Thread: 300tdi - sudden engine knocking/ticking

Maybe shoot off a PM to rick130 re big end bearings. That's what it sounds like to me.

Sounds awfully like Big ends to me, don't run it again. Remove the sump and check it out.

Possibly another 1998 Tdi with big end faults! I wonder if you could post up pics of the shells if it IS the problem, I would be interested to see if they have delaminated, like all the other 1998 edition engines with the same fault that I have seen....

Good luck.

JC

Sounds a little like its running on three?

I feel your pain - been there done that (wow nearly 10 years ago!!!)
Spun number 1 big end bearing, thats just what it sounded like before the piston caught an edge and did the deed...
Stop running the engine get it sorted.
Hope its not fatal but it sounds like badness.
big badda boom bottom end badness????

S

Too quick Justin - scratch up another '98 eh!
BTW mine was a '95.

S

Originally Posted by roverrescue

Too quick Justin - scratch up another '98 eh!
BTW mine was a '95.

S

Yes, I am wondering if there is a conspiracy theory here, I have seen 2 broken cranks, 4 sets of big end failures,(ALL delaminated) and ALL in 1998 (WA vin) vehicles

Very puzzling

JC

Thanks for the responses guys. So it's not looking good assuming you're right. What's involved in replacing the big end bearings. Can it be done in situ without too much difficulty? Worst case - the crank needs machining too? Are parts for the job exxy?

We'd been talking about selling this thing for a while now - guess i should of acted a little sooner...

Until you pull the sump it is hard to gauge what is going on.

Mayhaps, if you have the time and inclination, pull the sump (easy just a swag of 10mm bolts after dropping the oil ) take a swag of photos and post them up for an AULRO analysis?? You may also need to pull the four big end caps ( once again easy enough)

The way it stands - you need to tow it to a mechanic for work anyways; so disabling the engine and getting a possible interweb diagnosis wont hurt the situation any?

And then we get to looksee at some tdi carnage

S

If you are going to pull the sump, it is easier with the suspension at full droop, and the sway bar needs to be disconnected to allow the sump to clear the pick up on the way out.

All the big ends can be accessed easily from then on, you can rotate the engine to remove rods 1 and 4 caps, then rotate around the remove rods 2 and 3 caps.
You will need a 14mm 12 point socket to undo them, they won't/ shouldn't be excessively tight.

Pics would be excellent

JC