Noticably louder clatter

Lantec · 03-24-07, 05:42 PM

Whenever the 3B is at the stop and the revs are around 650-700ish, if the clutch is depressed, then there is this louder clatter that comes out but goes away after i press in the clutch or blip the throttle or turn the knob to about 800rpm.

Is this supposed to be normal? It's been like this since i got the truck but didn't know if it was supposed to be like this.

And would there be any harm in just idling at 800rpm?

brownbear · 03-24-07, 06:40 PM

Your exhaust is touching something..... at low idle the engine shakes more, bet it is contacting something somewhere....might even be on a skid plate.

I had a bad one from a slightly bent skid plate, always there when I left the intersection. Drove me nuts. I could not find it. I finially brought it to a shop and let them look.

For the longest time I thought it was the rear brakes......

Look underneath for really tight spots.

Also start the truck. (BRAKES ON, WHEELS BLOCKED, IN NEUTRAL) And slid around under there and look for the sound. Have the idle really low and see if you can spot it......

roscoFJ73 · 03-24-07, 09:54 PM

Quote:

Originally Posted by Lantec

Whenever the 3B is at the stop and the revs are around 650-700ish, if the clutch is depressed, then there is this louder clatter that comes out but goes away after i press in the clutch or blip the throttle or turn the knob to about 800rpm.

Is this supposed to be normal? It's been like this since i got the truck but didn't know if it was supposed to be like this.

And would there be any harm in just idling at 800rpm?

It maybe the exhaust knocking but I have a feeling it is just the clatter of an old diesel.
Most diesels,even when new,do it to some extent.

Im guessing its because the engine has no load on it ,the engine components kind of ring like a bell on each compression stroke
Its like bashing a piece of steel with a hammer,but when you place our hand on it ,the noise is dampened
When you change the rpm speed or add even a small load like a clutch plate scraping,its enough to dampen the sound.
Certainly no harm in increasing the rpm. Make sure it is nothing loose 1st

HeepEater · 03-25-07, 12:02 AM

You know I had the same issue with my truck. It always has idled like a SOB but one day it was 10 times louder. Come to find out my tranny skid plate was just close enough to bump the tranny at low idle

ing. It just needed a little adjustment.

Lantec · 03-25-07, 01:05 AM

Quote:

Originally Posted by HeepEater

You know I had the same issue with my truck. It always has idled like a SOB but one day it was 10 times louder. Come to find out my tranny skid plate was just close enough to bump the tranny at low idle

ing. It just needed a little adjustment.

How did you adjust that problem?

brownbear · 03-25-07, 12:40 PM

My skid plate had to be hammered out where it contacted. Once done it was great.

Lantec · 03-25-07, 01:00 PM

Quote:

Originally Posted by brownbear

My skid plate had to be hammered out where it contacted. Once done it was great.

Using hammer as a tool? Sweet

Winslow · 03-25-07, 04:14 PM

Quote:

Originally Posted by Lantec

Using hammer as a tool? Sweet

Hammers are the original tool!!! There is hardly anything my mini-sledge won't fix- or at least make me feel better about!

brownbear · 03-25-07, 04:43 PM

Yup the mini sledge is a good tool. In fact with out it the birf job would be almost impossible..

Fantom · 03-25-07, 05:02 PM

My truck has a constant problem with the little exhaust bracket under the manifold coming loose all the time. When it does, a clanking sound can be heard, check to see if all of your exhaust brackets are tight. Also when is the last time you adjusted your valves?

Lantec · 03-25-07, 05:49 PM

Quote:

Originally Posted by Fantom

My truck has a constant problem with the little exhaust bracket under the manifold coming loose all the time. When it does, a clanking sound can be heard, check to see if all of your exhaust brackets are tight. Also when is the last time you adjusted your valves?

Umm I don't know. I bought the truck from ATEB at 163k, the truck is at 170k now after its first oil change. It's done that from that start. it'll be louder clattering at low RPMs and it'll go away if I blip the throttle or make it idle faster

brownbear · 03-25-07, 08:00 PM

That's why I think it is external, the engine smooths out quite a bit off idle.

If you don't know when your valves were adjusted, just plan to do it. Get your tools /gasket etc ready and do it one weekend. Lots of info on the net, fsm etc to do it yourself.

Seen this on the net............ http://www.dewit.ca/archs/3B/index.html

Lantec · 03-25-07, 10:36 PM

Quote:

Originally Posted by brownbear

That's why I think it is external, the engine smooths out quite a bit off idle.

If you don't know when your valves were adjusted, just plan to do it. Get your tools /gasket etc ready and do it one weekend. Lots of info on the net, fsm etc to do it yourself.

Seen this on the net............ http://www.dewit.ca/archs/3B/index.html

What would the tools needed to adjust valves?

