pete000

I see a lot of guys are refinishing the intake manifolds. Just how hard is it to remove. Powder coating would be the way to go I would think. 1991 type.

Thanks

AO

Well let's see...

On a scale from 1 to 10 with 1 being checking your oil and 10 being an engine rebuild, I'd put this at about a 6. Lots of stuff to take apart, and a lot of WYAIT's. Cam covers are also recommended for a complete packge, but are a bit of a PITA to do. Everything can be taken apart in an afternoon. re-assembly takes a day as well as long as you have all the bits and pieces together and aren't missing anything.

If you do it, I recommend you also do the water bridge and the thermostat elbow.

Here's a before and after on my '87.

Beofre:


After:

AO

Oh, Dwayne has the best writeup if you need a paint-by-numbers guide.

https://rennlist.com/forums/928-foru...re-w-pics.html

NoVector

Andrew - What did you use on your t-stat elbow? It looks great! / Bruce

owenstanley

I did the intake refresh on my '86 S last winter. Some thoughts -

1.) All credit for the good results go to the shop who took the job on, to my benefit. Intake dis-assembelled, cam covers removed, everything, and I mean every, single thing, was cleaned, new oil and vacuum lines, chain tensioner replacement, powder coating on the intake tubes and cam covers, new fuel injectors, replaced ISC valve and a new air flow meter were the highlights. Also looked after were the stock belt tensioner and the thermostat/housing/gaskets.
2.) Powder coating - not painting - the intake was key and looks much better than what I started with. Neither cheap nor without issues, this was the way to go. When, oh when, will the intake be off again? It does not look new, but it does look better. The 'official' color is Zermatt Silver. I have something close.
3.) After the work the car idled properly, cruise control maintained speed within about 1 mph, fuel economy went from about 15 to 19 mpg in mixed driving and all oil and coolant leaks - minor for sure but a major source of concern - were resolved.
4. The youngest 928s are 15 years old now - your is probably older - so this once in a lifetime job can't give full benefits if it's done on the drip-drip-drip approach.
5. Go for it - but do it as well as possible - once - and capture all of the benefits in one big campaign.

AO

Powdercoated when I did the intake.

mj1pate

Nice job on yours Andrew. I wouldn't give the job a quite a 6 difficulty rating. I can't imagine that the intake job was that close as hard as first time lifting an engine and retrofitting would be. If there are concerns about the lower-back and the time spent hovering over the engine, then buy a topside creeper (http://www.brandsplace.com/0384-rlp1-00020.html) I found the intake job and valve cover refinishing to be a time-taking, bolt-off, refinish and then bolt-on job, but was a whistle-while-you-work kind of affair. Didn't have to push or pull on anything, or even get dirty. Maybe a difficulty 4-5 type of job, with a pleasing, aesthetic outcome.

911tracker85

(http://www.brandsplace.com/0384-rlp1-00020.html)

I want one of these. tired back has been the limiting factor on how long I could work on my intake refresh at a time. and I worry I will dent the fender top as I get tired. my '84 is not as complex as on a 32V motor. and if you do pursue this you will sucumb to WYAAIT'itis like I have.

being on a budget I painted with caliper paint rather than PC, and also used a simulated CAD paint kit from Eastwood Garage on all those kind of parts.

from another thread, if you do powdercoat make SURE all the grunge is cleaned out. someone's new engine rebuild was destroyed by blasting media in the intake getting sucked into the motor.

good luck.