View Full Version : 1969 Z-28 041 heads
budnate
08-25-2005, 08:24 AM
1969 Z-28 , 2.02 Heads Complete, 3947041, dated D/11/9 & J/8/8, told only been rebuilt once and he had them done, washed them up and glass beaded the surfaces and everything looks fine, you get the same warranty I got, None, you need to be comfortable buying them “as is” like I did, $275.00, only thing screwy, is two of the ex guides slide down out of the place and are hanging down, many detailed pics for the buyer.
budnate
08-25-2005, 08:29 AM
1
budnate
08-25-2005, 08:29 AM
2
budnate
08-25-2005, 08:30 AM
3
rsatz28
08-25-2005, 04:19 PM
Bud, You have a PM.
budnate
08-25-2005, 07:48 PM
SOLD- pending payment.
Bud:
I also have an extra set of 041 heads, but have been reluctant to advertise them as being correct for a Z/28 even though Colvin's book states they were interchangeable with the 186 heads. I am NOT implying you should not have listed them as such, but am just curious. Have any original Z/28's been documented with 041 heads? Frankly I can't see any difference between the 041 and the 186 other than the casting symbol. Have been told the 041 actually flows slightly better. Also, seems like every Z11 and Z10 car with the original 295 horse 350 has 041 heads.
Thanks in advance for any input.
Lynn
Astock
08-26-2005, 02:17 AM
The easy way of determining original 202 heads is looking at the two outer walls that separate the four chambers/pockets of valves.The two outer walls (that separate the big valves from each chamber)are thinner than the middle one. 194's are all the same thickness.
I agree Jim. I don't think there is any dispute that some of the 041 heads were machined from the factory for 2.02 intakes. Also don't believe there is any question that some Corvettes came with 041 heads, some with both 2.02 and some with 1.94 intake valves.
However, I am wondering if anyone is aware of an original 69 Z/28 that came with 041 heads. I should ask Jerry M, as he has likely looked at as many original cars as anyone in the country.
Lynn
Salvatore
08-26-2005, 03:44 AM
041's didn't come on 69Z's. 186 casting did. 041 were small valves and 186's also had a 1.94 intake valve. 350/300hp cars were 1.94's. some 186 casting suppositly showed up on SS cars, but I never saw them.
rsatz28
08-26-2005, 05:57 AM
The pics Bud sent me, these 041 heads have 202's and 160's
[ QUOTE ]
041's didn't come on 69Z's. 186 casting did. 041 were small valves and 186's also had a 1.94 intake valve. 350/300hp cars were 1.94's. some 186 casting suppositly showed up on SS cars, but I never saw them.
[/ QUOTE ]
Sam:
I have seen quite a few 186 heads on 69 350's. In fact I almost bought a 69 full size a few years back just to get the block and heads (which were both 186's) a real "old lady's car that had not been tampered with. A friend of mine bought a full size chevy for the same reason and it turned out to have a 186 head on one side and an 041 on the other, with casting dates within a week of each other and just prior to the build date. Both still had the factory head gaskets.
Like you, I have never seen a Z/28 with 041 heads, but Colvin's book clearly states it could be. I have always been skeptical.
Anyone else?
Lynn
Jonesy
08-26-2005, 07:57 AM
My car has 186 heads and is an SS350 car and the heads are original.
I doubt any 041 head came on a 69 z28. 041 heads came on Tonawanda built engines in the many cases I have seen. I have never seen a documented DZ engine with 041 heads.
budnate
08-26-2005, 09:03 AM
Honestly dont know guys, the book said application so I went off that, and as far as I can tell these are stock looking heads with screw in studs and big stock looking valves, spring pockets are stock "not" "cut" /opened up for oversize springs, no Z expert by a long shot but they sure looked stock to me.
Mortec says the same thing....I would agree Colvine may be wrong, but Mortec surely would have corrected any typo being a online site that can be corrected with a key stroke.
3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
I will take this to pm with Rob, but just so we are clear I am very honest and dont sell Junk, and if I dont know about something I tell ya up front if its junk or what ever. I also will take back anything from a member on this site minus shipping if they think they dont like whatever they picked up.
no offense taken, this is just for all the lurkers that dont speak up much I dont want them wondering wtf?? about me.
Bud.
Salvatore
08-26-2005, 03:37 PM
69 Z/28 heads have pressed in studs. I believe the LT1 186 heads started the screw in studs. I am not really going by a book just memory. Could be a little foggy these days. http://www.yenko.net/ubbthreads/images/graemlins/eek.gif
DarrenX33
08-26-2005, 04:39 PM
[ QUOTE ]
I am not really going by a book just memory
[/ QUOTE ]
Your memory is as sharp as a tack! http://www.yenko.net/ubbthreads/images/graemlins/biggthumpup.gif
Schonyenko2
08-26-2005, 06:10 PM
I believe Colvin's book also lists 041 heads for 70 Yenko deuces.I discussed this with Marlin some time ago, and so far none have been found with them on.