There's the shims and wrenches... would i need to replace the gaskets too?

brownbear · 03-25-07, 10:39 PM

feeler gauges and a gasket.

the rest would be normal hand tools like wrenches and sockets.

Lantec · 03-25-07, 10:52 PM

Quote:

Originally Posted by brownbear

feeler gauges and a gasket.

the rest would be normal hand tools like wrenches and sockets.

gaskets would be bought from toyota parts depts. right?

EDIT: I noticed today when I was checking out the clatter, it wasn't coming from any parts of the exhaust knocking against it. It seems to come from underneath the engine.

It sounds identical to the diesel clatter, but just higher pitched and... annoying

83bj60 · 03-25-07, 11:55 PM

Quote:

Originally Posted by Lantec

gaskets would be bought from toyota parts depts. right?

EDIT: I noticed today when I was checking out the clatter, it wasn't coming from any parts of the exhaust knocking against it. It seems to come from underneath the engine.

It sounds identical to the diesel clatter, but just higher pitched and... annoying

Nobody has suggested it so here goes: what about the tranny? My old 60 did that ever since I had it, and it never really bothered it. Always noisier at idle in neutral, goes away when you depress the clutch.

HTH...

Garry · 03-27-07, 05:24 PM

Quote:

Originally Posted by 83bj60

Nobody has suggested it so here goes: what about the tranny? My old 60 did that ever since I had it, and it never really bothered it. Always noisier at idle in neutral, goes away when you depress the clutch.

HTH...

X2 The gears in the gear box chatter together when free running at idle in neutral. Nothing to worry about!

Lantec · 03-27-07, 11:45 PM

Quote:

Originally Posted by Garry

X2 The gears in the gear box chatter together when free running at idle in neutral. Nothing to worry about!

Ah ok

I was checking for any parts hitting but couldn't and I thought there was something broken hehe

03-24-07, 05:42 PM	#1
Lantec IH8MUD Regular Join Date: Aug 2006 Location: Coquitlam, BC Posts: 292	Noticably louder clatter Whenever the 3B is at the stop and the revs are around 650-700ish, if the clutch is depressed, then there is this louder clatter that comes out but goes away after i press in the clutch or blip the throttle or turn the knob to about 800rpm. Is this supposed to be normal? It's been like this since i got the truck but didn't know if it was supposed to be like this. And would there be any harm in just idling at 800rpm?

03-24-07, 06:40 PM	#2
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	Your exhaust is touching something..... at low idle the engine shakes more, bet it is contacting something somewhere....might even be on a skid plate. I had a bad one from a slightly bent skid plate, always there when I left the intersection. Drove me nuts. I could not find it. I finially brought it to a shop and let them look. For the longest time I thought it was the rear brakes...... Look underneath for really tight spots. Also start the truck. (BRAKES ON, WHEELS BLOCKED, IN NEUTRAL) And slid around under there and look for the sound. Have the idle really low and see if you can spot it...... __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

03-25-07, 12:40 PM	#6
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	My skid plate had to be hammered out where it contacted. Once done it was great. __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

03-25-07, 04:43 PM	#9
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	Yup the mini sledge is a good tool. In fact with out it the birf job would be almost impossible.. __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

03-25-07, 05:02 PM	#10
Fantom I'm Polish-don't taser me Join Date: Jun 2006 Location: Port Coquitlam TLCA# 16277 Posts: 1,170	My truck has a constant problem with the little exhaust bracket under the manifold coming loose all the time. When it does, a clanking sound can be heard, check to see if all of your exhaust brackets are tight. Also when is the last time you adjusted your valves? __________________ Mat R. '84 BJ-60 with some goodies, found a new body - soon to start a new creation. PICS or you can see them the old fashioned way here "Idiot proof will not stop a determined idiot" "Never assume malice when stupidity will suffice"

03-25-07, 12:02 AM	#4
HeepEater IH8MUD Junior Join Date: Apr 2006 Location: Okinawa, JP Posts: 85	You know I had the same issue with my truck. It always has idled like a SOB but one day it was 10 times louder. Come to find out my tranny skid plate was just close enough to bump the tranny at low idle ing. It just needed a little adjustment.

03-25-07, 08:00 PM	#12
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	That's why I think it is external, the engine smooths out quite a bit off idle. If you don't know when your valves were adjusted, just plan to do it. Get your tools /gasket etc ready and do it one weekend. Lots of info on the net, fsm etc to do it yourself. Seen this on the net............ http://www.dewit.ca/archs/3B/index.html __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

03-25-07, 10:39 PM	#14
brownbear Mod in Hibernation Join Date: Sep 2004 Location: Where diesels purr and turbos whine TLCA# 15584 Posts: 6,183	feeler gauges and a gasket. the rest would be normal hand tools like wrenches and sockets. __________________ -84 BJ60, Finally on the FN road! -91 FJ80, wife's ride Iron Butt award winner of the Cruise Moab 08 !

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