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Re: OIl leak after timing chain replacement [Re: Brian894X4] #775683 12/30/06 12:02 AM
Joined: Oct 2005
Posts: 1,287
4WD22R Offline
Body Damage is Cool
Quote
Quote
I just replaced my timing chain, oil pan gasket, timing chain gasket, and the front crankcase seal. The problem is I'm now getting a sporadic oil leak from under the pulley. It looks like the front seal is leaking but I'm not sure why. It's leaked about 1 qt in the last 600 miles or so. Anybody got any ideas? <img src="/forums/images/graemlins/scared.gif" alt="" />


You didn't mention anything about pulling the head and replacing the head gasket...so I assume you didn't?

If not, and assuming it's not the front oil seal, then that's the problem. The headgasket seals the top of the timing cover with the bottom of the head. In some cases, you can get away with not removing the head if you RTV up this area, since it's a low pressure area, but otherwise you'll have a slow leak here.

I've had one there for years after I did the timing chain job the "easy" way. After it leaked and I pulled it apart again to fix it, I really bungled the headgasket, so I just said screw it and cut off that part of the headgasket (hate to admit that) then a RTV'd the crud out of it and have been living with a slow leak ever since.

<img src="/forums/images/graemlins/notooth.gif" alt="" />


One of these days I'll do something about it. But I say, if it ain't broke, don't fix it. That's why my truck is completely stock. <img src="/forums/images/graemlins/smile.gif" alt="" />


I got the same leak lol, it just makes the front of my motor nice and clean lmao.


-1986 TOYOTA
22R
ZUK coil rear
Torqued T-Bars
Marlin HD clutch

Newly rebuilt!! Runnin' like a champ!

AZTTORA #492
TLCA member

"I hear there's rumors on the Internets that we're going to have a draft."
--George W. Bush
From the Off-Road World
Re: OIl leak after timing chain replacement [Re: Brian894X4] #775684 12/30/06 12:16 AM
Joined: Jan 2006
Posts: 326
TimsToyo Offline OP
Mudrunner
Quote
Quote
I just replaced my timing chain, oil pan gasket, timing chain gasket, and the front crankcase seal. The problem is I'm now getting a sporadic oil leak from under the pulley. It looks like the front seal is leaking but I'm not sure why. It's leaked about 1 qt in the last 600 miles or so. Anybody got any ideas? <img src="/forums/images/graemlins/scared.gif" alt="" />


You didn't mention anything about pulling the head and replacing the head gasket...so I assume you didn't?

If not, and assuming it's not the front oil seal, then that's the problem. The headgasket seals the top of the timing cover with the bottom of the head. In some cases, you can get away with not removing the head if you RTV up this area, since it's a low pressure area, but otherwise you'll have a slow leak here.

I've had one there for years after I did the timing chain job the "easy" way. After it leaked and I pulled it apart again to fix it, I really bungled the headgasket, so I just said screw it and cut off that part of the headgasket (hate to admit that) then a RTV'd the crud out of it and have been living with a slow leak ever since.

<img src="/forums/images/graemlins/notooth.gif" alt="" />


One of these days I'll do something about it. But I say, if it ain't broke, don't fix it. That's why my truck is completely stock. <img src="/forums/images/graemlins/smile.gif" alt="" />
Brian, no I didn't remove the head but I did use some RTV and it doesn't appear to be leaking from there.

That's what's so weird about this leak. Before the timing chain swap it leaked a little around the oil pan but didn't leak at all around the timing chain cover. So I know it was something I did or didn't do.


'86 Toyo 4wd
'04 600RR
Re: OIl leak after timing chain replacement [Re: casper3t] #775685 12/30/06 12:33 AM
Joined: Aug 2005
Posts: 479
bloodbath4runner Offline
Mudrunner
Quote
it is the one underneath the timing markers

Noticed I'm leaking down there as well. Funny, I may have missed it, but I didn't see anything in the either the FSM or the write-ups about sealing one of those bolts. I could've missed it, though.


You know you're in for a rough night at sea when the barometer does this:
Re: OIl leak after timing chain replacement [Re: bloodbath4runner] #775686 12/30/06 01:46 AM
Joined: Sep 2003
Posts: 1,856
CJM Offline
Body Damage is Cool
yep .. sounds like you need a speedy sleeve .

seal wears a groove (over time) into the crank pully .. just needs to be refreshed .

