Timing cover cam seal at autozone

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Beemer

Beemer

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I got in a hurry, if you need one quick the autozone part number is 2027
 
$4.29 at Oreilly. It is a National part number. Could be Mexico
 
Love it.
Timing cover cam seal at autozone
 
I'm disappointed with camshaft seal i recently fitted from AN as its leaking after only 50miles..
I'm used to fitting seals BTW and using a purpose make installer fitting the seal the correct way around, suitably lubricated and using a seal guide on cover install .... but it still leaked
And with the seal installed from inside its a right ball ache to replace it :mad:
 
olympus said:
I'm disappointed with camshaft seal i recently fitted from AN as its leaking after only 50miles..
I'm used to fitting seals BTW and using a purpose make installer fitting the seal the correct way around, suitably lubricated and using a seal guide on cover install .... but it still leaked
And with the seal installed from inside its a right ball ache to replace it :mad:
Click to expand...
Could have been worse, Malcolm..... Could've been an ache in both balls!!
 
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olympus said:
I'm disappointed with camshaft seal i recently fitted from AN as its leaking after only 50miles..
I'm used to fitting seals BTW and using a purpose make installer fitting the seal the correct way around, suitably lubricated and using a seal guide on cover install .... but it still leaked
And with the seal installed from inside its a right ball ache to replace it :mad:
Click to expand...
I'm not giving advice, just babbling. Might check that you're getting good crank case pressure relief. I've reused an old cam seal using the install tool and no leaks. Not recommending it, but I have. My motor breaths off a CNW (Comstock) breather on the case side magneto hole rear of the timing cavity, so there is no significant amount of crank case pressure in the timing cavity. Could be the only reason my old cam seal does not leak. I only mention it because I'm not sure if oil pressure alone would be an issue at that location. I'm thinking the timing gears and chain are splash lubed. Someone will be along shortly to correct me if I am wrong about all of that.
 
Schwany said:
I'm not giving advice, just babbling. Might check that you're getting good crank case pressure relief. I've reused an old cam seal using the install tool and no leaks. Not recommending it, but I have. My motor breaths off a CNW (Comstock) breather on the case side magneto hole rear of the timing cavity, so there is no significant amount of crank case pressure in the timing cavity. Could be the only reason my old cam seal does not leak. I only mention it because I'm not sure if oil pressure alone would be an issue at that location. I'm thinking the timing gears and chain are splash lubed. Someone will be along shortly to correct me if I am wrong about all of that.
Click to expand...
A very valid point to which i checked before removing the cover
The motor is only 70miles from a full nut & bolt rebuild and has the HNW reed breather fitted onto the original (72) lower crankcase breather assembly. (innards removed)
As part of the rebuild i read at length the views on fitting the breather here & that the holes between timing chest & crankcase should be plugged... which i did
Along with lowering the oil return drilling from the timing chest into the crankcase.
With the engine running and removed the timing chain inspection plug, placing your finger over the hole there is no internal pressure pushing out..... in fact quite the opposite you can feel a slight vacuum being created so I'm quote comfortable its not oil being pushed past the seal

I know there is a view that the breather is best placed into the timing chest, but if pressure is being created its inside the crankcase, i believe the breather should be there.
With lowering the oil level there should only be a fine mist within the timing chest, yes overpressure oil from the pump is vented into the chest but the new 5/16 hole drilled through (same size as the original) should be more than enough to allow the oil to pass into the crankcase???? ...unless other no different.
The only other points to consider are
Dodgy seal
Camshaft bush worn to excess
As we know there are two things that a lip type seal cant take is excess pressure & being constantly loaded...worn bearings.
Know i know the cam bushes are sound as were checked on re build, but i cheeked them again when the cover and chain were removed

I have to conclude its a dodgy seal and nothing more
 
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olympus said:
A very valid point to which i checked before removing the cover
The motor is only 70miles from a full nut & bolt rebuild and has the HNW reed breather fitted onto the original (72) lower crankcase breather assembly. (innards removed)
As part of the rebuild i read at length the views on fitting the breather here & that the holes between timing chest & crankcase should be plugged... which i did
Along with lowering the oil return drilling from the timing chest into the crankcase.
With the engine running and removed the timing chain inspection plug, placing your finger over the hole there is no internal pressure pushing out..... in fact quite the opposite you can feel a slight vacuum being created so I'm quote comfortable its not oil being pushed past the seal

I know there is a view that the breather is best placed into the timing chest, but if pressure is being created its inside the crankcase, i believe the breather should be there.
With lowering the oil level there should only be a fine mist within the timing chest, yes overpressure oil from the pump is vented into the chest but the new 5/16 hole drilled through (same size as the original) should be more than enough to allow the oil to pass into the crankcase???? ...unless other no different.
The only other points to consider are
Dodgy seal
Camshaft bush worn to excess
As we know there are two things that a lip type seal cant take is excess pressure & being constantly loaded...worn bearings.
Know i know the cam bushes are sound as were checked on re build, but i cheeked them again when the cover and chain were removed

I have to conclude its a dodgy seal and nothing more
Click to expand...
Further to the above i have decided to drill and tap the timing cover inspection plug to drill & tap it to accept a M5 nipple so i can connect to a vacuum /pressure "U" tube (manometer) to give me a more scientific indication if there is indeed excess pressure or a vacuum being created
 
One day, long ago I came across a post where someone made a simple tool that allows for the install of the timing cover without damaging this seal.
Anybody out there in forum world have the link?
Thanks
 
Mofosheee said:
One day, long ago I came across a post where someone made a simple tool that allows for the install of the timing cover without damaging this seal.
Anybody out there in forum world have the link?
Thanks
Click to expand...
Years ago, while too poor for special tools and still a smoker, I would take the cellophane from a pack of cigarettes, wipe both sides with a little grease and wrap it around the end of the cam with about 3/4" on the cam and about 1" sticking out like a cone. Then just slide the cover on over the cellophane and pull the cellophane out. Just as fast as using the tool, but a little more fiddley.
 
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