I removed the exhaust system ( bothsides) on my 1985 454 crusader port side engine to have them boiledout because they was clogged solid. It was so bad that I couldn'tget the individual pieces apart so I took the whole assemblies (leftand right side) out in one section right up to the rubber hose that'sabout 4 inches long. If I had been able to get it all apart Iwouldn't be asking this because I would have noticed how the gasketswere situated and aligned. The rad shop that finally got it apart,didn't think to make a note of how the gaskets were placed. I founda diagram on line but it's pretty blurry. But it looks to me like itgoes as follows. Btw it appears from the diagrams, that I have theearly style of exhaust manifold and I have an 8 inch riser.
Ok so after the exhaust manifold -96108 3 hole gasket - 97295 water outlet adapter - 96108 3 holegasket - 97296 water block off stainless steel shim - 96108 3 holegasket - 97169 8 inch riser - 96562 one hole gasket - 97386 90 degreeelbow – Then that 4 inch rubber hose I mentioned and I believe thatnumber is 22221 and after that another cast elbow and then back tofour inch rubber hose and out into the ocean.
So one question is, since there are 4fresh water cooling passage openings on the exhaust casting and only3 passage holes on the 96108 gaskets, ( not really holes but morelike arched rectangular openings. If you google these part numbersyou'll see the gaskets and the cast exhaust sections.) whichhole/opening gets blocked off and why? What's the point? Should Iassume that it is the bottom one that is blocked off? It sort oflooks like it's that way from the blurry diagram. Next question is96562 gasket has only one passage hole. Should I assume that thehole or opening is on the top? Again it sort of looks like that inthe diagram.
Now I start applying logic and nothingmakes sense. Since there is the stainless steel water block off shimbetween the water outlet adapter and the 8 inch riser, and this shimdoesn't have any holes in it, why bother having any holes at all onthe gaskets on both sides of that SS shim? (It's apparent that theSS shim is separating the salt water system from the fresh watersystem.) Also I don't understand why there is only one hole/openingin the last gasket just before the last 90 degree elbow which is justbefore the rubber section? The 8 inch riser has 4 passages and sodoes the 90 degree elbow on the other side of that gasket that onlyhas one hole/opening. What's the point of only having onehole/opening in the gasket? I don't get it?? I don't evenunderstand why the other gaskets have only 3 holes/openings. Why not4? It's not like the chamber around the exhaust fume chamber areseparate individual chambers. It's all one external passage foreither salt or fresh water to flow though. So the more flow rate thebetter cooling right? So it just doesn't make any sense at all tohave anything less than 4 holes/openings in all the gaskets. Exceptthe two gaskets on either side of the SS shim and they shouldn't haveany holes/openings in them really.
I understand that the exhaust manifoldand the water outlet adapter are circulating fresh water in thepassages around the exhaust fumes. The fresh water enters at theforward end of the exhaust manifold by the one and a quarter inchhose, then travels through the outside passage, then goes into thewater outlet adapter and then from there it goes to the heatexchanger through a one and a quarter inch rubber hose? In aseparate system, (even though it looks like it's all one system), the8 inch riser is ejecting the warm salt water which comes in throughthe one and a quarter inch rubber hose from the heat exchanger, goingthrough the 8 inch riser via the external passage and then when thesalt water gets to the 90 degree elbow its blended and mixes with theexhaust fumes and is sent out the rubber exhaust system back into theocean?
One additional question. Do I reallyneed to use the dedicated gaskets? Can't I just make them out of thesame gasket material I got from the auto parts store that I used whenI made my thermostat housing gaskets?
Also I'm guessing that I would putabout 20 ft. lbs. torque on all the fastening bolts holding the exhaust sections together and about 25 ft. lbs. on the exhaust manifold boltsgoing into the block. Correct?
Thanks for any and all suggestions orfeedback.
Cheers
Ok so after the exhaust manifold -96108 3 hole gasket - 97295 water outlet adapter - 96108 3 holegasket - 97296 water block off stainless steel shim - 96108 3 holegasket - 97169 8 inch riser - 96562 one hole gasket - 97386 90 degreeelbow – Then that 4 inch rubber hose I mentioned and I believe thatnumber is 22221 and after that another cast elbow and then back tofour inch rubber hose and out into the ocean.
So one question is, since there are 4fresh water cooling passage openings on the exhaust casting and only3 passage holes on the 96108 gaskets, ( not really holes but morelike arched rectangular openings. If you google these part numbersyou'll see the gaskets and the cast exhaust sections.) whichhole/opening gets blocked off and why? What's the point? Should Iassume that it is the bottom one that is blocked off? It sort oflooks like it's that way from the blurry diagram. Next question is96562 gasket has only one passage hole. Should I assume that thehole or opening is on the top? Again it sort of looks like that inthe diagram.
Now I start applying logic and nothingmakes sense. Since there is the stainless steel water block off shimbetween the water outlet adapter and the 8 inch riser, and this shimdoesn't have any holes in it, why bother having any holes at all onthe gaskets on both sides of that SS shim? (It's apparent that theSS shim is separating the salt water system from the fresh watersystem.) Also I don't understand why there is only one hole/openingin the last gasket just before the last 90 degree elbow which is justbefore the rubber section? The 8 inch riser has 4 passages and sodoes the 90 degree elbow on the other side of that gasket that onlyhas one hole/opening. What's the point of only having onehole/opening in the gasket? I don't get it?? I don't evenunderstand why the other gaskets have only 3 holes/openings. Why not4? It's not like the chamber around the exhaust fume chamber areseparate individual chambers. It's all one external passage foreither salt or fresh water to flow though. So the more flow rate thebetter cooling right? So it just doesn't make any sense at all tohave anything less than 4 holes/openings in all the gaskets. Exceptthe two gaskets on either side of the SS shim and they shouldn't haveany holes/openings in them really.
I understand that the exhaust manifoldand the water outlet adapter are circulating fresh water in thepassages around the exhaust fumes. The fresh water enters at theforward end of the exhaust manifold by the one and a quarter inchhose, then travels through the outside passage, then goes into thewater outlet adapter and then from there it goes to the heatexchanger through a one and a quarter inch rubber hose? In aseparate system, (even though it looks like it's all one system), the8 inch riser is ejecting the warm salt water which comes in throughthe one and a quarter inch rubber hose from the heat exchanger, goingthrough the 8 inch riser via the external passage and then when thesalt water gets to the 90 degree elbow its blended and mixes with theexhaust fumes and is sent out the rubber exhaust system back into theocean?
One additional question. Do I reallyneed to use the dedicated gaskets? Can't I just make them out of thesame gasket material I got from the auto parts store that I used whenI made my thermostat housing gaskets?
Also I'm guessing that I would putabout 20 ft. lbs. torque on all the fastening bolts holding the exhaust sections together and about 25 ft. lbs. on the exhaust manifold boltsgoing into the block. Correct?
Thanks for any and all suggestions orfeedback.
Cheers