To anyone I suggested using an RTV coated bolt in the dipstick hole..............

D.Hearne · Feb 10, 2008

That **** don't work when you don't run a PCV system. Did this on the 331 in my 77 Comet. Been battling an oil leak at front and rear of the pan. Changed the Felpro 1 pc gasket yesterday to the early pan 1 pc gasket. Got it all buttoned back up, let the extra RTV I put on the pan radius's cure overnight. Refilled the crankcase this afternoon, started engine. Watched for more leaks. No leaks........good. Time for test drive.................. Get down the road about 5 miles from the house, let her rip coming out of a curve. Smelled oil burnin'...........Looked in the mirror..................Looked like the Space Shuttle took off, horizontally. Oil pressure's OK , turn around, drive back to the house, up on the ramps. Get under the car, oil's dripping like rain under the car It's coming from the now open hole where I put that RTV coated bolt...........but the bolt's gone.................. Did something similar but used glue coated bolt instead. Also rigged a PCV system to keep the pressure from doing that again................... No leaks now.

Fast63 · Feb 10, 2008

LOL, well sometimes the best is learn from our mistakes. I just put RTV and nothing more over the hole, so I hope that will be enough. I will be running a PCV system though.

skywalker · Feb 10, 2008

*cough* In our helicopter maintenance pubs, RTV wil sometimes be called for...but never where a petrolem product is involved, then we use a similar, stickier, smellier substance we call 8802. Reason: petroleum breaks down RTV.

D.Hearne · Feb 10, 2008

Sure don't break down the stuff I use. Permatex Ultra Blue.

68EFIvert · Feb 11, 2008

D.Hearne said:
Sure don't break down the stuff I use. Permatex Ultra Blue.

I sure hope you are right because that is what is in my hole. I mean, what I used to plug the dipstick on my roller motor.

skywalker · Feb 11, 2008

68EFIvert said:
I sure hope you are right because that is what is in my hole. I mean, what I used to plug the dipstick on my roller motor.

If it doesn't break it down, than it is by definition, not RTV.

red65 · Feb 11, 2008

Better solution - tap the dipstick hole using a 1/8NPT tap. The hole is a little oversize, but pipe thread tapers, so it will take a thread. Dab on a little Loctite, and thread in the brass or steel 1/8NPT plug of your choice. You'll never have to worry about it again.

skywalker · Feb 11, 2008

There are some oil resistant versions of loctite that would work also.

thehueypilot · Feb 11, 2008

red65 said:
Better solution - tap the dipstick hole using a 1/8NPT tap. The hole is a little oversize, but pipe thread tapers, so it will take a thread. Dab on a little Loctite, and thread in the brass or steel 1/8NPT plug of your choice. You'll never have to worry about it again.

Another solution is to do what Ford did and put a cup plug in the hole if it is not going to be used for the dip stick. They sell them at NAPA for about $1 under Clevite P/N 219-2185

Tim

DJCarbine · Feb 11, 2008

thehueypilot said:
Another solution is to do what Ford did and put a cup plug in the hole if it is not going to be used for the dip stick. They sell them at NAPA for about $1 under Clevite P/N 219-2185

Tim

Yup, when you buy a newer style timing cover they usually come with this part in the packaging for that purpose

skywalker · Feb 11, 2008

thehueypilot said:
Another solution is to do what Ford did and put a cup plug in the hole if it is not going to be used for the dip stick. They sell them at NAPA for about $1 under Clevite P/N 219-2185

Tim

You've prolly seen 8802...it's all over the 90 degree gbox on a huey.

jcode68 · Feb 11, 2008

I couldn't find a cap style plug at Napa or any other store, so I got a tapered cork at the hardware store, gave it a good coat of rtv and tapped it into the hole. No leaks since.

Decurion · Feb 11, 2008

This thread sounds like the first meeting of Hacks Anonymous!
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I used a dab of RTV on my falcon.

D.Hearne · Feb 11, 2008

Next time the motor's out, it'll get a threaded plug. Ain't no way that's going to happen til then.

68EFIvert · Feb 11, 2008

D.Hearne said:
Next time the motor's out, it'll get a threaded plug. Ain't no way that's going to happen til then.

+1 I don't know if you could do it while the engine is in the car.

mikethebike · Feb 11, 2008

Dumb 'ol me is still trying to understand why you would build an engine without a PCV system. I'm old enough to remember the debate over the 1st PCV systems and how the hot-rod crowd claimed it would cost hp. When they dynoed engines without and then with PCV the PCV engine always made more power. And used less oil. And since you were not trying to vent the crank case through a vent tube your oil stayed cleaner.

D.Hearne · Feb 11, 2008

68EFIvert said:
+1 I don't know if you could do it while the engine is in the car.

I KNOW it ain't gonna get done with the engine in place. There's room to reach up to the hole from under the car, even with the Hedman 4 into 1's. Just ain't no way to get a tap in there, much less screw a plug in afterward.

D.Hearne · Feb 11, 2008

mikethebike said:
Dumb 'ol me is still trying to understand why you would build an engine without a PCV system. I'm old enough to remember the debate over the 1st PCV systems and how the hot-rod crowd claimed it would cost hp. When they dynoed engines without and then with PCV the PCV engine always made more power. And used less oil. And since you were not trying to vent the crank case through a vent tube your oil stayed cleaner.

I didn't have a PCV originally with the 83-85 Stang valve covers, the baffles didn't survive the roller rocker clearancing, hence running a PCV valve with no baffle is a sure fire way to foul the spark plugs and drink quarts of oil in the process. I've since swapped covers to Moroso tall chrome steel (plain ones---no logo on these ) that have baffles. With the Stang covers, I had one open breather cap, the other had a 1/2 nipple that I routed a hose to the aircleaner, kinda hoped that would have been sufficient to vent the crank case. DIdn't happen though, I guess the 331's got a bit too much blow by at WOT for that to handle.I really wanted to keep the Stang covers as they pretty much matched the 3x2 air cleaner top. Maybe some day I'll get some baffles rigged in em.

mikethebike · Feb 11, 2008

skywalker said:
*cough* In our helicopter maintenance pubs, RTV wil sometimes be called for...but never where a petrolem product is involved, then we use a similar, stickier, smellier substance we call 8802. Reason: petroleum breaks down RTV.

My 1977 XLCH has never leaked a drop of oil from the lower cases and they are vertically split and sealed with orange high temp RTV.

mikethebike · Feb 11, 2008

D.Hearne said:
I didn't have a PCV originally with the 83-85 Stang valve covers, the baffles didn't survive the roller rocker clearancing, hence running a PCV valve with no baffle is a sure fire way to foul the spark plugs and drink quarts of oil in the process. I've since swapped covers to Moroso tall chrome steel (plain ones---no logo on these ) that have baffles. With the Stang covers, I had one open breather cap, the other had a 1/2 nipple that I routed a hose to the aircleaner, kinda hoped that would have been sufficient to vent the crank case. DIdn't happen though, I guess the 331's got a bit too much blow by at WOT for that to handle.I really wanted to keep the Stang covers as they pretty much matched the 3x2 air cleaner top. Maybe some day I'll get some baffles rigged in em.

No experience with those, but on the 65 I run Erson full roller, aluminum rockers and I put dye on them and rotated the engine with the covers hand tight. I then heated and ball-peaned the baffle to clear the rocker. I've actually won $150.00 over the years because some genius at a cruise-in will tell me I'm lying when I tell them I have full roller rockers. You should see the look on their faces when I pop the Cobra covers and ther are those nice aluminum rockers.

To anyone I suggested using an RTV coated bolt in the dipstick hole..............

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