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#15
by
Mark(The Miser)UK
on 16 Mar, 2011 20:18
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I sold an engine to a friend for his caddy and gave him help setting it up.
It knocks quite heavily
I changed the pump timing and still the knock remained, I even swung the pump across it's timing limits while the engine was running - no real change.
He swapped the injectors for known good ones - still knocking.
Fearing the worst I missed out on Sunday lie in and was down at his garage early, I pulled the head - very clean, slight carbon build up on number 3 but as expected.
Now pulled the sump, nothing in the oil, dropped the connecting rod caps and pulled the pistons out to check
Still nothing
It's not lifters as it's not 'that' type of ticky noise, it's more clack.
Any ideas people? It starts and runs fine. Just noisy.
It can only be pump now surely?
It could be the valves kissing the pistons, or getting very close to them.
Nearest point is not TDC but a little either side, as the piston chases the exhaust valve before it closes BTDC and as the inlet chases the piston ATDC.
The sound echoes out the manifolds. Worsened by skimming of head, naturally...
My engine has been doing it for 30,000miles
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#16
by
fatmobile
on 17 Mar, 2011 00:52
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Rod pins feel sloppy in the pistons?
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#17
by
regcheeseman
on 17 Mar, 2011 18:16
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Gudgeon pins and small ends are fine - that was my no1 suspect after timing and injectors were eliminated.
It could be the valves kissing the pistons, or getting very close to them.
I'd expect to see some witness marks - there is nothing
No 2 piston has a little dent on one edge, looks like something solid entered the chamber made two dents before being spat out, there's a corresponding mark on the cylinder wall - but no damage, not significant.
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#18
by
maxfax
on 18 Mar, 2011 00:14
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Off the wall question, is this engine hydro or mech lifter???
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#19
by
Mark(The Miser)UK
on 18 Mar, 2011 05:23
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I sold an engine to a friend for his caddy and gave him help setting it up.
It knocks quite heavily
I changed the pump timing and still the knock remained, I even swung the pump across it's timing limits while the engine was running - no real change.
He swapped the injectors for known good ones - still knocking.
Fearing the worst I missed out on Sunday lie in and was down at his garage early, I pulled the head - very clean, slight carbon build up on number 3 but as expected.
Now pulled the sump, nothing in the oil, dropped the connecting rod caps and pulled the pistons out to check
Still nothing
It's not lifters as it's not 'that' type of ticky noise, it's more clack.
Any ideas people? It starts and runs fine. Just noisy.
It can only be pump now surely?
Reg,
If you can take the vehicle out for a drive, then on a quiet stretch [might still be one in Devon way]with the clacking happening, turn off the engine, whilst still in gear and see if the sound disappears, if it goes, then its fuel, if it doesn't then it's 'mech'
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#20
by
regcheeseman
on 18 Mar, 2011 08:16
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Off the wall question, is this engine hydro or mech lifter???
hydro
Mark/Blackdogvan
I'll try that test when it's rebuilt, the workshop is right next to the only real dual carriageway in North Devon. A well known test strip.
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#21
by
sdwarf36
on 18 Mar, 2011 12:21
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If you crack the fuel lines one at a time, you will take the load off that cylinder( no fuel= no fire=no load) -you can see if the noise changes.
To check for the flywheel bolts, put the car in gear-have someone stand hard on the brakes-and go back+ forth with the crank bolt. Look to see if the flywheel moves the same amount as the crank bolt.
Also-are #1+4 piston up the same amount? (just thinking possible prior bent rod)
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#22
by
regcheeseman
on 18 Mar, 2011 18:34
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If you crack the fuel lines one at a time, you will take the load off that cylinder( no fuel= no fire=no load) -you can see if the noise changes.
To check for the flywheel bolts, put the car in gear-have someone stand hard on the brakes-and go back+ forth with the crank bolt. Look to see if the flywheel moves the same amount as the crank bolt.
Also-are #1+4 piston up the same amount? (just thinking possible prior bent rod)
Rods are fine, already done the injector test before tearing the motor down.
I'll do the flywheel test.
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#23
by
rdezsofi
on 19 Mar, 2011 02:21
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I guess you have it torn apart.....how are this pistons and bore, as far as measurements? I'm thinking severe piston slap maybe??? Did you do a compression check prior to teardown? It might just have extremely high compression. (Head surfaced, etc, etc.)
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#24
by
Mark(The Miser)UK
on 19 Mar, 2011 05:26
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Off the wall question, is this engine hydro or mech lifter???
hydro
Mark/Blackdogvan
I'll try that test when it's rebuilt, the workshop is right next to the only real dual carriageway in North Devon. A well known test strip.
Hi,
I'd just like to apologise to Blackdog van , I didn't spot his [I assume a chap ] prior post detailing similar technique.
"I must read the threads more closely I must read...."
In my defence, my technique removes even more fuel
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#25
by
regcheeseman
on 24 May, 2011 03:45
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It's got me beat! looks like the turbo seal is giving up the game too.
We're going to fit another engine and this one will get an autopsy at some point.
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#26
by
Mark(The Miser)UK
on 24 May, 2011 05:23
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It's got me beat! looks like the turbo seal is giving up the game too.
We're going to fit another engine and this one will get an autopsy at some point.
Don't you hate that.
I'm thinking my only solution in my case is to remove the 'unleaking head' and skim the outer exhaust valves.
I too had bought small end and big end bearings, expecting[hoping] to find a rogue one; but no play detected so the kits remain in reserve.
Did the sound continue with no fuelling?
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#27
by
carrizog60
on 25 May, 2011 08:34
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my aaz(well 1y with turbo) is now making a tim tim tim sound,not clatter...
not to highjack the thread sorry but can anyone help?
timed to 1.00mm,with aaz injectors and 1.6 gtd fuel pump
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#28
by
regcheeseman
on 26 May, 2011 05:43
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FIXED IT
I can't take any credit for doing so, it was only spotted by a mechanic who had a Toyota Hilux doing similar.
Basically despite have the injector lines and pump removed at least four times, no-one noticed that they were wrong.
The previous owner had managed to bend them to fit in a different sequence. They didn't look obviously bent and offered themselves up to the head quite naturally.
A quick switch around and it's running sweet as!
It's surprising that it started, idled and run quite happily in it's mixed up state.
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#29
by
macka
on 26 May, 2011 06:05
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well its fixed and all is well. That is funny that it ran