Pulled LIM and found a .. hole?
05-07-08, 02:58 PM
#1
Pulled LIM and found a .. hole?
There is a hole, right below the two center ports on the LIM, on the block. There is no matching hole on the actual manifold, From the looks of it the manifold partially covers it... Umm.. just wondering if it's supposed to be like that..
I googled for pics but I have yet to find a picture that shows this hole.
I googled for pics but I have yet to find a picture that shows this hole.
Last edited by Hazard15301; 05-07-08 at 03:24 PM.
05-07-08, 03:29 PM
#2
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On a 86/87 non turbo car, that hole has a *Freeze plug* installed in it, to cap off that area. On a 86/87 non turbo, that area behind the freeze plug is air going from the exhaust to the EGR.
On a series five car, that hole is rectangular and the air behind that rectangular area is for the air from the air pump going to the exhaust ports. ON a series five there is no freeze plug. That area is covered by the intake manifold.
On a series five car, that hole is rectangular and the air behind that rectangular area is for the air from the air pump going to the exhaust ports. ON a series five there is no freeze plug. That area is covered by the intake manifold.
05-07-08, 03:32 PM
#3
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A Freeze plug goes over that area. The area behind the freeze plug is exhaust air going to the EGR on a series four non turbo engine.
Series four turbo and series five period, have a rectangular hole there and it's covered by the lower intake manifold. The area in the rectangular hole on series five is Port Air going to the exhaust ports from the ACV.
Series four turbo and series five period, have a rectangular hole there and it's covered by the lower intake manifold. The area in the rectangular hole on series five is Port Air going to the exhaust ports from the ACV.
05-07-08, 03:44 PM
#4
Well, it's an 88, and the LIM looks like it covers half of it. So I need to find a freeze plug thats the right diameter in like the next 2 hours lol.
I guess my next question is, what is the diameter of the plug? I tried getting my micrometer in there but i can't get an accurate reading with it.
I guess my next question is, what is the diameter of the plug? I tried getting my micrometer in there but i can't get an accurate reading with it.
Last edited by Hazard15301; 05-07-08 at 04:12 PM.
05-07-08, 06:37 PM
#5
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I meant 86-88 non turbo. Try something like 1.1 inch or 28mm.
The first reply flat disappeared, so I wrote the second one to replace it.
There's no real pressure behind that freeze plug to speak of.
The first reply flat disappeared, so I wrote the second one to replace it.
There's no real pressure behind that freeze plug to speak of.
05-08-08, 03:14 AM
#6
Ok good. I went to the parts store looking for a 20mm, because thats the only size I found when I searched, and they didn't have it. I got one of those rubber expanding ones, got halfway home and realized theres no way it would work. The nut on it would block the LIM. I can't for the life of me figure out why it was missing. Maybe I knocked it out somehow during the rebuild...
05-08-08, 07:37 AM
#7
I'd have a metal shop punch out a disk out of some steel and put it in there. Looks like the hole is a bit recessed, so the disk would not protrude, maybe.
As far as sealing it, not sure, because of the relatively high temps. I was thinking J.B. weld or the high-temp copper coloured Permatex sealant.
As far as sealing it, not sure, because of the relatively high temps. I was thinking J.B. weld or the high-temp copper coloured Permatex sealant.
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