenance / Re: technical articles by JohnZ on: August 10, 2014, 10:03:51 AM
Right.  Those are ALL great articles.  At this link.
http://www.camaros.org/articles.shtml

This one is a MUST read.
http://www.camaros.org/pdf/timing101.pdf
33  Camaro Research Group Discussion / Research Topics & Reports / Re: Earliest 3969341 and Latest 3894860 axles on: August 09, 2014, 09:51:18 PM
Looks like 0128 is the date.  You had 0218, so I modified your post so it matches the picture.

Thanks!
34  Camaro Research Group Discussion / General Discussion / Re: My New '68 Camaro Z/28 Butternut Yellow on: August 08, 2014, 10:56:14 AM
One thing that you may want to double check is that all of the intake bolts are tight.  Do not over tighten them or break them off - but make sure they are good and snug.  Can't tell you how many times that has been an issue on engines I have worked on.
35  Camaro Research Group Discussion / General Discussion / Re: My New '68 Camaro Z/28 Butternut Yellow on: August 07, 2014, 05:52:46 PM
I don't know if the valves being off would cause that issue or not.  I am not saying it would or it wouldn't.  But I think they would have to be off quite a bit to cause that problem.

How did you check for vacuum leaks? 

The old school way to check for vacuum leaks it to use an unlit propane torch or carb cleaner.  But this can be dangerous.  I am not telling you to do this.  But if you want to know, here is how it is done.  Again, if you do this, be CAREFUL.
http://www.popularmechanics.com/cars/how-to/maintenance/how-to-find-a-vacuum-leak-2

I prefer the torch method, outside of course.

If all the vacuum hoses are original, it might be a good idea to just go ahead replace them.  Of course keep the originals.

36  Camaro Research Group Discussion / General Discussion / Re: 68' z28 Camaro emblem on trunk lid on: August 07, 2014, 04:53:14 PM
Based on what I can see, it seems fine.  But I do not have that exact date for a comparison with another.

I am interested in what others think.
37  Camaro Research Group Discussion / General Discussion / Re: any of you ever sued over a car you bought on: August 05, 2014, 06:50:56 PM
Any updates on status of where you are with the dealer you bought the car from?
38  Camaro Research Group Discussion / Originality / Re: late 68 model year Z28 heads on: August 05, 2014, 06:49:50 PM
Thanks for the information Steve.
39  Camaro Research Group Discussion / General Discussion / Re: 68'z28 colour combination on: August 05, 2014, 06:48:42 PM
Good color combo.  Post pics of the drivetrain stamps when you have time.
40  Camaro Research Group Discussion / General Discussion / Re: My New '68 Camaro Z/28 Butternut Yellow on: August 04, 2014, 09:26:31 PM
Going by memory but I think the 6.5 power valve is correct for that carb.  Not sure why he would want to make the changes he told you.

It is not easy to diagnose a problem like this remotely, but I suspect a vacuum leak somewhere.  Possibly where the intake seals onto the heads or block. 

Did you check for a vacuum leak?
41  Camaro Research Group Discussion / Originality / Re: late 68 model year Z28 heads on: August 03, 2014, 04:09:48 PM
Darrel, the engine was not complete and was out of the car.  But yes they did have the bolt holes.  Carb, intake, air cleaner, valve covers, rods, pistons and M21 were correct for this car

Personally I have not seen the 186 heads actually used late in the 68 model year, just wondering if anyone else has.
42  Camaro Research Group Discussion / General Discussion / Re: My New '68 Camaro Z/28 Butternut Yellow on: August 03, 2014, 04:05:23 PM
Gary is right.  A good original 3310 or 3310-1 will work fine and is 780 cfm (2 metering blocks).  I believe the later versiions (3310-2, 3310-3 etc) are rated at 750 cfm but they will work fine too.

For your needs you just need something 750 cfm or so that is a vacuum secondary carb.  

BUT, I would just try to get what you currently have working.  What did he do when he rebuilt your carb?  Standard rebuild?  Did it run OK on another engine?
43  Camaro Research Group Discussion / General Discussion / Re: My New '68 Camaro Z/28 Butternut Yellow on: August 03, 2014, 12:46:00 PM
I am sure your friend knows what he is doing with carbs.

For the symptoms you liist, it sure seems like it is either the carb or something sticking in the distributor.

Personally, I think you can find a nice carb for less than that.
44  Camaro Research Group Discussion / General Discussion / Re: 67 VIN on: August 03, 2014, 10:30:03 AM
I am not sure if there is anyone that can answer the question FOR SURE.

It probably was. 
45  Camaro Research Group Discussion / Originality / late 68 model year Z28 heads on: August 03, 2014, 10:07:33 AM
OK, I know that most (possibly all?) 1968 Z28s used the 3917291 heads with 2.02 intake valves.

I looked at a very late (I think 3rd week of July) 1968 Z28 that did not have the original block but did have some of the original engine parts.

Owner THOUGHT the heads might be original.  But they were casting number 3927186 and dated June of 68.

Is there anyone that can confirm the 186 heads were used on any late model year cars? 

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