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Author Topic: My New '68 Camaro Z/28 Butternut Yellow  (Read 17466 times)
dannystarr
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« Reply #270 on: August 10, 2014, 01:30:51 AM »

more
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dannystarr
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« Reply #271 on: August 10, 2014, 01:34:40 AM »

Right head front stamp
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dannystarr
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« Reply #272 on: August 10, 2014, 01:35:14 AM »

left head front stamp, maybe a "C", or an incomplete zero? ... Danny
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69Z28-RS
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« Reply #273 on: August 10, 2014, 12:18:09 PM »

Danny, what part of the head are you finding those stamps? (the '0' and the '6')??   Can you take another photo or two with a wider field to show where they are?
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Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
1968 Z28
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« Reply #274 on: August 10, 2014, 08:13:20 PM »

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Interesting pulley!   Everyone says that the Z28 should have a deep groove pulley (#3925522) on the smog pump and most of them do.  My 06-19 engine did not have the deep groove pulley....it had the standard groove pulley (#3927116) just like your showing on your engine.  I have never been able to find out exactly why that happened.  Kurt, the site coordinator,  said that he has seen this happen before but he didn't know why either.  So, to be correct, I finally found an original #3925522 pulley and purchased it.  If you are interested, there is one currently listed on eBay for a fairly decent price.   Here is the link.....http://www.ebay.com/itm/VINTAGE-1968-72-BIG-BLOCK-CHEVY-bbc-CORVETTE-427-454-SMOG-PUMP-PULLEY-3925522-/271538620175?pt=Vintage_Car_Truck_Parts_Accessories&hash=item3f38f6870f&vxp=mtr

BTW....my original heads also have that single digit number on the ends.  Own mine, it is stamped so light that it is hard to make out....so I can't tell exactly what it is.
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Jerry G.

Z28-1968-07C-Norwood
Ermine White, Red Std. Interior
2nd. Owner, 38,000 miles
bcmiller
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« Reply #275 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?
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1968 Camaro SS - now 468 BBC, M21, 12 bolt.
Bryon
dannystarr
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« Reply #276 on: August 11, 2014, 01:20:19 AM »

Ok, let me try to answer some questions

 I sprayed carb cleaner around the base of the intake. I really couldn't tell if there was a rise in the idle. I remember doing that years ago and having the idle increase. Didn't happen, if it did it was so subtle. Will try water...

 I already had tightened the intake bolts a few days ago. The middle 4 were some what loose. And turned 3/4 of a turn easily. Rest were tight and didn't budge.

 I have that miti-vac hand pump. I used it to help bleed the brakes. I will try the distributor advance. But I think patience is more in order and I am going to send it to JM. I just found out that the 532 point plate is NOT in the dist. I thought I was told it was, my fault. So def. need to have it put back stock. Anybody have an extra point plate before I send it away??

 Motor never apart as far as I can tell. Should still have the 30/30 Duntov. So no crazy grind.

 I have not pulled the plugs in a while. I am going to install another set in the coming days.

 Compression was a LITTLE all over the map from 155 to 180. Only ONE cylinder had 180, rest were 172 etc. etc.

 Will do the clean rag over carb trick again. Last time I did it when all this first started, as I mentioned in a previous post, it died with-in a half to one second! Just RIGHT NOW died. Witch led me to believe there was no Vac leak.

 Didn't know about the smog pump pulley thing. I sure can't spend $400 on a pulley. I would bet my left testy that this is the one that was on the car when it left the factory. 56 thousand original miles, who would pull it and change it, and why?

Gary - Here is the pictures showing location of front head stamps. I shot the pic's starting from a ways back and then closer.

 Also the left shock tower cap still in place. Checked the tapper etc. against Chick's close-up posted picture of his original and an aftermarket. Look like mine is original.

Right side front - head stamp
    Danny
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dannystarr
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« Reply #277 on: August 11, 2014, 01:21:06 AM »

Left Side front head stamp
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dannystarr
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« Reply #278 on: August 11, 2014, 01:22:41 AM »

Left side shock tower cap in trunk..
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Jon Mello
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« Reply #279 on: August 11, 2014, 10:46:20 PM »

not related to the carb problem but another thing to check on unrestored cars........

the distributor mechanical advance has a rubber bump stop that can dry out and crumble off leaving
a smaller diameter steel pin. This can change your timing and advance by a large amount

many people installed aftermarket advance kits that came with weights, springs, and a bronze bushing, so if your car has that it should
be OK but if it still has the rubber bushing you may want to check it.

I just happened to buy a February '68 issue of Super Street Cars magazine at the swap meet over the weekend and it had an article in it called " How to rework your distributor for max performance ". It has some good tips and it also has a good pic of the rubber piece that Joe was talking about.







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Jon Mello
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dannystarr
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« Reply #280 on: August 17, 2014, 02:29:01 AM »

Hey Jon, thanx very much for that info. It's a lot to take in, especially for a backyard mechanic such as myself. Seen that rubber piece you were talking about, pretty cool. I never knew it was there until I heard it mentioned in one of the replies.

Going to adjust the Valves Sunday. Then pull the Distributor and send off for rebuild. Wish I could also send the Alternator, Master Cylinder, Calipers and a few other goodies.... But that takes $$$  Sad   Then will change the oil and the spark plugs again. When Dist. comes back I can drop it back in and start my trouble shooting issue back up.

 In the mean time, found this tag on the car. It was stuck on and seems original. Can you guess where on the car it was located???... Danny
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janobyte
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« Reply #281 on: August 17, 2014, 08:06:37 AM »

You probably already know ,just a reminder. When you pull your distributor make sure #1 cylinder on TDC: I/E rockers should be "loose" as both valves are closed, pull your dist cap, rotor should be pointing to, or real close to #1 cylinder. Dis connect your battery Cheesy This way everything will already be set for you when you are ready to reinstall.


If you do roll the engine over, or already pulled it...the above is what you want to check  before installation.

"putting it in the way it came out" works....if no crank rotation and you know rotor alignment. I've always taken the few minutes to align as above ,and never installed one 180 out.--steve
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1968 Z28
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« Reply #282 on: August 17, 2014, 12:02:05 PM »

Hey Jon, thanx very much for that info. It's a lot to take in, especially for a backyard mechanic such as myself. Seen that rubber piece you were talking about, pretty cool. I never knew it was there until I heard it mentioned in one of the replies.

Going to adjust the Valves Sunday. Then pull the Distributor and send off for rebuild. Wish I could also send the Alternator, Master Cylinder, Calipers and a few other goodies.... But that takes $$$  Sad   Then will change the oil and the spark plugs again. When Dist. comes back I can drop it back in and start my trouble shooting issue back up.

 In the mean time, found this tag on the car. It was stuck on and seems original. Can you guess where on the car it was located???... Danny
Forward lamp harness.
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Jerry G.

Z28-1968-07C-Norwood
Ermine White, Red Std. Interior
2nd. Owner, 38,000 miles
dannystarr
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« Reply #283 on: August 17, 2014, 06:51:44 PM »

Jano,
 No I didn't know that. I remember some of that info from years past, but thanx much for reminder.
 
 90 degrees out here in Northern CA and too hot right now to fire it and heat it up for valve adjustment. So gonna wait for 74  degree day. Or there about...

 As for the 5054 tag, we have a winner!! Pictures below show the tag in place.
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dannystarr
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« Reply #284 on: August 17, 2014, 06:55:01 PM »

Again
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