EGR port cleaning - Honda Prelude Forum

melmar1987 · 03-15-2009, 07:01 PM

I just got done doing my egr ports and i took some pics for those who would like to see how i did it.

these are the brass ports that i had to drill through, all together there are 6 ports, and i drilled and replaced them all.

I used a 1/8" drill bit, i had to use an extension later because the drill wouldnt clear a part on the intake manifold.

A hammer and punch

slide hammer

with a self taping screw to dit in the 1/8" hole, I dont know the scew size i just found one laying around and it fit. You should be able to use a screw with a slightly larger diameter and it should work. also the cup that conects to the slide hammer.

and a modified shop vac

First i had to remove these bolts to get acess to the driver side plugs. I also took out the pcv valve to make it easier.

Then punch a dent in the plug, preferably in the middle, using the punch. This is just to guide the drill bit when you drill the hole.

It looked like this when i punched the dent in the port plug.

then drill a hole through the plug, you dont want to go through the IM so be carefull. You will feel the difference when you get through the plug though.

then using the screw and the hammer cup end, screw the screw into the hole whith the cup atached.

Atttach the hammer

pull the plug

And my ports were chucked full of carbon, so the longest part of this project was cleaning the ports.

then put in the new plugs, cone side down, and make the edge of the plugs flush with the manifold.

I used the shop vac to clean all of the shavings and the carbon build up. I used a can of brake cleaner to clean the ports also. And it would be a good idea to use some grease on the drill bit to collect the shavings and to protect the bit from breaking off in the plug. This did happen to me and it was a B**** to get out. It took me two hours, to do the whole thing. About 20 mins to drill and pull the plugs, about 30 mins on the one plug that the bit broke off in

about an hour and 15 to clean the ports good. I used a .22 cal gun cleaning brush and a coat hanger. And only 5 min to put in the new plugs.
The car runs so much better and now i know what they mean when they say "you can feel the vtec kicking in". It does feel a whole lot better. And that anoying CEL is gone for good. If you guys have any questions feel free to ask. By the way i have a 98 base with 158k miles.

Solid · 03-15-2009, 08:14 PM

Mine were clogged shut like that too. I did mine at about 139K

hondaequikppd1 · 05-10-2009, 03:10 AM

Quote:

Originally Posted by melmar1987

I just got done doing my egr ports and i took some pics for those who would like to see how i did it.

these are the brass ports that i had to drill through, all together there are 6 ports, and i drilled and replaced them all.

I used a 1/8" drill bit, i had to use an extension later because the drill wouldnt clear a part on the intake manifold.

A hammer and punch

slide hammer

with a self taping screw to dit in the 1/8" hole, I dont know the scew size i just found one laying around and it fit. You should be able to use a screw with a slightly larger diameter and it should work. also the cup that conects to the slide hammer.

and a modified shop vac

First i had to remove these bolts to get acess to the driver side plugs. I also took out the pcv valve to make it easier.

Then punch a dent in the plug, preferably in the middle, using the punch. This is just to guide the drill bit when you drill the hole.

It looked like this when i punched the dent in the port plug.

then drill a hole through the plug, you dont want to go through the IM so be carefull. You will feel the difference when you get through the plug though.

then using the screw and the hammer cup end, screw the screw into the hole whith the cup atached.

Atttach the hammer

pull the plug

And my ports were chucked full of carbon, so the longest part of this project was cleaning the ports.

then put in the new plugs, cone side down, and make the edge of the plugs flush with the manifold.

I used the shop vac to clean all of the shavings and the carbon build up. I used a can of brake cleaner to clean the ports also. And it would be a good idea to use some grease on the drill bit to collect the shavings and to protect the bit from breaking off in the plug. This did happen to me and it was a B**** to get out. It took me two hours, to do the whole thing. About 20 mins to drill and pull the plugs, about 30 mins on the one plug that the bit broke off in

about an hour and 15 to clean the ports good. I used a .22 cal gun cleaning brush and a coat hanger. And only 5 min to put in the new plugs.
The car runs so much better and now i know what they mean when they say "you can feel the vtec kicking in". It does feel a whole lot better. And that anoying CEL is gone for good. If you guys have any questions feel free to ask. By the way i have a 98 base with 158k miles.

great info/pics, im planning on doing this next, i ordered the ports..but wadyu say about this, how do i approach this? it looks like welded aluminum or somthing..

hondaequikppd1 · 05-10-2009, 06:00 PM

Quote:

Originally Posted by Solid

Mine were clogged shut like that too. I did mine at about 139K

how did you do the cleaning?

tom27897 · 05-10-2009, 06:40 PM

nice write up, this is now on my list of things to do lol

brotherdog · 05-12-2009, 09:36 AM

excellent guide, ive seen other write ups,, but this one made a lot of sense,, but yah how do u clean../what did u use.?

bouckarooo · 05-12-2009, 10:11 AM

awesome write up my freind but i am having a hard time finding the egr plugs that you replace, where did you get them, i phoned honda and they cannot find the part number for them so i am unsure what to do. where did you get the replacement plugs? thanks for the picts and instructions man they are the most helpful egrinstructions i have ever seen

Kronn 98SH · 05-12-2009, 01:23 PM

17199-PT3-AHM x6

Mattpasa · 05-13-2009, 12:14 AM

great write up

Quote:

Originally Posted by Kronn 98SH

17199-PT3-AHM x6

Is this the same part number for 4th gens??

Kronn 98SH · 05-13-2009, 12:43 AM

Quote:

Originally Posted by Mattpasa

Is this the same part number for 4th gens??

According to what I've read, it's the same for ALL Honda EGR systems.

98h22a4_81 · 05-13-2009, 01:13 AM

wow...really nice write-up....did mine the same way....guess i didn't clean it that good cause CEL came back on, so i took the whole IM off and clean it again....now no CEL....

98h22a4_81 · 05-13-2009, 01:14 AM

Quote:

Originally Posted by hondaequikppd1

great info/pics, im planning on doing this next, i ordered the ports..but wadyu say about this, how do i approach this? it looks like welded aluminum or somthing..

that sh1t don't look right....

bouckarooo · 05-13-2009, 10:54 AM

Thanks man, i have the new plugs coming from honda today, i cant wait to clean them, i hve put on 130,000 k without cleaning them so i think it will make a huge difference. Thanks for the great write up and the part numbers!!

hondaequikppd1 · 05-13-2009, 09:16 PM

Quote:

Originally Posted by 98h22a4_81

that sh1t don't look right....

es it does, what should i do, i wonder if there is plugs under the welds, or maybe its just welds, damn i ordered the plugs already..

TheJGB-2KTypeSH · 05-19-2009, 11:16 PM

I have only seen those welds on 4th gen intakes, you can drill the weld off do your cleaning and install the new port plugs..

kcpit · 06-02-2009, 09:41 PM

thanks for the pics i am sure mine need to be cleaned just bought a 88 prelude si b20a5 runs like a beast till it warms up then i cant go over 3000 rpms with out it cutting out and trying to die going to try this before i replace the egr valve
thanks again
kcperformanceimportsandtuners.com
kc performance imports and tuners car club

oswalt · 10-09-2009, 06:11 AM

Of course I found this site too late. I got an insufficient flow code and was wondering how to clean it out. The pictures won't come up anymore. Anyone have them saved?

JohnM10 · 10-09-2009, 11:23 AM

Another nice write up is here:
DIY Slide hammer for EGR port cleaning w/ pics - Preludepower.com