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#830936 - Wed Feb 29 2012 04:25 PM Re: Leaking front main seal (I think) [Re: Denny Graham]  
cmayna  Offline
Shop Shark
Joined: Jan 2002
Posts: 2,121
Menlo Park, Ca
Sounds like something I might consider adding to my tool chest as well.



Craig's '50 Chevy 3100 5 window
My truck
If I'm not working on my truck, I'm fishing with the wife or smoking Salmon.


#831258 - Thu Mar 01 2012 03:30 PM Re: Leaking front main seal (I think) [Re: cmayna]  
DMGfifty  Offline
Shop Shark
Joined: Aug 2011
Posts: 785
Oregon Coast
I purchased a basic kit from napa. I think it was about $75 and included several bottles of dye (different for coolant, oil and even freon) a small black light and cleaner. I'll check when I get home and include a pic.


David Gilmore
Stovebolt Pictures
Paint progress
____________________________
1950 Chevy 3600

#831262 - Thu Mar 01 2012 03:49 PM Re: Leaking front main seal (I think) [Re: DMGfifty]  
cmayna  Offline
Shop Shark
Joined: Jan 2002
Posts: 2,121
Menlo Park, Ca
Look at the bottom of the following Amazon link. Making a test kit looks pretty inexpensive. If you uncheck the coolant dye, a light and oil dye = $44.77 + postage.

http://www.amazon.com/Tracer-Products-TP34000601-Fluorescent-Detection/dp/B000JFHNTM


Craig's '50 Chevy 3100 5 window
My truck
If I'm not working on my truck, I'm fishing with the wife or smoking Salmon.

#834766 - Tue Mar 13 2012 03:22 AM Re: Leaking front main seal (I think) [Re: cmayna]  
joeflanagan  Offline
Shop Shark
Joined: Sep 2011
Posts: 728
Alexandria, VA
Cleaned the area up and ran the engine and watched to see where the oil is coming from. It's definitely coming from behind the plate that goes around the crank and cam gears (timing plate?). Anyway, it's the plate that mounts directly to the block behind the timing chain cover. If I had a groove worn on the harmonic balancer, would that be where oil would start showing up? Is a speedy sleeve my best option here?


1956 Chevy 3200

#840513 - Mon Apr 02 2012 01:49 AM Re: Leaking front main seal (I think) [Re: joeflanagan]  
joeflanagan  Offline
Shop Shark
Joined: Sep 2011
Posts: 728
Alexandria, VA
I finally got around to this today. I pulled the grill and the radiator and pulled the harmonic balancer. There is a decent groove in it and I installed a speedy sleeve, but I don't think that's where my leak is coming from.
I did a little research on the forum here and I think the culprit is the gasket that goes behind the front plate and specifically, the part that goes against the front main bearing cap. It seems to me if it were the balancer, oil would be coming out from the seal in the timing chain cover. But it's not. It's coming from behind the plate behind the timing chain cover. I suppose it could be the oil pan gasket, but that is new and I don't believe I boogered that up.
So tomorrow I'm dropping the oil pan, removing the main bearing cap, and taking a look.


1956 Chevy 3200

#840678 - Mon Apr 02 2012 08:30 PM Re: Leaking front main seal (I think) [Re: joeflanagan]  
ApacheFiend  Offline
Shop Shark
Joined: Dec 2005
Posts: 476
Dallas, TX
Joe-

I had the same issue with my 235. Since I needed to do some other things I pulled the engine and put it on a stand and took it apart. My front leak was being caused by the gasket behind the timing plate being broken. It was broken right where the plate makes contact with the front main bearing.

So there I found my answer....only after two pan gasket changes, speedi-sleave install and a broken thumb later I fixed the front leak. My memory wants to say that some one else had this issue not long ago and was able to fix it by dropping the pan and removing the front bearing cap to fix the gasket with some permatex or something.


58' 3200 235 3-speed/OD

1958 Chevrolet 3200

#840689 - Mon Apr 02 2012 08:56 PM Re: Leaking front main seal (I think) [Re: ApacheFiend]  
CASO  Offline
Shop Shark
Joined: Jun 2011
Posts: 2,007
Warrenton, Oregon
Could this one reason some have chosen to reverse and tap out those two bolts through the main cap so the timing cover can be removed without dropping the pan?


Give me ambiguity
or give me something else

#840711 - Mon Apr 02 2012 10:24 PM Re: Leaking front main seal (I think) [Re: CASO]  
joeflanagan  Offline
Shop Shark
Joined: Sep 2011
Posts: 728
Alexandria, VA
Remember when I said I didn't believe I boogered up the oil pan gasket on installation? Well now I believe. Because I did.
The front rubber end gasket was half off the rail. I probably knocked it off when I installed the pan. I had set it in some black RTV and the way it dried, you can tell that half the rubber gasket was never even in the cement. And some of the cement never got crushed. It hardened just the way I put it down.
Gonna fix everything up, put it all back together, and see what happens.


1956 Chevy 3200

#840853 - Tue Apr 03 2012 01:53 PM Re: Leaking front main seal (I think) [Re: joeflanagan]  
don stocker  Offline
Shop Shark
Joined: Nov 2006
Posts: 2,693
osceola, wi
The RTV doesn't work well to hold things in place, its more to fill a small void. Get an adhesive to hold things in place. Do a search and you'll see that many opinions are available as to which works best. Best advise is to have things clean and oil free before you apply any product to hold a gasket in place.


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