Horrible noise after engine install! - Subaru Impreza GC8 & RS Forum & Community: RS25.com

Shiffy · 07-02-2009, 12:07 PM

So the good news.....I got my engine in and after a small issue with a leaking injector it fired right up. The bad news.....well it's making a horrible noise.

I'm pretty sure I narrowed it down to 2 possibility's. It's coming from the flywheel area and sounds like a intermediate banging of metal. Since the car will move and the clutch seems to engage/disengage smoothly and will hold the torque I don't think it's the clutch.

I think it's either from the pins on the flywheel, or the starter on the ring gear. It's a Fidanza flywheel and the pins for the clutch stick out a little bit more then on the stock flywheel. It's not much and I thought there would be plenty of space for them but perhaps not.

Or the starter ring. Has anyone had any issues with their starter alignment? I know in allot of vehicles they have to be aligned with shims, but I don't have much experience with Subys.

The other thing I thought of is the throwout bearing but I spun it by hand before installing the engine and it spun smoothly and quietly.

Has anyone had a similar issue or might know what I'm dealing with? Any help would be appreciated I really don't want to pull the engine back out.

Jason

**t3hWIT** · 07-02-2009, 01:05 PM

Does the noise go away when you press the clutch pedal?

Shiffy · 07-02-2009, 02:30 PM

nope, doesn't stop with the clutch in or out, In gear or in neutral. It must have something to do with the rotating assembly, either the flywheel or the pressure plate.

I popped out the starter and turned the engine so I can feel the pins and they "feel" fine. I need a step stool to see them (if it's even possible).

SleepySubie · 07-02-2009, 02:50 PM

(rod bearing)

**av3ng3r** · 07-02-2009, 02:51 PM

Flywheel dust plate rubbing against the flywheel maybe?

Shiffy · 07-02-2009, 03:01 PM

oh god I hope it's not a rod bearing. the engine rotated smoothly before I put it in.

Also, I don't have a dust plate...did the older engines use them?

SleepySubie · 07-02-2009, 04:22 PM

Quote:

Originally Posted by Shiffy

oh god I hope it's not a rod bearing. the engine rotated smoothly before I put it in.

Also, I don't have a dust plate...did the older engines use them?

search youtube for some rod bearing vids

i hate to say it but. if the noise goes away when you rev the motor its likly to be rod bearing.

just go search youtube for bad rod bearings

DaveP · 07-02-2009, 04:32 PM

could the sound your hearing be your water pump going due to a need in changing your timing belt? just throwing it out there. My buddys 02 wrx made a horrible sound and he later found out it was the water pump cause his Timing belt was about ready to brake off

**vermont22gt** · 07-02-2009, 06:30 PM

Maybe it's an issue with the pilot bearing. You did put one in right? Maybe you forgot to tighten a pressure plate bolt. If I were you I'd yank the motor and find out for sure.

The older engines did have a dust plate. If you don't have one than that's not the source of the noise.

Good luck.

Shiffy · 07-02-2009, 09:36 PM

I sorta misspoke when I said "intermittent". When the engine is running, it sounds steady, varying with RPM. When you turn the engine over by hand it seems like there are two spots about 120deg apart. Thats why I was thinking the pins, but I realized the pressure plate is taller then the pins.

Maybe somehow the pressure plate didn't end up sitting flat and it's rubbing on the way around?

I guess I'll just have to pull the engine back out, should be faster the second time.

07-02-2009, 12:07 PM	#1 (permalink)
Shiffy 3.3L Car: 05' Silver RS Fav Mod: Cams for sure My: Subaru Parts My: Subaru Blog Join Date: Dec 2008 Location: Poulsbo, WA Trader Rating: (1) Posts: 622	Horrible noise after engine install! So the good news.....I got my engine in and after a small issue with a leaking injector it fired right up. The bad news.....well it's making a horrible noise. I'm pretty sure I narrowed it down to 2 possibility's. It's coming from the flywheel area and sounds like a intermediate banging of metal. Since the car will move and the clutch seems to engage/disengage smoothly and will hold the torque I don't think it's the clutch. I think it's either from the pins on the flywheel, or the starter on the ring gear. It's a Fidanza flywheel and the pins for the clutch stick out a little bit more then on the stock flywheel. It's not much and I thought there would be plenty of space for them but perhaps not. Or the starter ring. Has anyone had any issues with their starter alignment? I know in allot of vehicles they have to be aligned with shims, but I don't have much experience with Subys. The other thing I thought of is the throwout bearing but I spun it by hand before installing the engine and it spun smoothly and quietly. Has anyone had a similar issue or might know what I'm dealing with? Any help would be appreciated I really don't want to pull the engine back out. Jason

