• Advertisement

Noisy 4JB1

Get help fixing your Isuzu from other club members

Noisy 4JB1

Postby magicdeo » Thu Jun 02, 2016 5:57 pm

Hi all. Lately my 2.8 rodeo has been a bit noisier than usual. Not as loud as a cold start when the CSD kicks in but definately louder than usual. The only thing that has changed lately is that I recently change over to a CAV style fuel filter and water trap, and we have just got cold weather so the mornings have been down around 2 and 3 degrees. The glow plug timer seems to work fine but the engine is noisier even in the day when the temos are around 18 to 20 degrees. The noise doesnt change even when warmed up. Anyone know what could cause this? CSD solenoid? Etc? Cheers
magicdeo
Isuzu Junior
 
Posts: 147
Joined: Mon Nov 24, 2014 9:35 am
Age: 21
Country: Australia
City: Newcastle
Vehicle: 1997 Holden Rodeo

Re: Noisy 4JB1

Postby magicdeo » Thu Jun 02, 2016 6:13 pm

It used to be very noisy on a cold start until the engine warmed up then there was a distinct drop in engine noise as the CSD kicked out. Now the noise gets less but not as quiet as it should. Cheers
magicdeo
Isuzu Junior
 
Posts: 147
Joined: Mon Nov 24, 2014 9:35 am
Age: 21
Country: Australia
City: Newcastle
Vehicle: 1997 Holden Rodeo

Re: Noisy 4JB1

Postby isuzurob » Thu Jun 02, 2016 6:29 pm

is it gear driven or cambelt 4jb-t?
isuzurob
Global Moderator
 
Posts: 1775
Joined: Mon Jun 07, 2010 6:12 pm
Age: 25
Country: New Zealand
City: Taupo
Vehicle: 1990 Isuzu Bighorn 2.8t/d, 3" extended shackles, 2" body lift, 33" silverstone extreme tyres, Front+rear bars, winch with 40m dyneex rope, 21/2 inch exhaust, lokka's front+rear, custom turbo, emissions removed, injector pump modified and more

Re: Noisy 4JB1

Postby magicdeo » Thu Jun 02, 2016 6:34 pm

Gear driven
magicdeo
Isuzu Junior
 
Posts: 147
Joined: Mon Nov 24, 2014 9:35 am
Age: 21
Country: Australia
City: Newcastle
Vehicle: 1997 Holden Rodeo

Re: Noisy 4JB1

Postby isuzurob » Fri Jun 03, 2016 6:22 pm

if its done around 380,000km the gear driven engine has issues with the injector pump idler gear bearing failing, then it snaps the snout off the block, hard to say if yours is this without hearing it
isuzurob
Global Moderator
 
Posts: 1775
Joined: Mon Jun 07, 2010 6:12 pm
Age: 25
Country: New Zealand
City: Taupo
Vehicle: 1990 Isuzu Bighorn 2.8t/d, 3" extended shackles, 2" body lift, 33" silverstone extreme tyres, Front+rear bars, winch with 40m dyneex rope, 21/2 inch exhaust, lokka's front+rear, custom turbo, emissions removed, injector pump modified and more

Re: Noisy 4JB1

Postby magicdeo » Sat Jun 04, 2016 6:16 pm

You have nearly nailed that isuzurob, she has 387 000kms to be exact. I dont know what noise this would make but it doesnt sound like a failed bearing, just sounds normal only a lot noisier, like when it is cold. Which solenoid is the CSD? Could i unplug that and run the engine to see if it makes a difference?
magicdeo
Isuzu Junior
 
Posts: 147
Joined: Mon Nov 24, 2014 9:35 am
Age: 21
Country: Australia
City: Newcastle
Vehicle: 1997 Holden Rodeo

Re: Noisy 4JB1

Postby magicdeo » Sun Jun 05, 2016 9:56 am

Update on my problem. I read on other forums that when the thermo switch on the thermostat housing is disconnected, the glowplugs should glow for maximum time and the CSD comes on and of course gets louder. When i disconnected mine, the glowplugs did glow but the engine sounded exactly the way it has been lately, making me think the CSD is always activated even though the glow plugs click off. Anyone know what could cause this?
magicdeo
Isuzu Junior
 
Posts: 147
Joined: Mon Nov 24, 2014 9:35 am
Age: 21
Country: Australia
City: Newcastle
Vehicle: 1997 Holden Rodeo

Re: Noisy 4JB1

Postby magicdeo » Mon Aug 15, 2016 1:02 pm

For anyone interested, turns out the back of the pump at the CSD was all blocked up causing the timing to always advance
magicdeo
Isuzu Junior
 
Posts: 147
Joined: Mon Nov 24, 2014 9:35 am
Age: 21
Country: Australia
City: Newcastle
Vehicle: 1997 Holden Rodeo

Re: Noisy 4JB1

Postby MUVIT » Thu Nov 03, 2016 7:28 pm

good info
MUVIT
Isuzu Guru
 
Posts: 539
Joined: Thu Nov 19, 2009 2:35 pm
Age: 27
Country: Aus
City: Darwin
Vehicle: Isuzu MU 96


Return to Engine

Who is online

Users browsing this forum: No registered users and 17 guests