[Linked Image]

[Linked Image]


86 4x4 , fiberglass bed , 1/2 doors , hood, etc..
84 Custom 2WD 400HP supra suspension , full frame
83 Trekker SR5
NEW Trekker forum
Re: OIl leak after timing chain replacement [Re: CJM] #775687 01/05/07 06:36 AM
Joined: Jan 2007
Posts: 18
Z
zacaroo Offline
Need a Spot
new to the forum, but owned and worked on many toyota 22r's. I once did a timing job (the easy way, as you all call it) on my 87 4runner and had the same problem. the leak ended up being the front main seal. there are little "fins" on the inside of the seal and one had a small rip in it, maybe I did it, maybe it was like that, who knows, but it leaked a fair amount of oil and flung it all over since it was behind the main pully. might give that seal another look, you will have to take off the oil pump again as i remember. hope that helps

for the record there is an even easier way to change that timing chain and guides if you all have not found. if you modify a wrench with a grinder and a torch you can do the whole thing with out taking off the timing cover at all! just the valve cover and oil pump, if you have done it you know it takes some steady hands, head lamp, and a few curse words as well but you dont run the risk of messing up the head gasket.


00 wrangler
85 truck, 22r, 4x4
06 KLR650
clean it only if you plan on working on it!
Re: OIl leak after timing chain replacement [Re: zacaroo] #775688 01/06/07 04:13 AM
Joined: Aug 2003
Posts: 480
MAC Offline
Mudrunner
"for the record there is an even easier way to change that timing chain and guides if you all have not found. if you modify a wrench with a grinder and a torch you can do the whole thing with out taking off the timing cover at all! just the valve cover and oil pump, if you have done it you know it takes some steady hands, head lamp, and a few curse words as well but you dont run the risk of messing up the head gasket. "

zacarro: can you give us some details ? never heard of this before...
i'm sure it will interest many here.

Re: OIl leak after timing chain replacement [Re: MAC] #775689 01/06/07 12:18 PM
Joined: Aug 2001
Posts: 2,941
DRTDEVL Offline
J
Roll Me Over
*****
I am sitting here trying to figure out how the chain can get past the crankshaft without damaging it.

Everything else, I can figure out.

I would still want to drop the pan, and clean the debris out... And the tools used would DEFINITELY have to be magnetized.



Probably easier in the end to remove the cover.


"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy

Proud owner of an 88 Montero (with a blown engine).
Re: OIl leak after timing chain replacement [Re: DRTDEVL] #775690 01/07/07 03:39 AM
Joined: Aug 2003
Posts: 480
MAC Offline
Mudrunner
so it sounds it may be possible to change the tensioner without pulling the cover?

Re: OIl leak after timing chain replacement [Re: MAC] #775691 01/08/07 08:26 PM
Joined: Jan 2006
Posts: 326
TimsToyo Offline OP
Mudrunner
I would NOT leave that mess in the oil pan! Not after the pieces I pulled out of that motor.

But thanks for confirming my suspicions zacaroo! <img src="/forums/images/graemlins/kewl.gif" alt="" />


'86 Toyo 4wd
'04 600RR
Re: OIl leak after timing chain replacement [Re: TimsToyo] #775692 01/09/07 03:25 PM
Joined: Jan 2007
Posts: 18
Z
zacaroo Offline
Need a Spot
yes the mess would be a problem. this type of fix only works if you have not let it get to the point where you have a big mess or need to fill weld a hole in your timing cover. when i did my first one i had to pull the cover because the chain wore a little hole through the cover and oil and water mixed. now i know what to look and listen for... my uncle is the one who came up with the idea. he has now done a few jobs with out taking off the cover. by bending a couple of wrenches and grinding them thinner he has made a set of tools for getting in the small space. doing this a few times he has got kinda good at it. This way thought is more for those who want to get back on the road fast and dont care too much about a few frags of plastic that may not have made it out (in my opinion). He does this for customers that can't afford the full blown take down. i personaly would pull the cover and get a good look at it if i have to do it again and have the time. but the ones that he did with his modified tools are still running and doing fine. the first one he did almost 10 years ago! I'm not sure if this would work for a double chain though, seems like that may be harder to get out with the limited space. has not come up though, maybe someone else can figure that one out. <img src="/forums/images/graemlins/confused.gif" alt="" />


00 wrangler
85 truck, 22r, 4x4
06 KLR650
clean it only if you plan on working on it!
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