They're a very good head.
YENKO DEUCE REGISTRY
08-26-2005, 07:21 PM
To our knowledge and research, the Z28 engines came with 186's from the factory, and the replacement head was the 041. Several claims have been made that the 041 was factory installed, so we checked into it and found none. In addition to the Z28's, we checked every deuce we could and every deuce has the 186's.
I wonder what the Certified Stock ruling would be on this issue? If you pulled the cover and found a pair of 041's, would they bounce you - Rob?
rsatz28
08-26-2005, 07:42 PM
[ QUOTE ]
They're a very good head.
[/ QUOTE ]
So, they would be good heads to have on a properly built SB?
Just as good if not better than the 186 head.
Bud: I don't doubt your honesty in any way, and that was not my intent when "hijacking" this thread. I was just curious. Glad no offence was taken.
Lynn
68l30
08-26-2005, 08:30 PM
Does any one else have any 68 041's? My 68 L-30 has a set.Cast in late June F 26 ( I think) on a 0702EE block.Hard to find another L-30 that late in 68.Does not have accessory holes in the front of the head either......Anyone?
Steve
DarrenX33
08-26-2005, 08:35 PM
Bud your first thru the spanking machine next weekend. http://www.yenko.net/ubbthreads/images/graemlins/grin.gif
Mr. T
08-26-2005, 09:09 PM
That sounds too kinky for me
DarrenX33
08-26-2005, 09:14 PM
2nd. http://www.yenko.net/ubbthreads/images/graemlins/haha.gif
budnate
08-26-2005, 09:52 PM
Good lord!! Darren not me!, Bob, Denise and myself or going to hold up in some ones trailer with a cooler full of cold ones........
just in '71 Z-28 heads...lots of pesos.
DarrenX33
08-26-2005, 10:07 PM
[ QUOTE ]
Bob, Denise and myself
[/ QUOTE ]
http://www.yenko.net/ubbthreads/images/graemlins/haha.gif
[ QUOTE ]
Does any one else have any 68 041's? My 68 L-30 has a set.Cast in late June F 26 ( I think) on a 0702EE block.Hard to find another L-30 that late in 68.Does not have accessory holes in the front of the head either......Anyone?
Steve
[/ QUOTE ]
Steve:
This is the first I have ever heard of 041 heads for 68 without the accessory holes. Are the bosses present, but just not drilled?
Lynn
Salvatore
08-27-2005, 12:32 AM
No bosses present.
budnate
08-27-2005, 01:39 AM
[ QUOTE ]
Does any one else have any 68 041's? My 68 L-30 has a set.Cast in late June F 26 ( I think) on a 0702EE block.Hard to find another L-30 that late in 68.Does not have accessory holes in the front of the head either......Anyone?
Steve
[/ QUOTE ]
didnt we discuss your heads over at Chevytalk this last fall???
68l30
08-27-2005, 10:03 PM
I don't believe so.(FYI just signed on and searched for info there,can you get me a link to the topic?)....Yes,they do have bosses.Here are some pics......
Steve
68l30
08-27-2005, 10:05 PM
casting # and date.....
Steve
Salvatore
08-27-2005, 11:07 PM
Do the 68 double hump, big valve heads have bosses? I don't think the 68 Z heads have any bosses. http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif
budnate
08-27-2005, 11:32 PM
[ QUOTE ]
I don't believe so.(FYI just signed on and searched for info there,can you get me a link to the topic?)....Yes,they do have bosses.Here are some pics......
Steve
[/ QUOTE ]
Steve you will have to search..I recall talking about a motor in car a guy was looking at and he had the same heads, I couldnt believe they were not drilled and threaded for acc...I looked last night a little also and came up empty, try anything I replied to or something like help me decode my motor....
Bud.
68l30
08-27-2005, 11:33 PM
No,only the 041's did.I've been curious as to when production started in the 68 model year on this head.Is late June the earlist production?Did any of the SS 350 cars use it late in 68? Just digging for more info on the late L-30 cars.......
Steve http://www.yenko.net/ubbthreads/images/graemlins/beers.gif
68l30
08-27-2005, 11:40 PM
Thanks Bud,I know I asked/posted over at the CRG........No results.I'll search again on CT.......
Steve
budnate
08-28-2005, 12:26 AM
do some digging... then post up, guy was / is a reg on there with us..I have hazy recall about a 68 red vert he was looking to buy and there we discussed the motor after he posted pics while trying to decode the car to make sure it was right..supposed nice old man car clean driver cond,,,I dont think he bought it though for some reason....