07-02-2009, 01:05 PM	#2 (permalink)
t3hWIT Preemie Weenie Fav Mod: Subaru credit card My: Subaru Parts My: Subaru Blog Join Date: Feb 2006 Location: Rockland County, New York Trader Rating: (26) Posts: 3,896	Does the noise go away when you press the clutch pedal? __________________ This used to be a nice neighborhood.

07-02-2009, 02:50 PM	#4 (permalink)
SleepySubie 2.5L RS-T Car: 2000 Imp 5 door Sport My: Subaru Parts My: Subaru Blog Join Date: Oct 2006 Location: Blacksburg VA Trader Rating: (15) Posts: 6,012	(rod bearing) __________________ 4/16/07 - 33 killed and almost 30 shot here at VT

07-02-2009, 04:32 PM	#8 (permalink)
DaveP 2.5L Car: 2002, Impreza Ts, Red Fav Mod: Stock son. My: Subaru Parts Join Date: Jun 2008 Location: Derry NH Trader Rating: (0) Posts: 240	could the sound your hearing be your water pump going due to a need in changing your timing belt? just throwing it out there. My buddys 02 wrx made a horrible sound and he later found out it was the water pump cause his Timing belt was about ready to brake off __________________

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07-02-2009, 02:30 PM	#3 (permalink)
Shiffy 3.3L Car: 05' Silver RS Fav Mod: Cams for sure My: Subaru Parts My: Subaru Blog Join Date: Dec 2008 Location: Poulsbo, WA Trader Rating: (1) Posts: 622	nope, doesn't stop with the clutch in or out, In gear or in neutral. It must have something to do with the rotating assembly, either the flywheel or the pressure plate. I popped out the starter and turned the engine so I can feel the pins and they "feel" fine. I need a step stool to see them (if it's even possible).

07-02-2009, 02:51 PM	#5 (permalink)
av3ng3r Air tool surgeon Car: 1999 Impreza RS 5MT STM Fav Mod: AGX's & V7 STi RA Springs My: Subaru Parts My: Subaru Blog Join Date: Aug 2006 Location: Southeast WI Trader Rating: (0) Posts: 305	Flywheel dust plate rubbing against the flywheel maybe?

07-02-2009, 03:01 PM	#6 (permalink)
Shiffy 3.3L Car: 05' Silver RS Fav Mod: Cams for sure My: Subaru Parts My: Subaru Blog Join Date: Dec 2008 Location: Poulsbo, WA Trader Rating: (1) Posts: 622	oh god I hope it's not a rod bearing. the engine rotated smoothly before I put it in. Also, I don't have a dust plate...did the older engines use them?

07-02-2009, 06:30 PM	#9 (permalink)
vermont22gt """""""""""""""""""" Car: 94 L My: Subaru Parts Join Date: Jul 2008 Location: NEK,VT Trader Rating: (0) Posts: 1,515	Maybe it's an issue with the pilot bearing. You did put one in right? Maybe you forgot to tighten a pressure plate bolt. If I were you I'd yank the motor and find out for sure. The older engines did have a dust plate. If you don't have one than that's not the source of the noise. Good luck.

07-02-2009, 09:36 PM	#10 (permalink)
Shiffy 3.3L Car: 05' Silver RS Fav Mod: Cams for sure My: Subaru Parts My: Subaru Blog Join Date: Dec 2008 Location: Poulsbo, WA Trader Rating: (1) Posts: 622	I sorta misspoke when I said "intermittent". When the engine is running, it sounds steady, varying with RPM. When you turn the engine over by hand it seems like there are two spots about 120deg apart. Thats why I was thinking the pins, but I realized the pressure plate is taller then the pins. Maybe somehow the pressure plate didn't end up sitting flat and it's rubbing on the way around? I guess I'll just have to pull the engine back out, should be faster the second time.

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