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#1
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Oil control rings
Update on my issue with oil being pushed out the dipstick.
Builder has just said he's found a problem with the oil control rings tension being too weak. Could this be the reason for excessive blowby into the crankcase? He's ordered a different set of rings this time, hoping that's the fix.
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69 Firebird 472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120 |
#2
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I do not think that is your problem. Does your engine have the proper guide tube inside the pan for the dip stick? I have seen some engines over the years with piston pins that came out. Broken ring lands and they were not pumping oil out the dipstick tube.
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Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow. |
The Following User Says Thank You to chiefbigb For This Useful Post: | ||
#3
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I run a 9LB oil ring with a vacuum pump
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#4
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How do your plugs look?
If excessive oil was getting into the chamber then that would be seen on the plugs, but on top of that oil getting in there will lower the fuels Octane rating possibly by a lot. If that's the case then the motor could be detonating at a given throttle opening and detonation will unseat the rings making for blowby and abnormal crankcase pressure. I am not getting the warm and fuzzy's from the capabilities of your builder I must say at this point!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#5
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To put things in simple terms
oil controls rings do what? control oil.! Rings 1 and 2 control pressure oil is a static creature it just gets knocked / pushed around pressure is different high seeks out low high pressure in a crankcase will seek out low atmospheric pressure by exiting the engine any way it can usually by breathers if the breathers cant flow this given volume the dipstick gets ejected along with oil that is frothed / misted by crankshaft other than pressure i guess the dipstick could be forced out physically by interference with the rotating assy
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If your not at the table you're on the menu A man who falls for everything stands for nothing. |
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#6
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Plugs were not wet from oil, just blackened from running rich.
Dipstick isn't touching anything rotating.
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69 Firebird 472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120 |
The Following User Says Thank You to 461-69bird For This Useful Post: | ||
#7
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I was going through some pics and thought of you. Here is a pic of my IA2 block and another P/Y member with the breathers. At minimum you should consider holes in that valley area while the engine block is apart to do the rings. Just saying. I'm willing to bet you'll need to run a vacuum pump.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#8
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Quote:
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
#9
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Quote:
Hi: If your talking about the breathers, I don't know. It's not my engine block.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#10
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I think your problem is the rich condition or the bores not honed and cleaned properly or possibly improper break in or combination of all.
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#11
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Quote:
Where those breather fittings are, I already have the holes. By putting the breathers in there, what are the benefits over just holes?
__________________
69 Firebird 472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120 |
#12
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Quote:
Like I said in previous post I Don't Know. The dudes with the Brain power on here will know. I just posted pics for your reference. Hoping you make out OK. Oh and your welcome.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#13
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Okay thanks Chuck
__________________
69 Firebird 472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120 |
The Following User Says Thank You to 461-69bird For This Useful Post: | ||
#14
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What's happening with your engine? Any updates? Thanks
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#15
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Hi Chuck, engine has been re honed and new rings, just waiting for him to get it on the dyno to break them in again.
__________________
69 Firebird 472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120 |
#16
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Thanks. Wishing you great success with it.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#17
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Quote:
Thanks Rick
__________________
69 Firebird 472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120 |
#18
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I would think that his concern is that if the wrong lower block tube is used that the dip stick will not be the proper depth in the oil.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#19
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I have seen the inside guide missing on rebuilt engines. Oil capacity is incorrect. Not sure if the crank can throw enough around to push it up the tube at high rpms.
__________________
Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow. |
#20
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Chief, funny you say that as I had the same thought yesterday.
Engine is back together and leakdown is better, 10% on all 8. Made more hp and tq than before too. Oil came out the dipstick still but when we put a long hose over the tube so someone could check for pressure while in the dyno room on a pull, nothing came out and there was no pressure either. I'm going to cap off the tube and keep an eye out for any leaks elsewhere. Hopefully as there's no pressure it will be ok. It made 546hp and 597tq @32 deg.
__________________
69 Firebird 472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120 |
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