69rsz28
08-29-2005, 07:46 AM
This guy is pretty confident about the 041 head. Ebay (http://cgi.ebay.com/ebaymotors/1969-CAMARO-Z28-RS-SS-302-DZ-HEADS-68-69-CORVETTE-350_W0QQitemZ7996177682QQcategoryZ33617QQrdZ1QQcmd ZViewItem)
[ QUOTE ]
This guy is pretty confident about the 041 head. Ebay (http://cgi.ebay.com/ebaymotors/1969-CAMARO-Z28-RS-SS-302-DZ-HEADS-68-69-CORVETTE-350_W0QQitemZ7996177682QQcategoryZ33617QQrdZ1QQcmd ZViewItem)
[/ QUOTE ]
I have still never heard of a documented case of 041 on a 302. Not saying it couldn't happen, just haven't seen it. I have to be a bit skeptical of this guy, especially in light of this statement:
"According to GM, a book called "Chevy By The Numbers" and other experts these heads were only used in late 68 and early 69. Then they were replaced by the heads with casting number #3927186....Most all experts agree that these heads are in fact very-very-very rare."
They were definitely made all through the model year. I had a set dated Sept of 69. I have seen several on pace cars and Z10's made in April & May.
Don't know where he is getting this info.
Steve:
Your heads are quite interesting, and obviously used at the end of the 68 model year even though they were cast for the 69 as evidenced by the bosses. Have heard stories of other early 69 parts that made it on to late 68 cars, but yours is the first I have actually seen pics of. Pretty cool.
Lynn
68l30
08-29-2005, 05:10 PM
My Radiator has a 69 code as well.......I'll get the # if interested.Strange things happen late in production..... http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif
Steve http://www.yenko.net/ubbthreads/images/graemlins/beers.gif
Salvatore
08-29-2005, 08:26 PM
[ QUOTE ]
This guy is pretty confident about the 041 head. Ebay (http://cgi.ebay.com/ebaymotors/1969-CAMARO-Z28-RS-SS-302-DZ-HEADS-68-69-CORVETTE-350_W0QQitemZ7996177682QQcategoryZ33617QQrdZ1QQcmd ZViewItem)
[/ QUOTE ]I think he will keep them for a while at that price.
budnate
08-29-2005, 08:58 PM
not trying to be a smart a$$ here but lets back up a little,
there seems to be sources out there stating clearly they were on a 302 motor, and the e bay seller obviously has some 1968 dated 041 heads, granted he has taken some liberties in his description but he did scan the book into his add,
lets just for arguments sake ask the question.. if you guys personally have not seen them on a car, what do you suppose they built them for in 68/69 ???? CE stuff ??
Bud.
68l30
08-30-2005, 12:57 AM
Just looked at the eBay ad.......They changed the casting # 4 in the part number.Looks like they used a closed 4 not the open shown on my heads.....Like to put them side by side to note any other changes....FYI,mine have the 1.94 intake valves not 2.02...I always thought they were all 1.94's.
Steve
Salvatore
08-30-2005, 01:03 AM
They may have been over the counter or warranty replacement items. http://www.yenko.net/ubbthreads/images/graemlins/dunno.gif
rsatz28
09-14-2005, 11:32 PM
[ QUOTE ]
[ QUOTE ]
This guy is pretty confident about the 041 head. Ebay (http://cgi.ebay.com/ebaymotors/1969-CAMARO-Z28-RS-SS-302-DZ-HEADS-68-69-CORVETTE-350_W0QQitemZ7996177682QQcategoryZ33617QQrdZ1QQcmd ZViewItem)
[/ QUOTE ]I think he will keep them for a while at that price.
[/ QUOTE ]
Looks like he is.
[ QUOTE ]
not trying to be a smart a$$ here but lets back up a little,
lets just for arguments sake ask the question.. if you guys personally have not seen them on a car, what do you suppose they built them for in 68/69 ???? CE stuff ??
Bud.
[/ QUOTE ]
Bud, not saying they were never used on production cars. Just saying I have never seen them on 302's. Seen plenty on 350 295 horse engines. In fact seems like almost every Z10 or Z11 L48 has the 041 heads. Even saw an original January 69 built full size car with 350 that had a 186 head on one side and an 041 on the other.
So I know they are interchangeable, as Colvin says, just haven't seen them in a 302, or for that matter in any application with 2.02 valves from the factory, but then I have virtually no Corvette experience. Maybe someone with NCRS experience can help out.
Lynn
vBulletin® v3.8.11, Copyright ©2000-2025, vBulletin Solutions Inc.