Rear intake manifold leaking???
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Senior User
Joined: Oct 2006
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From: SE of Bennett Colorado
Rear intake manifold leaking???
89 F250, 7.5/460, C6 Auto, 4x4
Okay, so I've spent the last week or so replacing my rear seal (some days spent digging out from snow storms). The pan is still off, almost ready to go back on.
The original problem was oil pouring down the bell housing. I've since discovered through continued searches on FTE that this could be a rear intake manifold leak.
Are there any good threads (I've searched a few times with no luck) regarding the process of fixing the rear intake manifold? Should I leave my oil pan off? Should I leave my exhaust off? Etc, etc.
Rookie shade mechanic here, I gotta find out where the rear intake manifold is!
Okay, so I've spent the last week or so replacing my rear seal (some days spent digging out from snow storms). The pan is still off, almost ready to go back on.
The original problem was oil pouring down the bell housing. I've since discovered through continued searches on FTE that this could be a rear intake manifold leak.
Are there any good threads (I've searched a few times with no luck) regarding the process of fixing the rear intake manifold? Should I leave my oil pan off? Should I leave my exhaust off? Etc, etc.
Rookie shade mechanic here, I gotta find out where the rear intake manifold is!
Postmaster
Joined: Nov 2001
Posts: 3,351
Likes: 1
From: Escondido, CA
The rear of the intake is independant of pretty much everything but itself. The back of the intake is in line with the back of the valve covers but in front of the oil sending unit. You can pretty much see the oil sending unit from the top or the engine if memory serves me right. Now the likelyhood of the rear gasket suddenly crapping out dumping oil is pretty nill since there is no pressurized oil passages under the intake. However with that said, remember the oil pressure sending unit I was just writing about? Check to make sure that hasn't come apart, loosened, or leaking. The sending unit taps directly into a lifter oil passages at the top rear of the block.
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Senior User
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From: SE of Bennett Colorado
I'll check the sending unit 'area' once I get this project back together and the engine lowered. Realizing the oil pressure gauge is only a 'feature (previous owner put an aftermaket gauge on), I've been getting decent pressure when I have oil in it (I've been keeping quarts of oil in the truck at all times to feed its never ending hunger for more oil).
I bought this hoss a few months back knowing it was already leaking pretty bad. Since oil was gushing out the back of the pan 'area' between the pan and the bell housing and down the front of the transmission, I like many others before me I'm sure, dug into the rear seal. I'll have to put this hoss back together and perform another investigation if I still get the same leak. Hopefully I did the rear seal correctly, I'd hate to cause an additional unecessary problem.
Thanks for the tip.
I bought this hoss a few months back knowing it was already leaking pretty bad. Since oil was gushing out the back of the pan 'area' between the pan and the bell housing and down the front of the transmission, I like many others before me I'm sure, dug into the rear seal. I'll have to put this hoss back together and perform another investigation if I still get the same leak. Hopefully I did the rear seal correctly, I'd hate to cause an additional unecessary problem.
Thanks for the tip.
Postmaster
Joined: Nov 2001
Posts: 3,351
Likes: 1
From: Escondido, CA
Another area that could be leaking is a small 1/4" allen plug on the passenger side of the block just behind the head. Not likely since plugs are pipe threaded but it does give you something else to look at. Just what you wanted to do in the snow huh? Lay in it until you can't feel your butt cheeks.
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From: SE of Bennett Colorado
Fortunately I have a over-sized insulated three car garage. I have a great propane heater that helps a lot. I use the heater to take the nip off.
My tractor is running out of places to put the damn snow. Those old tractors sure don't turn on a dime so its hard to turn and dump without getting stuck.
I know as soon as I get the truck up and running again, and put the plow on it, there won't be a single snowflake falling for 12 more months.
I did some busy work on the truck today after I dug out AGAIN from the drifts created by wind over night:
PCV valve and new valve cover PCV grommet
New Ox sensor since I had the pipes off anyway.
