Probably something simple. (1 Viewer)

[WIP77FJ]

I own a 1977 landcruiser fj40. I recently did an engine swap to a 1983 engine. After assembling everything together I noticed an awful sound, I can't even think straight this noise is so loud.
I have installed a new clutch I had the flywheel machined and I installed a new throw-out bearing. I left the old pilot bearing in. I have replaced the intake and aftermarket header exhaust manifold gaskets twice, doing two different combinations of installing it, but this God-Awful noise still persists. Tonight I took out the transmission because a mechanic friend said it sounded like the clutch or something to do with that and the noise still persisted I have now taken the clutch completely off and the noise is still here.
Some more info on the noise is it sounds like a teakettle, and no matter what you are doing with the throttle or clutch it persists. Sometimes it slowly fades on it's own, but it always comes back. It's so loud I don't think it could be a manifold leak and no matter the RPM it is still there.
I have used a stethoscope to try and narrow it down I listened to the rear main bearing and it was quiet as could be and the water pump sounded normal. I also put it on the exhaust and intake but nothing there. The car has no belt tensioner, power steering, or AC. It also has a somewhat new alternator.
Thanks.

 

[Fast Eddy]

Where'd you get the engine? Post up a little video with the sound.

 

[WIP77FJ]

I believe my dad ordered it through cruiser parts net. they said it had compression of 150 when we bought it when we did a wet test it only got up to 120, however they might use a leakdown test. I'll try to upload another video but my phone keeps corrupting the file.

 

[WIP77FJ]

Possible cause?? I got a gasket to go in between the exhaust headers and the muffler system I could not find an exact fit. So the gasket has a smaller ID than the regular exhaust flange and pipe. Could that be the cause?

 

[brian]

I believe my dad ordered it through cruiser parts net. they said it had compression of 150 when we bought it when we did a wet test it only got up to 120, however they might use a leakdown test. I'll try to upload another video but my phone keeps corrupting the file.

lol....

 

[WIP77FJ]

https://www.youtube.com/watch?v=_jmouc8fyhU Here's the vid, sorry it filmed sideways like that the phone decided to screw up my pristine camera work.

 

[Okie joe]

It sounds like the sound is dependent on vacuum levels. I,d look at the carb and intake. I had a weber carb that was not that noisy but noisy due to a vacuum leak.

 

[saryon7]

Have you tried running the engine with no belts on? It sounds like metal to metal contact to me. Or possibly something spinning that is out of balance. And seems a pretty big drop to go from 150 psi across the board and be 120 psi across the board for you.

A leakdown test doesn't check the compression. It fills the combustion chamber with air pressure and then shows on the gauge whether it is holding the pressure. They are mostly used though when you have an engine leak and you are trying to figure out where the leak is- intake valves, exhaust valves, rings, or gasket. You can usually hear the air coming from the respective leak spot.

Hope you can find it, and it is something small.

 

[brian]

that is not exhaust.
what accessories are on the engine?

 

[WIP77FJ]

Just the water pump, alternator, and crankshaft pulley, the sound seems to come from the back of the engine. A lot better than the 60 psi my old one had.

 

[brian]

I think they arrived at that 150 num by lying. not too sure though.

that's not out of the question.
it sounds very metallic, and there is nothing at the back that should be doing that. what kind of oil pressure does it have? drain the oil, what does it look like?

 

[vtgbeemer]

I would remove the belts and run it only long enough to see if the noise changes. I would also look for a shiney place on the crank pulley. I would also see if anything looks odd in the bellhousing/flywheel area. It sounds like metal against metal to me .

 

[WIP77FJ]

Just the water pump, alternator, and crankshaft pulley, the sound seems to come from the back of the engine. A lot better than the 60 psi my old one had.

.....

 

[Okie joe]

Could the starter not be disengaging after it starts?

 

[racemaniac]

hmmm thats kinda weird, sounds non rev-dependant, vibration of some sort?

 

[racemaniac]

no wait, thats probably the vacuum reservoir, or on of the hoses going from or to it, clamp of the vacuum hose comming from the pump on the alternator, itll probably fix your sound, then youll know where to look, cos you need vacuum

 

[WIP77FJ]

Car has been de-smogged only 3 vac lines, to the brake booster, pcv, and dist.

 

[brian]

no wait, thats probably the vacuum reservoir, or on of the hoses going from or to it, clamp of the vacuum hose comming from the pump on the alternator, itll probably fix your sound, then youll know where to look, cos you need vacuum

no such part on a petrol 2f.

 

[WIP77FJ]

Starter disengages just fine.

 

[WIP77FJ]

I just tightened all the bolts on the manifold again down to 40lbs. no change in pitch. I'm gonna make a vid and send it off to the guys at cruiser parts I hear they have some good cust. service.