Join Date: Jun 2001
Location: 35.753983 N, 91.634603 W
Re: This is getting old, timing chain cover sealant.
Yes they're a pain in the butt..especially if it's in the car! I wonder, though, if it's possible that the coolant may be leaking between the bolt threads? I've seen this a time or two. The holes in the block are supposed to be "blind" holes (they should not go into water) but sometimes when someone changes the water pump, they use a bolt that is too long and it will push the back out of the hole....and in that case, they'll leak unless you seal the threads up. Believe me, I'm plenty guilty of doing this!! No, the block isn't ruined if that's what's happening. Best thing to do is to take a good look at all the holes in teh block and make sure they're all blind. If you have one or more that goes all the way back into the water jackets, get a tube of 3M weatherstrip glue and when you're assembling it, put a little "monkey snot" on the bolt, then slide it in. This stuff works great for sealing those pesky little leaks like that, as well as head studs and intake manifold bolts.
And yes, I usually use a little glue of some sorts to glue the gasket to the block. It usually sticks to the block but big deal. They'll scrape off pretty easily....especially if you use Edelbrock's gaska-cinch I think it's called.
One other thing that makes things easier is to REALLY watch the bottom of the cover gaskets where they meet the oil pan gasket 'ends'. That's a good place for a leak if you aren't real careful. I usually put the 'ends' on the pan first, then trim the cover gasket to fit on top of the pan gasket, and then use a little bit of RTV right where the cover gasket meets the pan gasket, and also where the pan gasket 'ends' meet the pan end seal at the timing cover. When I say a little RTV, I mean a LITTLE RTV. Too much is worse than none at all.
On top of that, just make sure everything is clean, no old gasket material, no oil residue and no coolant on the surfaces. If it ain't clean, the RTV will never stick to it therefore you just wasted your time.
Oh and do all the 5.0's have dowel pins in the cover? I can't ever remember seeing them on any of the ones I've had, but I don't remember looking that close either. I do know that they are a pain in the butt because you have to push the cover straight onto the block, which usually upsets the pan gaskets. I've only used pins a couple times...and if I ever had to take the cover off for a cam swap, etc, I threw them as far as I could!
Oh and this one's for riceharvester. I feel your pain! I did that same exact thing on a powerglide not 2 months ago. Blew the engine, bent the input shaft a little, so I pulled the trans apart to check it all out good (no other problems thankfully) and when I put the pump back in the case, I apparently left a small piece of the old pump gasket on the case...and yeah it leaked big time. But only when it was not running. It's still like that...haven't had the motivation to go out to the shop & pull it back out to fix the leak. I guess I need to get back to it. My motivation will be the thought of it finally leaking while running and me getting into my own trans oil at 130+. Not a nice thought.
GET OUT & VOTE THIS NOVEMBER!!
Last edited by mavman; 12-13-2007 at 06:47 PM.