Quick question on carbs

[zak_62]

Hi.
When I am cleaning the carbs, some dried glue coat thing peels off the surface of the carbs. What should I do with those? Can I just touch them up with the ultra black silicon seal?

[Esprit2]

zak_62 said:

When I am cleaning the carbs, some dried glue coat thing peels off the surface of the carbs. What should I do with those? Can I just touch them up with the ultra black silicon seal?

Generally speaking, sealants are not used in carbs. Specifically, none is used in Dellortos. If what you see is the remains of an old gasket, scrape it all off and throw it away. Install all new gaskets.

If it's sealant residue like silicone, scrape it all off and throw it away. If the joint requires a gasket, install a new one with no sealant. Do not try to make up for a missing or torn gasket by smearing sealant on the joint.

[lotusguy]

zak_62 said:

Hi. When I am cleaning the carbs, some dried glue coat thing peels off the surface of the carbs. What should I do with those? Can I just touch them up with the ultra black silicon seal?

Zak,

The Dellortos (DHLA 45 'M') on your car are made to be pressurized up to 12PSI. You don't want anything but a clean surface and a new gasket to insure a tight seal. I dunno what you got on yours as the gasket is supposed to be a Butyl rubber and so should not leave any trace. If a P.O. substituted paper gaskets used in the normal DHLA, you definitely want to switch back to the proper ones. Happy Motoring! ...Jim'85TE

>> Edited by lotusguy on Tuesday 17th August 06:09

[zak_62]

I don't mean the contact surface between pieces. This are on the shell of the places where pin like stuff is driven into the carburetor body. There are yellow-brown color seals on it, and these seals peels off.

>> Edited by zak_62 on Tuesday 17th August 14:42

[lotusguy]

zak_62 said:

I don't mean the contact surface between pieces. This are on the shell of the places where pin like stuff is driven into the carburetor body. There are yellow-brown color seals on it, and these seals peels off. >> Edited by zak_62 on Tuesday 17th August 14:42

Zak,

It's hard to diagnose long-distance, but it sounds to me as if you are describing varnish. This is a by-product of gasoline and is partly/mostly why you need to clean and rebuild the carbs every 5 years or so. If it's built-up to the extent you describe, I suggest that your maintenance is long overdue, good thing you're taking care of it.

Use a good carb cleaner, tolulene is probably best, but nasty to work with, so be sure you have lots of ventilation. You want to soak the carb pieces for at least several hours to dissolve this nasty stuff, especially the air correction tubes, jets and really anything with small orifices. Do not use anything to insert into the holes, rather use an old toothbrush (have several on-hand as the tolulene will attack them too), then use compressed air to blow everything clean and dry. Your floats are foam, so don't soak these, rather wipe them with a solvent soaked rag and dry immediately. Good Luck! Happy Motoring! ...Jim'85TE