928 at last

This is nuts. I've washed out the intake like 5X now, with a scraping with dental picks etc. after each, and every time, after it drys, there some more lose or peeling crap on the inside of the channels. AARRGGHHH.
Really don't want to risk the engine sucking this stuff in on start-up. So I'm looking and scaping, looking and scraping....
I'd really reccomend when getting the intake prepped, that a full on media blasting is in order.......Preferably soda but.........
And then after, a thorough inspection and wash.......but this manual thing blows!
Bearing in mind this is a '90. I wouldn't even want to think about an older one.

the flyin' scotsman

Its interesting your having issues............is it an ex-Japanese car?

My car is Canadian and when I did the intake and valve cover refresh there was no need for re-paint..........170k kms.

Responses may be irratic........watchin' Crosby and the boys

928 at last

Hey Malcolm!
No, this one was delivered in Florida and had spent it's life in the southern US prior to my absconding over the border with it. One of McHoldfast's fleet prior.....

Just about done now...both patience and anything loose I can find.....

ROG100

Do you mean loose as in Loose Women?

928 at last

Either way.... the scaping off isn't pleasant! Paint flakes..women....whatever.........!

Ever since I heard about the issue......

Anyway, I'm at the point now where I'm prepared to let the pistons & rings just deal with whatever I've missed...which isn't much...trust me on that one.....

Rob Edwards

Don't stop until those runners are lickably clean- I stopped by 928Intl last week, there was an engine on a pallet headed out to someone who fed their motor some powdercoat chips.

You could always send it to Greg, he'll clean out the runners thoroughly:

soontobered84

Rob,
+1 on the lickably clean. Blackshark inadvertantly fed his engine what we believe to be a somewhat small amount of soda blasting media. To say the results were not pretty would be an understatement. The engine ran less than 30 minutes and completely destroyed all the brand new rod bearings, cylinder walls, rings, etc. Basically everything that moves within the engine is now toast. Please clean that intake until everything that comes out is totally clean.

ROG100

John, I told Rob about Richards engine and that is why he is being overly cautious.

928 at last

Rob, I really didn't need to see how clean that one is. I'm going to go crawl under my workbench and assume the foetal position now.

Jascd

I did my intake a few months ago, had the benefit of first buying a spare which I tried to strip manually, got the outside pretty good, but could not get the interior coatings to shift much. In the end I sent it to a soda blaster and for $100 got it back bare. Fantastic job. Looks great back on the car, only thing is it makes my unrestored cam covers look terrible - the next job.


Jason
89S4

928 at last

Hey Rob,
How did the one in the picture actually get that clean?

928 at last

Hi John,
I can understand the blasting media being an issue. With the chips though, I'm willing to bet that my motor's already digested a few chips here and there, just judging from what was left inside when I first took it off. It's "clean" now, just, as the saying goes, "it ain't pretty". What's left is still bonded. And one benefit of the detail work I've done is that I'm damn sure there's no media left from the exterior powder coating work.

mcholdfast

I'm so glad she wound up in a good home.
I had the powdercoater blast mine. I spent a couple of hours afterwards making sure I had all of the residue cleaned up. I can't imagine trying to strip the innards of the intake manually. It seems like it would go on indefinitely.

928 at last

Love the car. Handles great. no tramlining. Still has the toe issue..it's on the list...new timing belt and water pump with PKensioner set up last summer, now the full on top end work.....next up is a re&re on the power steering.

Manually stripping.........hmmmm "indefinitely" may be too strong a word....for F%#King ever I feel is a more appropriate descriptive adjective. Problem is too that it's already coated, so I'm paranoid about sending it back out for the interior work...and I don't know anyone with a blaster set up.......next time though.......

cold_beer839

Would an extrude hone process work on these intakes?