Adjusted the steering box (will have to test once the truck is running)
Some engine/part cleaning
Flushed radiator since it was off (ohhh the sludge!)
Took off power steering hose that I split during engine rise (oops)
Took off an exhaust 'hose' leading to the C.C that was already split
Removed old C.C. (installing new high-flow C.C and Cat-back exhaust. muffler goes bye-bye)
Overall, it's a lot of work but its fun getting this hoss fixed up. I bought it several months ago knowing that it had not been maintained very well.
I Have to go the the parts store tomorrow and get replacement hoses, pipe clamps for the C.C., brake cleaner (love the stuff), penetrating oil, and you know, 'stuff'.
My tractor is running out of places to put the damn snow. Those old tractors sure don't turn on a dime so its hard to turn and dump without getting stuck.
I know as soon as I get the truck up and running again, and put the plow on it, there won't be a single snowflake falling for 12 more months.
I did some busy work on the truck today after I dug out AGAIN from the drifts created by wind over night:
PCV valve and new valve cover PCV grommet
New Ox sensor since I had the pipes off anyway.
Adjusted the steering box (will have to test once the truck is running)
Some engine/part cleaning
Flushed radiator since it was off (ohhh the sludge!)
Took off power steering hose that I split during engine rise (oops)
Took off an exhaust 'hose' leading to the C.C that was already split
Removed old C.C. (installing new high-flow C.C and Cat-back exhaust. muffler goes bye-bye)
Overall, it's a lot of work but its fun getting this hoss fixed up. I bought it several months ago knowing that it had not been maintained very well.
I Have to go the the parts store tomorrow and get replacement hoses, pipe clamps for the C.C., brake cleaner (love the stuff), penetrating oil, and you know, 'stuff'.
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Senior User
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From: SE of Bennett Colorado
Well, I got the old oil pan up today. A big step in this project after figuring out the new oil pan that was sent to me was TOO DEEP (9 quart?).
I thought I was doing a good thing by putting a new filter on, putting the oil pan plug in, and putting 6 quarts of new oil in right away. There I was, cleaning up tools, rags, etc and behold a pool of oil! Guess what I forgot? The dipstick tube! The tube wouldn't fit back in since the engine was still raised! It's amazing how fast an engine can be LOWERED isn’t it? I got the tube in pretty fast and everything looks good now oil pan wise.
I had a moment of greatness today while figuring out how to keep the hex shaft from the distributor in place while we (son and I) lifted the oil pump up to bolt it to the block. I wrapped a loop of a rubber band around the hex shaft, then hooked the other end to hose clamp screw at the front of the engine! I kept saying "we can't forget the rubber band, we can't forget the rubber band.." The shaft stayed in place, the pump went up (had to work the pump a bit to get the oil pump end of the shaft to fit into the pump) and we bolted it on. We both remembered to take the rubber band out before I bolted the pan back up. Whew.
Let's all join in the chant "hummmmm no leaks....hummmmmm no leaks..."
I thought I was doing a good thing by putting a new filter on, putting the oil pan plug in, and putting 6 quarts of new oil in right away. There I was, cleaning up tools, rags, etc and behold a pool of oil! Guess what I forgot? The dipstick tube! The tube wouldn't fit back in since the engine was still raised! It's amazing how fast an engine can be LOWERED isn’t it? I got the tube in pretty fast and everything looks good now oil pan wise.
I had a moment of greatness today while figuring out how to keep the hex shaft from the distributor in place while we (son and I) lifted the oil pump up to bolt it to the block. I wrapped a loop of a rubber band around the hex shaft, then hooked the other end to hose clamp screw at the front of the engine! I kept saying "we can't forget the rubber band, we can't forget the rubber band.." The shaft stayed in place, the pump went up (had to work the pump a bit to get the oil pump end of the shaft to fit into the pump) and we bolted it on. We both remembered to take the rubber band out before I bolted the pan back up. Whew.
Let's all join in the chant "hummmmm no leaks....hummmmmm no leaks..."
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