Yup, that'* the one. Even without the reinforcements. :? But hey, if she survives another 100k miles, maybe I'll splurge and buy her a new Dorman manifold

Yeah, I'm kinda surprised myself -- and the guy I bought it from said it'* out of an '02 -- I wonder if it came from the factory with a two-year-old manifold on it? Or if the salesman was ... er, misinformed

-b

Those are good pictures thank'* for posting them. Before you buy a new overflow tank take yours off and fill it with 50/50 bleach and water over night, worked for me. Comit and a brush cleans the outside ok.

I know Pure Performance Fever has a kit to reinforce these.... Check it out!

Dittos. Man, does that suck. I thought I'd be able to get by without having to change it.

So much for thinking GM went to an improved intake starting in 99.....

Makes me wonder why there'* not a GM TSB out there for anything 99 and newer for the upper intakes. They must have changed SOMETHING.

My 99 has a 195 thermostat and is 100% stock.

The casting date on the upper intake is 01/99.

Something had to have been improved, though, because GM doesn't have any TSBs for 99 and newer...coupled with the fact that I only know of one person having an upper intake problem on a 99 and newer (was actually on a 99).

maybe you guys could find the answer if you stopped just looking at the upper intake and looked at the egr system as a whole, since that'* what causes the problems.

here'* a free tip: have someone with a brand new series 2 n/a take a picture of their upper intake and see what'* going on. once you've seen that, then start looking at other things...

matt

free tip #2:

if you find that the *new* upper intakes that aren't failing are the same as the old ones, start asking yourself what an aftermarket kit that changes the design of that intake will do to the egr system as a whole...

just some food for throught

matt

the 99 and newers are just coming into the problems now on milage.

mkaake - the failures are a result of a thin walled coolant passage, and heat from the engine, and the EGR system.

trust me, i know. just suggesting (very strongly) that the upper intake is not the only part of the equation, and so you should never *just* look at the upper intake. also suggesting that if the upper intakes that are being made today are the same as the ones that were being made in '96, then something other than the upper intake was changed - and you'd be better off looking for that instead of changing the characteristics of your upper intake manifold...

matt

We already know that GM went to an improved intake at some point after 2000. Now, looking at the whole picture, we're trying to figure what was exclusive on 99 to not warant a TSB and not have seen many coolant issues.