What is behind this disk?
01-01-04, 05:24 PM
#1
Full Member
Thread Starter
Join Date: Mar 2001
Location: Turtle Creek, Pa, USA (Sub of Pittsburgh)
Posts: 170
Likes: 0
Received 0 Likes
on
0 Posts
What is behind this disk?
My brother asked me what is behind what looks like a reversed freeze plug on the intake side of his engine just below the 2 center intake ports. (on the center housing of course) He said his exhaust gasket was burned through at this point but I did not think there was any exhaust behind it. Really never took the disk out before to check. Anyway What is behind it and if his fell out and is loose what is the right way to put it back in.
Thanks.
Thanks.
Last edited by RX7FAN; 01-01-04 at 05:34 PM.
01-01-04, 11:38 PM
#2
Full Member
Thread Starter
Join Date: Mar 2001
Location: Turtle Creek, Pa, USA (Sub of Pittsburgh)
Posts: 170
Likes: 0
Received 0 Likes
on
0 Posts
I may have to move this to a different spot to find out an answer... If anyone else is interested in the answer follow the thread...
01-02-04, 12:04 AM
#3
I came, I saw, I boosted.
Join Date: Apr 2001
Location: Windsor, Ontario, Canada
Posts: 1,921
Likes: 0
Received 0 Likes
on
0 Posts
Coolant passage I belive. If it fell out because its loose you need a new one. If it fell out (weird anyways!) and is tight, simple press/hammer it it back in tight.
Mayeb he was talking about the EGR passage a bit lower, beside the exhaust port? Because that plug doesnt' even touch the exhaust gasket!! LOL
Mayeb he was talking about the EGR passage a bit lower, beside the exhaust port? Because that plug doesnt' even touch the exhaust gasket!! LOL
01-02-04, 04:52 PM
#4
Newbie
Join Date: Jan 2004
Location: Coastal North Carolina
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Hi, I'm the brother with the problem. This disk is definitely behind the exhaust gasket, and the back side of the disk is covered in soot from the exhaust. When I removed the gasket it was perfected intact around the exhaust ports and only burnt through at the spot where the disk is. I hammered it back in yesterday and so far the car is running good. Are you sure about this being a coolant passage? It is not possible on my engine.
01-02-04, 05:49 PM
#6
Emerald Triangle for life
iTrader: (5)
Join Date: Jan 2002
Location: Fort Collins, CO
Posts: 552
Likes: 0
Received 0 Likes
on
0 Posts
That plug is covering an EGR passage. When I got my second motor installed, I noticed it was kinda loud. After a bit of investigation, I found that plug had fallen out and was wedged between the exhaust manifold the the engine housing. Slipped it back into place and peened it a bit and now it's fine. I'm not sure why your exhaust gasket would have been involved, though. On my car the plug was in the space between the intake and exhaust and no where near any gasket.
Trending Topics
01-03-04, 12:39 PM
#8
Emerald Triangle for life
iTrader: (5)
Join Date: Jan 2002
Location: Fort Collins, CO
Posts: 552
Likes: 0
Received 0 Likes
on
0 Posts
In the pic, it's the plug in the center iron right below the primary intake ports, right? The one that's about halfway painted orange? If so, that's the one I'm talking about.
01-03-04, 02:08 PM
#10
Emerald Triangle for life
iTrader: (5)
Join Date: Jan 2002
Location: Fort Collins, CO
Posts: 552
Likes: 0
Received 0 Likes
on
0 Posts
Right. The stock gasket dips down to (more or less) match the flange between the upper exhaust studs. Must be some kind of non-OEM gasket if it was disturbed by blowby from that plug.
01-04-04, 11:43 AM
#12
Full Member
Thread Starter
Join Date: Mar 2001
Location: Turtle Creek, Pa, USA (Sub of Pittsburgh)
Posts: 170
Likes: 0
Received 0 Likes
on
0 Posts
I agree with the gasket shape
I have not seen his gasket but my replacement gasket does not cover that disk. Yea, a little overspray did get into those ports while painting :P but nothing I can't disolve before running it. Just don't have a car for the engine anymore...
01-04-04, 03:40 PM
#13
Newbie
Join Date: Jan 2004
Location: Coastal North Carolina
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
It is a non-oem gasket and it only partially covers the hole, but it is covered enough to catch the heat. There was soot covering the actuators from the exhaust coming out of that hole.
01-04-04, 04:08 PM
#14
I wanta be with the BUC!
Join Date: Jan 2003
Location: Knoxville, TN
Posts: 2,305
Likes: 0
Received 0 Likes
on
0 Posts
So are you still wondering what it is???
If so it was answered it is an EGR passage way, that goes up to the EGR valve that is on the top side of the center iron houseing.
And one of the only ways I can think to fix it right would be to take it to a engine machine shop. And have them put a new plug back in.
Or I'm sure you could get a cast iron plug cut out from any steel shop around you, and then have it welded into the hole. This way would probably be cheaper, but I'm not sure what the point of that plug is. So I don't know if I would do that one.
If so it was answered it is an EGR passage way, that goes up to the EGR valve that is on the top side of the center iron houseing.
And one of the only ways I can think to fix it right would be to take it to a engine machine shop. And have them put a new plug back in.
Or I'm sure you could get a cast iron plug cut out from any steel shop around you, and then have it welded into the hole. This way would probably be cheaper, but I'm not sure what the point of that plug is. So I don't know if I would do that one.
01-04-04, 07:56 PM
#15
Emerald Triangle for life
iTrader: (5)
Join Date: Jan 2002
Location: Fort Collins, CO
Posts: 552
Likes: 0
Received 0 Likes
on
0 Posts
I would strongly advise against welding it closed. However, if it still fits pretty snug, peening the center should force the edges of the disk into the hole tightly enough to keep it from coming loose for the life of the engine. Otherwise, get a new plug.
Thread
Thread Starter
Forum
Replies
Last Post
LongDuck
1st Generation Specific (1979-1985)
12
10-07-15 08:12 PM