kes86

Active Member

• Nov 15, 2013

• #1

People may remember I messed up a cam belt change on my Defender 300tdi resulting in 8 bent pushrods and a broken follower. It's been fixed and back together for a month or so now. But despite checking the tappets a number of times, there is an intermittent tapping at higher revs or under load. It sounds like tappets or something top end. But only one tappet not a general rattle. I checked the rocker gear and also the follower cups when it was apart and no obvious damage. Any other suggestions? Did someone mention that the vac pump can do this?

Ta

 

Kwakerman

Well-Known Member

• Nov 15, 2013

• #2

You sure your pump timing isn't slightly over advanced?

 

kes86

Active Member

• Nov 15, 2013

• #3

The thought did cross my mind, that it could be diesel knock.

I used the fuel pump timing pin, but couldn't fit the flywheel pin as there is a wading plug stuck in the flywheel housing and the head is rounded off.

I will try to get the plug out and time it up properly, or just take the timing back a touch.

Cheers

 

Kwakerman

Well-Known Member

• Nov 16, 2013

• #4

If you try retarding it and it goes away then you have answered the question, if it doesn't then it will be something else (obviously). Think you need to get the wading plug out, first to time the engine and second to make sure you haven't got oil/water building in the bell-housing that could contaminate clutch. If the wading plug head is totally gone have you though about drilling through it and using an extractor to try and turn it out?.

 

kes86

Active Member

• Nov 16, 2013

• #5

Yes, will do probably going to weld a nut on the wading plug, it's proper chewed. My Evo is in the garage in bits now tho after thinking the defender may be sorted for a bit. So will need to wait for a decent day.

 

kes86

Active Member

• Nov 20, 2013

• #6

Quick tweek of the pump this morning, and it seemed less knocking on the way to work. Just took it back a touch more and it's quieter and revs a bit freer.

No idea whether I have white smoke or anything yet as it was too dark, I only moved it a tiny bit, but surprising the difference.

I didn't get the wading plug looked at yet, it hailed on me yesterday but will try and get time.

 

kes86

Active Member

• Nov 22, 2013

• #7

Got wading plug out with some of those Irwin rounded nut removers. Timed pump properly, it wasn't too far out but was retarded, now it's pulling better, no knocking now. So hopefully that is it sorted.

 

Kwakerman

Well-Known Member

• Nov 23, 2013

• #8

Good news, sure it was retarded and not over advanced?

 

kes86

Active Member

• Nov 23, 2013

• #9

My mate who is a mechanic said "your Landy is retarded" I was lying underneath trying to get the timing plug into the housing at the time. Not sure if he was taking the mic

I also realised that the engine goes the opposite way to what I thought so I may have been advancing it each time, for some reason I thought that the fan pushed air forward through the rad, obviously not now I have thought about it properly.

Anyway used the proper pins now so should be spot on.