costpenn

I know that the 68-69 W-30/W-31's are not supposed to have hood insulation, but does anyone know specifically where this is called out for in any factory documentation? And does anyone know why? Doesn't save any appreciable weight - maybe it was to give the ducts a little extra clearance?

costpenn

Anyone on this? Or should I post in the Tech section - Joe P?

kkroger

It should be called out in the factory assembly manual.
Mine is packed up somewhere.

The OAI pages of the factory assembly manual should have it though.

72xw30

Hi there,

My original 68 and 69 W cars both have hood insulation?

Anyone?? Steve M will know??.

Cheers,

Sam

starfire

My assembly manual says:

398896 - INSULATOR
(EXC. 3100 & 3200)

I believe that the 3100 and 3200 references F85 w/L6 and F85 w/V8 respectively.

There is no reason they would leave the hood insulation off for duct clearance as the AM shows the ducts are clearly below the level of the top of the air cleaner. If the air cleaner clears the insulation the ducts would too.

Who told you W-30's shouldn't have hood insulation?

Jonb442

Could you be thinking of '70-'72 cars? The OAI hood had no insulation.

costpenn

When I first restored my 68 Hurst, I took it to the Nationals and had points deducted in the judging because "all W cars should not have hood insulation" -even the 68-69's. When I argued the point, the Badgleys told me they have the documentation to prove it so, but I have yet to see it. There were 5 68's at that Nationals (1999) and mine was the only one to have it so I thought maybe I'm wrong about it, but I could never find anything in the assy manuals about having the insulation removed.

BTW thanks for responding to my post.

junior supercar

I'll include the 69 W-32 also, but whoever told you that is wrong

starfire

Well Badgely's certainly know their Oldsmobiles, but maybe they were saying that Hurst Olds' didn't have hood insulation, not that all W cars shouldn't?

Maybe Doc stripped off the hood insulation before putting the 455 in?

1969Hurst

Yep, perhaps they were just referring to H/O's, anyhow, on a 1969 H/O the hood insulation 'delete' appears on the larger broadcast sheet, see attached.

joe_padavano

Well, you kind of have to delete the insulator on a 69 H/O due to the hood scoop.

Bernhard

Was there a option to delete the hood insulation?
Did f85 come with it?

starfire

Not according to my Assembly Manual. I've not owned an F-85 so I don't know from personal experience.

dnmfranco

Cant speak on the 68 Hurst Olds for sure but W-31s for both those years had hood insulation and 99 percent sure the 30s as well. 69 Hurst olds no due to hood. hope this helps

wmachine

Just to clarify, as Starfire says, F85s did not have hood insulators. So F85 W31s would not have them.

jozw30

My 68 H/O didnt appear to have had insulation ever glued to the bottom & I also had the legendary "X" chalk mark. I can dig up the photo of it later if anyone is interested.....

Not claiming to have the difintiive answer. We may never know for sure. There a few "undocumented" mods on the Hurst cars.

72xw30

X chalkmark? Can you explain?

I'll head over to the garage to check my 68 Hurst to see about the hood insulation and the X?
As I posted before, both my original 68 and 69 W30 cars have the hood insulation.

Sam

jozw30

Been a while, but supposedly there was a white crayon/chalk "X" on the underside of the hood. It was supposed to tell the line guy to skip the insulation.

jozw30

Maybe the 455 sat a little higher than the 400?

1969w3155

My '69 W31 (Holiday Coupe) has traces of insulation stuck on the hood.

costpenn

I had thought of that, but when I had the insulation on mine it did not cause any problems - and mine is a A/C car.

costpenn

Sam, please let us know what you find. Also, any firewall markings. Mine was unmolested when I got it and did not have any square colored letter stamps. It did have some very sloppy E & C letters handwritten in a white ink - mostly covered by the evap. box.

jozw30

Here are the images of the hood markings on my 68 H/O. The underside of the hood had a thin coat of some cheap black paint sprayed on it at some point and the hood was tweaked bad enough that I didn't use it in the resto.

Was bored one day while the car was at the body shop and decided to see if there were any markings.

The black paint scraped/flaked right off and I found the "X" as well as a "5".

jozw30

The "5". Never figured out what this meant.

jozw30

"X" location reference.

joe_padavano

NOOOOOOOOOO!

jozw30

That was helpful.....boy, sometimes feel like you have walk on egg-shells around here.

Thanks.

joe_padavano

Sorry, but this has only come up about a million times before. Every BBO is completely identical externally and sits in exactly the same place in the engine bay. There is no difference between the 400 and 455.

jozw30

See, how hard was that?

I'm sorry for not knowing everything about each of these motors and I'll assume lots of people on here are new to Olds (or Hurst Olds) or not as obsessed and would like to learn and participate in an interesting conversation.

Frankly almost every topic on these forums has been hashed over and over.

Maybe it just be a searchable database so we dont upset the people that already know everything.

I'm sorry also, and maybe it's just me.

I apologize to the original poster for messing this up.

Joe

83hurstguy

Bumping an old thread... While perusing the '68 H/O production parts list, I found the attached info. The hood insulation was marked as "DELETE" for the '68 H/O.

Therefore, while the '68-69 W30/31/32 cars may have had hood insulation, a '68 H/O should not have hood insulation, based on observations from owners above and the production parts list.

anthonyP

Great bit of information and documentation. Maybe the Hurst Corporation was thinking of making the louvers functional on the '68 H/O, which would had been great feature on this model.

68-W46

My 68 H/O was the same...

Ryan 1969 Chevelle SS396

Great thread.


I see traces of the hood insulation on my 69 W31:-)


Ryan

68-W46

Mine had "QE" in chalk behind the A/C box on the firewall.

costpenn

Luke stumbled onto this old thread looking for some other info. Do you have any more of the image of the first picture? I am sure you noticed the second pic is a '69 broadcast card which obviously would/could not need the insulation.

83hurstguy

Joe, I only posted one picture... confused unless you are talking about the picture Jeff (1969Hurst) posted prior to me.

I do have a full copy of the document I posted, somewhere. I have been looking for it, and haven't been able to find it since I moved... it's hanging out with my "442 by the numbers" book.

I got that sheet as part of the H/OCA library information packet they sell you, it's worth the money in my opinion. It also shows you the memo for engine part numbers used for the H/O engine - showing how they started with a 98 shortblock (not a Toro engine like '69), no mention of blueprinting.

As a side note, the "X 5" marking has been found on at least two more '68 H/O hood undersides... have pictures on the other computer.