Careful with RTV
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Topic author - Posts: 361
- Joined: Mon Jan 07, 2019 12:44 am
- First Name: Bob
- Last Name: Shirley
- Location: Atlanta Tx
- MTFCA Number: 29135
Careful with RTV
Bought a car with a engine knock. Pulled the inspection pan and sure enough number one was loose. Pulled the head, got the rod out, miked the crank and was very lucky. Pulled the transmission cover and to my surprise, it was not lint in the oil tube it was a piece of RTV. Looking at the inside of the motor someone had used way too black silicon, it squished out on the inside of all the mating surfaces, and some broke lose.
Just a heads up, a little go a long way. That stuff will clog things up!-
- Posts: 1464
- Joined: Tue Jan 08, 2019 12:22 am
- First Name: craig
- Last Name: leach
- * REQUIRED* Type and Year of Model Ts owned: 1919 Firetruck/1922 Speedster
- Location: Laveen Az
- MTFCA Number: 26647
Re: Careful with RTV
RTV is the best thing i know of for oil leaks when used in moderation, but I have pulled it out of oil pickups from Harleys to big cam Cummins. Its like alcohol Ok in moderation. Deadly if abused.
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- Posts: 308
- Joined: Mon Jan 14, 2019 4:48 pm
- First Name: Tommy
- Last Name: Coffey
- * REQUIRED* Type and Year of Model Ts owned: '21 Touring
- Location: western NC
Re: Careful with RTV
I managed an auto parts store in the 80s that had a full automotive machine shop. We took in a newly rebuilt (non-T) engine that had been built elsewhere and failed after a very short time. My tech found that it had failed due to oil starvation because the oil pickup screen was filled completely with pieces of silicon/RTV gasket sealer. The original "engine rebuilder" had told the customer that he guaranteed his engines not to leak therefore he had used 10 tubes of RTV during assembly. Needless to say, most bearings and the crankshaft were ruined.
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- Posts: 67
- Joined: Sat Jan 12, 2019 10:30 pm
- First Name: Aaron
- Last Name: Griffey
- * REQUIRED* Type and Year of Model Ts owned: 1926 touring
- Location: Hayward, ca.
Re: Careful with RTV
Yup, moderation is the word.
Just enough to see that there is some there.
Several years ago we took in a Volvo that couldn’t blow heat out of the heater.
I found the heater hoses were put on with blue RTV and it had plugged the temp control valve.
I helped a guy change a third member on a 63 year old car a couple of months ago.
He wouldn’t let me use sealer.
He said he was always taught to use grease.
When we finished the job and filled it with gear oil it only leaked at the third member and the axle flanges on each side.
At least he saved the dollar fifty by being able to reuse the gaskets.
Try this trick:
Get two five gallon buckets, drill an 1/8” hole in the bottom of each bucket.
Plug one hole with RTV or Right Stuff, the other buckey plug the hole with grease. let them set for an hour.
Now fill each bucket half full of water.
Come back the next day and see which one still has water in it.
Just enough to see that there is some there.
Several years ago we took in a Volvo that couldn’t blow heat out of the heater.
I found the heater hoses were put on with blue RTV and it had plugged the temp control valve.
I helped a guy change a third member on a 63 year old car a couple of months ago.
He wouldn’t let me use sealer.
He said he was always taught to use grease.
When we finished the job and filled it with gear oil it only leaked at the third member and the axle flanges on each side.
At least he saved the dollar fifty by being able to reuse the gaskets.
Try this trick:
Get two five gallon buckets, drill an 1/8” hole in the bottom of each bucket.
Plug one hole with RTV or Right Stuff, the other buckey plug the hole with grease. let them set for an hour.
Now fill each bucket half full of water.
Come back the next day and see which one still has water in it.