HKS 1.8 Cast Turbo Manifold Plug question
#1
HKS 1.8 Cast Turbo Manifold Plug question
On the now discontinued HKS 1.8 manifold there is a threaded hole on the bottom of it which I'm guessing was to hook up the EGR. I bought this manifold used from here, and it came with a plug. I was just driving around today and the plug fell out, causing a crazy amount of exhaust to come pouring out of the manifold and into the engine bay. I found the plug on the road, and the threads are totally screwed on the plug (it's the wrong plug). Does anyone have any idea what thread type/bolt size this hole is? I'd rather not have to take my manifold out. I put the old plug back in and it'll probably last a day...
#4
Well you could measure it and get a ballpark then go to a hardware store and look at their NPT pipe plugs and see how they fit. If it's tapped in a pipe thread size you should be able to get pretty close with 1/4", 3/8", 1/2", 3/4" inch-those are common sizes. They probably also have reducers you can use to plug the EGT into if needed.
#5
Well HKS was totally useless. The lady on the phone said it was a factory replacement part, and they don't have any specs on it.... yah ok. So I think I'll go the route scotty suggested and just get a general measurement, and just pick up a bunch of bolts. There are very few threads in it so I can't really get a proper feeler gauge.
#6
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One thing you might try to aid the plug in fitting (assuming there may be some damage to the threads in the manifold) would be to go to the auto parts store and pick up a tube of muffler patching putty. I have no idea how well it'll hold up on an exhaust manifold as compared to a muffler, but it's gotta be better than nothing, and since you're essentially just using it as a thread sealer / locker, I'd wager it might have a fighting chance.
#7
Hmm that's a good suggestion. I was thinking about slathering some JB Weld on the threads, and putting the plug in. Not sure how well it handles temperature though. This would be a lot easier if the turbo wasn't on the car, and I just put it on so I don't really want to take it off.
By the way, thanks everyone for posting ideas.
By the way, thanks everyone for posting ideas.
#10
green loctite on a brass plug. shouldnt go anywhere.
Loctite Consumer Retail Products | Product Detail
Loctite Consumer Retail Products | Product Detail
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