Question on Quadrajet Bolts

[Larry E.]

We know the quadrajet bolts (to secure to I/M) consisted on two long bolts in
front and two studs on back on I/M on the L36 in 1968. Where the other engines
(even on cast iron I/M) secured the same way or did they have two smaller bolts
in the back insted of studs? When did Chevrolet switch over to all bolts insted
of a combination of bolts and studs? Thanks in advace. Larry

[Joe L.]

Re: Question on Quadrajet Bolts

We know the quadrajet bolts (to secure to I/M) consisted on two long bolts in
front and two studs on back on I/M on the L36 in 1968. Where the other engines
(even on cast iron I/M) secured the same way or did they have two smaller bolts
in the back insted of studs? When did Chevrolet switch over to all bolts insted
of a combination of bolts and studs? Thanks in advace. Larry

Larry-----


All 1968-71 engines with Q-Jets used the same bolts-front, studs-rear carburetor attachment. Things changed to all bolts for the 1972 model year and thereafter

[Terry M.]

Re: Question on Quadrajet Bolts

Larry-----


All 1968-71 engines with Q-Jets used the same bolts-front, studs-rear carburetor attachment. Things changed to all bolts for the 1972 model year and thereafter[/QUOTE]

Here you go: The first photo is a 1970 Q-jet and the second is a 1972.

Copy (2) of 1970 #28(2).jpg1972 BB #21934-1.jpg

BTW: You will not get either the front bolts or the rear nuts at you local hardware store.

[Joe L.]

Re: Question on Quadrajet Bolts

Larry-----


All 1968-71 engines with Q-Jets used the same bolts-front, studs-rear carburetor attachment. Things changed to all bolts for the 1972 model year and thereafter

Here you go: The first photo is a 1970 Q-jet and the second is a 1972.

Copy (2) of 1970 #28(2).jpg1972 BB #21934-1.jpg

BTW: You will not get either the front bolts or the rear nuts at you local hardware store.[/QUOTE]


Terry-----


I think it was a dumb thing to replace the studs with bolts. The studs help to easily locate and position the gasket, heat shield and carburetor.

[Terry M.]

Re: Question on Quadrajet Bolts

Here you go: The first photo is a 1970 Q-jet and the second is a 1972.

[ATTACH=CONFIG]46118[/ATTACH][ATTACH=CONFIG]46117[/ATTACH]

BTW: You will not get either the front bolts or the rear nuts at you local hardware store.

Terry-----


I think it was a dumb thing to replace the studs with bolts. The studs help to easily locate and position the gasket, heat shield and carburetor.[/QUOTE]

Joe,
From our perspective it sure was. Want to bet the bolts (as installed) cost less than the studs and nuts?

[Jeff P.]

Re: Question on Quadrajet Bolts

Not to get off the subject ,Terry I noticed the thermostat housing has a stud and nut on the passenger side. I've never seen it on a 68. Should they be set up like that?

[Terry M.]

Re: Question on Quadrajet Bolts

Not to get off the subject ,Terry I noticed the thermostat housing has a stud and nut on the passenger side. I've never seen it on a 68. Should they be set up like that?

Neither of those pictures is of a 1968. There is a good chance there is no stud on 1968 due to the different accessory drive mounting system. That stud had no Corvette application, and the applications that used it were, I think, later than 1968. This is just another of those wonderful 1968 features.

[John H.]

Re: Question on Quadrajet Bolts

Want to bet the bolts (as installed) cost less than the studs and nuts?

You betcha - bolts are always less costly than studs and nuts.