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Author Topic:   SBC
eaton89
Dirt Freak

Total posts: 268
posted March 14, 2005 08:39 PM  
Ok , how about some advice on sealing up a sbc. I have built lots of stock motors for daily drivers. Now I have built a few racing motors. Nothing wild or very expensive. But when you turn these thing 7000 rpms it seems like they spring leaks everywhere. Lets here how some of you seal up a motor. Mainly the oil pan, valve covers and what you guys use on your intake gaskets other than the gasket. I have lots of issues with valve covers and finaly bought some aluminium covers for this year hope that cure that part but when you take them off after ever race their is surly a trick. I also always wory about the intake. We are covering these mtors in mud and then washing them every race and I get worried the constant heat water and mud may cause a problem if your not using something on the gasket. I usually use the sticky stuff to keep the gasket in place wile putting the intake on. I would just like to hear what the rest of you do. Maybe I worry to much about some of this but I dont like the smoking grease ball that seems to happen from time to time.

Rat Trap
Dirt Maniac

Total posts: 129
posted March 14, 2005 10:12 PM  
We had problems the start of last year with the valve covers. We started using a gasket we got at garnetts auto supply that are probably 3 times thicker of a gasket. Haven't had an issue with the intake, knock on wood.
Now the oil pan, right at the front is a different story. We just took the pan off last week to replace the gasket that was leaking, take the car out sunday and the dang thing started leaking again. Looks like we may have to pull the timing cover also. Is this a common problem? We had no problem with it last year, but we did some motor work this year and are turning it a few more rpms.

iowatoolman
Dirt Freak

Total posts: 369
posted March 15, 2005 12:18 AM  
i don't know about you guys but i ran the fel-pro blue (rubber) gaskets on the valve covers and oil pan (1 piece) and never had a leak
yes they are more expensive but they are reusable (hence saving money later)

try that

drive hard or drive home

speedy2
Dirt Full Roller

Total posts: 54
posted March 15, 2005 05:05 AM  
Ive never had problems with the valve cover gaskets but as far as the intake and oil pan. after tightening the pan i put a bead of silicone around edge of pan between the pan and the block from one side to the other on both ends.(Thats using the gaskets that come in the rebuild kits)Ive never used the blue rubber ones so i dont have any input on those. The intake I dont even use the gasket that comes with the kit. I just put a thick bead of silcone that goes from one intake gasket to the other on both ends and then set the intake on and bolted in. then let set over nite before starting motor. I also put silicone around the freeze plug behind cam in back of motor just in case its not quite sealed up either. Hope this helps. Its never failed me once. Good luck. DAVE

[This message has been edited by speedy2 (edited March 15, 2005).]

NJantz
Dirt Forum Champ
Total posts: 755
posted March 15, 2005 05:47 AM  
Speedway Motors sells a real nice reusable valve cover gasket. It's thick, has a steel center and the outside is neoprene rubber. I think they are about 10 bucks. I've never had a leak even with el'cheapo stamped steel valve covers.

Now oil pans are a problem. I've tried everything and no luck yet. I'm convinced it's just the nature of the beast.


TEAMPCR
Dirt Freak

Total posts: 238
posted March 15, 2005 06:38 AM  
The one piece blue silicone pan gasket only fits the newer style one piece rear main seal blocks, doesn't it. That's all I've ever seen. It does work well.
Now, on the intake gasket, take the rubber pieces for the front and rear out of the box and throw them in the trash. Use a bead of the red silicone on the front and rear.
On the valve covers, engines from the factory didn't use an actual gasket(or so I've heard) instead, they used the red silicone.
I use the extra thick cork with the steel shim sandwiched in the middle for the valve covers. works for me. Dave

jeffsntx
Dirt Roller

Total posts: 5
posted March 15, 2005 08:12 AM  
As for the valve cover gaskets - go to your local Napa store and buy part # VS38110H. they are VERY thick and I use 1 set a season. Also use the long valve cover holddowns to distribute the torque of the bolt. I personally have never had any problem with oil pan gaskets leaking. I use aviation cement on both sides of the gasket and end seals and have never had a problem. I also throw away the intake end seals and use ultra black silicone. I also use a very thin layer of silicone around the water ports on the heads and intake before I set the intake on. Hope this helps.

stockcar5
Dirt Forum Champ
Total posts: 578
posted March 15, 2005 10:55 AM  
to help seal the oil pan i use a thin coating of some stuff called "right stuff" on each gasket. its a really nice tacky gray colored gasket maker...stuff works awesome. you can get it at bumper to bumper. i also use it on the rubber seal ends and apply a bead between the timing cover and oil pan. works great and doesnt leak. oil pan studs also seam to help alot.

------------------
www.geocities.com/dirtstockcar5

iowatoolman
Dirt Freak

Total posts: 369
posted March 15, 2005 06:23 PM  
no the one piece oilpan seal comes in different part #'s to fit lh dipstick rh dipstick and one piece rear seal also
quote:
Originally posted by TEAMPCR:
The one piece blue silicone pan gasket only fits the newer style one piece rear main seal blocks, doesn't it. That's all I've ever seen. It does work well.
Now, on the intake gasket, take the rubber pieces for the front and rear out of the box and throw them in the trash. Use a bead of the red silicone on the front and rear.
On the valve covers, engines from the factory didn't use an actual gasket(or so I've heard) instead, they used the red silicone.
I use the extra thick cork with the steel shim sandwiched in the middle for the valve covers. works for me. Dave


ryan
Dirt Forum Champ
Total posts: 776
posted March 15, 2005 07:26 PM  
For the valvecover gaskets I just use the ones that come with the gasket set and I use a some "Indian Head" from Napa its not very politically corect but it works. Just apply it to the surface between the valvecover and the gasket and it will stick on the valvecover all year long. You just need to make sure your v.c sits tight on your head I have had to grind them down before. On intakes I put the silicone on the ends and around the water ports, around the actual intake ports I use yellow weather stip adhesive on the head and intake side and it works great. On the pan after its assembled we smear on a bunch on the rear of the pan for extra insurance.

eaton89
Dirt Freak

Total posts: 268
posted March 15, 2005 07:46 PM  
Sounds like most of us do the same things. I have always used silicone around the water ports on the intake as well and I use to put the rubber seals on the ends of the intake but then I bought a GM crate motor and it said throw them away so I have been doing that for awhile. Has any one used urathane like what they put windows in a car with for valve covers or oil pans?

eaton89
Dirt Freak

Total posts: 268
posted March 17, 2005 08:28 PM  
btt

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