Firstly, Using a rear main rope seal, is almost a thing of the past and has greatly diminished in use.
So, the rear main rope seal worked well in its time, as long as you completely understood the installation process.
Meanwhile, the installation technique of a rear main rope seal, was slowly being lost as they diminished in use. Furthermore, many younger installers did learn the technique because, it was far less common.
Subsequently, this operation was passed back, to the seasoned mechanic.
Because, they usually had the experience doing them once before.
So, as time went by, mechanics and engine rebuilders, slowly came up with alternative seals to make the job easier.
As a result, the list of alternative seals, has been growing with good success, solving problems, saving time and money.
But, don’t get me wrong, There is still a need, for a variety reasons:
- There is no alternative seal available.
- Doing a repair or rebuild and you just want to keep it original.
- The rope seal may be used in a timing cover.
- Many water pumps have used rope type seals.
So, whatever the reason, they will never completely go away. But, because they are getting less common, todays mechanics, my not even know what they are.
So, it has taken many years to collect this information. Consequently, this information is feedback, from people like you. People tell us these seals have worked fine for them, but will they work for you? Furthermore, there is no guarantee that they will work 100% of the time. However, the seals listed below, have proven to be the most successful.
Normal Split Seal Installation Instructions
During installation, offset or rotate each seal half ¼ to 3/8″ from the main cap parting line. Then, place a dab of anaerobic gel, on the ends of the seals that will butt together. In addition, lubricate the seal lip with, straight 50W oil or a bearing assembly lube. Above all, use a lube that will stay in place, until the engine is started.
Most importantly, seal manufacturers, do not recommend white grease alone, because they have seen too many failures, from dry startups.
This is especially true in rebuilt engines, that sit on the shelf for long periods of time. For example, I have seen chunks torn out of the contact face of the seals that have caused leaks. So, have you ever seen a Ford 390 or 460 tear the whole lip off the seal. As a result, of being dry, it stuck to the crankshaft.
The Following Is A Suggested List, Of Rear Main Rope Seal Alternatives
In short, This list will show all the information you need:
- Application of the engine you are working on.
- Application of the engine the alternative seal came from.
- Part numbers from major gasket and seal providers.
TO SUM UP, A LIST OF REAR MAIN ROPE SEAL ALTERNATIVES
|Working On||Came From||Detroit||Enginetech||Felpro||Rol||Victor|
|Buick 231||Jeep 225||17200||S-1389||BS40613||RS29470||JV742V|
|Buick 350||Ford 460||17043||N/A||BS40032||RS29130||JV618|
|Buick 400 430 455||Ford 200||17042||N/A||BS30135||RS29050||JV730|
|*GM 265 283||GM250||17053||S-0629||BS13241||RS29005||*JV728|
|* Install a .090″ (2.290 mm) diameter wire in the groove, behind the seal.|
|Caddy 265||Dodge 318||17032||S1196||BS40245||RS29040||JV606|
|Ford 312||Dodge 318||17032||S-1196||BS40245||RS29040||JV606|
|Olds 260 307 330 350 403||Ford 292||17175||N/A||BS6141||RS29310||N/A|
|Olds 350D 400 425 455||Ford 460||17043||N/A||BS40032||RS29130||JV618|
|Pont 301||Ford 460||17043||N/A||BS40032||RS29130||JV618|
|Pont 350||GMC 637||17091||N/A||BS40048||N/A||JV616|
|Pont 455||Caddy 500||17008||N/A||BS40012||RS29115||JV600|
NOTE: It has also been reported that, replacing the timing cover rope seal has proven effective on 455 Buick engines.
Use National seal Part #450446
Consequently, engines that use rope anti-rotation holes in the block and cap; need to be filled with (RTV) and let dry overnight.
So, today’s rear main rope seals, are not as effective at controlling oil as they once were.
Unfortunately, things are impacting rope seal usage:
For instance, the environmental laws that limit, the use of asbestos and other materials used in the original seals. Also, the efforts of manufacturers to limit part numbers. Furthermore, by manipulating the dimensions of the seal to fit as many applications as possible. As a result, the market for rope seals has greatly diminished. Finally, compromises are often made, in order to offer a cost-effective product.
Thank You !