seal and piston ring questions
07-10-2013, 09:43 AM
#11
5th Gear Member
Join Date: Jul 2012
Location: ohio
Posts: 3,628
Don't try and install your rear main seal with the #5 cap still on. Not the correct way to do it. For the pan - make sure the gasket is set correctly in the groove on the timing cover and #5 cap. After you get it all put back together, take some black rtv and smooth it over that same area.
Oil leaks suck.
Also be sure you gap your rings correctly. I do 0.020 top ring, 0.024 bottom ring on an N/A set up. You will need to open yours up a little bit due to the boost.
While we're on the topic of oil & rings & boost, may want to look at switching from the factory pcv set up. As your rpm builds, your boost will build, especially with twins. If you opened up your rings as suggested, the boost will create blow by as expected. This will greatly increase crankcase pressure. A lot of turbo guys switch to a breather + catch can set up because the pcv system can't ventilate the crankcase pressure effectively. This pressure has to go somewhere as new pressure from the turbos is getting past the rings. It usually finds its way out via the rear main seal, oil pan gasket, etc.
Theres your circle of life between boost and rings. Lol
Oil leaks suck.
Also be sure you gap your rings correctly. I do 0.020 top ring, 0.024 bottom ring on an N/A set up. You will need to open yours up a little bit due to the boost.
While we're on the topic of oil & rings & boost, may want to look at switching from the factory pcv set up. As your rpm builds, your boost will build, especially with twins. If you opened up your rings as suggested, the boost will create blow by as expected. This will greatly increase crankcase pressure. A lot of turbo guys switch to a breather + catch can set up because the pcv system can't ventilate the crankcase pressure effectively. This pressure has to go somewhere as new pressure from the turbos is getting past the rings. It usually finds its way out via the rear main seal, oil pan gasket, etc.
Theres your circle of life between boost and rings. Lol
all very true ,, but from the sounds of it he will be building a 331 R block in no time lmao
07-10-2013, 10:08 AM
#13
2nd Gear Member
Thread Starter
Join Date: Jun 2010
Location: Pennsylvania
Posts: 347
Don't try and install your rear main seal with the #5 cap still on. Not the correct way to do it. For the pan - make sure the gasket is set correctly in the groove on the timing cover and #5 cap. After you get it all put back together, take some black rtv and smooth it over that same area.
Oil leaks suck.
Also be sure you gap your rings correctly. I do 0.020 top ring, 0.024 bottom ring on an N/A set up. You will need to open yours up a little bit due to the boost.
While we're on the topic of oil & rings & boost, may want to look at switching from the factory pcv set up. As your rpm builds, your boost will build, especially with twins. If you opened up your rings as suggested, the boost will create blow by as expected. This will greatly increase crankcase pressure. A lot of turbo guys switch to a breather + catch can set up because the pcv system can't ventilate the crankcase pressure effectively. This pressure has to go somewhere as new pressure from the turbos is getting past the rings. It usually finds its way out via the rear main seal, oil pan gasket, etc.
Theres your circle of life between boost and rings. Lol
Oil leaks suck.
Also be sure you gap your rings correctly. I do 0.020 top ring, 0.024 bottom ring on an N/A set up. You will need to open yours up a little bit due to the boost.
While we're on the topic of oil & rings & boost, may want to look at switching from the factory pcv set up. As your rpm builds, your boost will build, especially with twins. If you opened up your rings as suggested, the boost will create blow by as expected. This will greatly increase crankcase pressure. A lot of turbo guys switch to a breather + catch can set up because the pcv system can't ventilate the crankcase pressure effectively. This pressure has to go somewhere as new pressure from the turbos is getting past the rings. It usually finds its way out via the rear main seal, oil pan gasket, etc.
Theres your circle of life between boost and rings. Lol
07-10-2013, 10:10 AM
#14
2nd Gear Member
Thread Starter
Join Date: Jun 2010
Location: Pennsylvania
Posts: 347
07-10-2013, 10:24 AM
#15
5th Gear Member
Join Date: Jul 2012
Location: ohio
Posts: 3,628
07-10-2013, 10:34 AM
#16
4th Gear Member
Join Date: Jun 2011
Location: Indy
Posts: 1,353
You'll see a crack in the main around the main bolt holes, either #1 or #2 from what I've seen. It'll spider up the front of the block. The block literally tries to split itself. Probably scary as hell when it happens, the after math looks pretty cool lol. Lets hope you dont have an expensive bottom end, 'bout the only thing a girdle is good for is keeping it from grenading everywhere