Bearing issue ? |
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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Posted: 07-December-2019 at 5:47AM |
Hi to all, what a great forum to join. I am about to work on rebuilding / replacing a 351C engine, vintage 1974, that has a noise that reminds me / sounds like a squealing bearing. The engine runs, compression is reasonable good on all cylinders but with this noise I am afraid it won't run much longer. Fair to say the engine does not run very smooth . My mechanic's stethoscope tells me the squeal is at the back of the engine. When just turning the engine over (coil unplugged) there is no squeal. Shifting the C6 transmission into any gear does not stop the squeal either. looking for anyone's thoughts on if it could be a transmission issue and not something like a crank bearing.. Thanks to everyone.
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72FordGTS
Admin Group GTS.org Admin Joined: 06-September-2005 Location: Ontario, Canada Status: Offline Points: 5846 |
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Welcome aboard, feel free to introduce yourself in the Welcome Mat too. Do you have a video of the sound? Have you checked the oil pressure on the engine? I have never heard an engine bearing squeal.
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Vince
1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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really hard to say... usually if a bearing spins it with squeal for a second then pressure goes way up then down to nothing
it could be a loose bolt in the bellhousing or the plate bent rubbing the flexplate??? i'd check for a vacuum leak that could make a noise and would make it run crappy too... |
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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transmission pump whine?
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72 GT Ute
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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^^^ i thought about that too
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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you just don't hear a good trans pump whine any more .... reminds me of my 72 chop top, yup chopped off the top Roadster Baby! it had a distinct whine, sounded like it was doing a Batmobile impression, turbines ya know
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72 GT Ute
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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well when ya can't afford a blower, ya do the best ya can
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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keep them guessing you want noise? Oh wait i got this thing hangin out too |
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72 GT Ute
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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hmm ...1 pair aces high, nice, but 3 of a kind beats a pair
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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Well, when running ( rough ) I do show oil pressure on the factory gauges, who know if the gauge is actually reading variable pressure or if the sending unit is just on/off. So, further investigation shows only 2 quarts of oil in the pan and 1 quart (maybe) in the filter. I am sure that didn't help. Either way I am still going to pull the motor and tranny if for no other reason just to do a thorough clean up of both because the oil pan gasket is leaking everywhere and has blown oil all over the place.......no wonder the underside has no rust. LOL
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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BTW, I will post a picture or two once I learn how.
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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if you have the GT Sport gauges it should have the ability to read varying pressure with the large sending unit. but there are several different calibrations of sending units so if it's ever been replaced chances are it can be inaccurate to the gauge scale ---------------------------- are you kidding me? 3 little pink carbs don't beat 2 660 center squirters! 351-8V Baby!
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72 GT Ute
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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Well, a few more days and I'll have the engine on the workbench. Then I'll start disassembly. Should be interesting..
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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3x 500=1,500 and they're peach! not pink |
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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gather as much intel as you can before pulling the coil wire off ... mechanical oil psi, cylinder psi / compression test, save the spark plugs in order for post mortem diagnostic etc etc ------------------------- it takes a secure man to run peach carbs i don't care what anybody says and not judging .... but they're 500 each really? i didn't know if they were 1bbls or 2bbls time to up my game i guess, i'm not sit'n by while i get beat by peach carbs! who's got a Big Foot Alan Root motor layin around? Edited by Rockatansky - 10-December-2019 at 6:36PM |
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72 GT Ute
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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IIRC they are 500cfm? the throttle plate is at least the size of a silver dollar or bigger... they're rochester 1 bbl's
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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Well, the plan is to pull the motor and tranny out as one assembly, wanting to check the relationship and connection between the two as a source for the noise. Today I spent 1/2 the day getting out the tranny cross member. As mentioned in previous threads, what a job it was. So stupid to have the x member sitting on top of the frame brackets. After I removed all the bolts, I attached a come-a-long between the rear axle and the driver's side and another come-a-long between the front coil spring and pass. side of the crossmember and after jacking up the tranny I was able to twist out the cross member.......project engine rebuild is continuing tomorrow.
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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once you jacked the tranny up did you remove the mount?, then you should have plenty of room to lift the crossmember up and off the brackets
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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so much grease and oil under there, but yes all is well.
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6072 |
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i wonder if you'll find a broken / cracked flexplate?
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72 GT Ute
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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So today I found totally fried bearing inserts on cylinders 4 & 8.
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californiajohnny
Moderator Group Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14609 |
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not good!
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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Big Bird
Senior Member Joined: 25-August-2013 Location: New York Status: Offline Points: 4194 |
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Were you also missing nylon off the timing gears? |
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"What we do in full frontal view, is more honest than your cleaned-up mind."
Randy 1979 T-Bird 2005 F-150 STX RCSB 4.6, 3.55 LSD How the Heck does a REGULAR CAB SHORTBED weigh over 5200 pounds? |
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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Gears are all steel so I now know they have been previously replaced
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handsofstone
Senior Member Joined: 13-April-2018 Location: Northeast Status: Offline Points: 3946 |
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Every old Ford engine I have had with lots of miles developed lower end noise mostly due to not caring about changing the oil religiously and just adding a quart or so every week and a new filter never. Eventually it catches up and bye bye long block.
Looking forward to pics for sure. The only positive from oil leaks is definitely the rustproofing you get at bo cost. Haha
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Rivercrest
Member Joined: 07-December-2019 Location: Manitoba Canada Status: Offline Points: 175 |
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I've continued this topic here : 1972-1976 Ford and Mercury (18 Viewing)
Technical discussion for 1972-1976 Ford and Mercury Edited by 72FordGTS - 01-February-2020 at 9:55AM |
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Bob
1974 Cougar XR7 with a 72 351C |
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