Thread: My (more than usual) sluggish 300tdi

Originally Posted by libertyts

Just for future reference with this one. Flexual's issue is related to high EGT's rather than high head or water temps. Some of the suggestions, although well meaning and helpful, are a little misleading as they don't refer to the initial issue.

- Radiator: unlikely, he would have likely seen the needle hit hot if this was a problem
-Head bolts: again unlikely, other symptoms would be evident here, again a high water temp would be likely

This is obviously all my own opinion, but just thought I would point out that his issue from the outset appeared to be almost solely related to intake through to exhaust issue rather than anything else. No offence intended, just a point.

Hopefully those pretty new hoses get you sorted mate!

Chris

To put it another way - I think what you're saying is - change the hose and test drive before changing ANYTHING else...

?

Well I'm not out of the woods just yet! Hoping for a good result though

I agree with the above sentiment too, keep it simple. I think I'd becom a little overwhelmed with the list of "potential" problems.

So just a little update....

Did some work on it end of last week.

New timing belt kit (belt, gasket, pulley etc etc). The old one was was flogged. Whoever changed it last time seems to have a put the wrong pulley on - I think. It has a flange that stops the belt from coming off, this actually tore away at the belt and it was nearly ready to snap. So, all of it got replaced.

Reset tappet clearance. Some had too much, others too little.

Replaced the intercooler pipes with some silicone ones. Intercooler seemed clean enough and there was no oil or muck in the pipes but they 'feel' old.

Replaced 2 radiator hoses. We noticed a crack in one, and although it wasnt dropping water, it looked ominous. We pulled them out and found they were in terrible shape, they were basically collapsed inside, and was letting all sorts of gunk in to the cooling system - so we flushed it all out and replaced the hoses.

I have a new air intake pipe on the way. Had to order a new one from the UK so I'll fit that asap. The current one looks as if its being "sucked in".

Results so far are great. I took it up to Ballarat from Melbourne for a race (a mountain bike race) and it drove great. Was able to sit on 110 the whole way, but chose to sit on 100 and keep the revs from tipping 3k. Ran smooth, no smoke, I even over took someone going up a hill!
Whilst I've fueled up once, economy seems to be drastically improved. Previously to the work I was getting about 13-13.5L/100km, or 600-650km from an 80L tank. Im now sitting at half full with over 400km so far...

One thing I have noticed, just recently, the transmission feels pretty warm to the touch ie; the actual gear selector (1-2-3-D-R-P) where it disappears into the box. I've never really noticed it before... is that normal?

Anyway, happy so far, hopefully the air intake will show some improvement too. I'm not happy, however, with the diagnosis from AG Diesel and I'll be letting them know.

Cheers!

Sounds like some excellent results, good work!

I can't help you with the auto heat thing sorry.

Originally Posted by Flexual

So just a little update....

Did some work on it end of last week.

New timing belt kit (belt, gasket, pulley etc etc). The old one was was flogged. Whoever changed it last time seems to have a put the wrong pulley on - I think. It has a flange that stops the belt from coming off, this actually tore away at the belt and it was nearly ready to snap. So, all of it got replaced.

Reset tappet clearance. Some had too much, others too little.

Replaced the intercooler pipes with some silicone ones. Intercooler seemed clean enough and there was no oil or muck in the pipes but they 'feel' old.

Replaced 2 radiator hoses. We noticed a crack in one, and although it wasnt dropping water, it looked ominous. We pulled them out and found they were in terrible shape, they were basically collapsed inside, and was letting all sorts of gunk in to the cooling system - so we flushed it all out and replaced the hoses.

I have a new air intake pipe on the way. Had to order a new one from the UK so I'll fit that asap. The current one looks as if its being "sucked in".

Results so far are great. I took it up to Ballarat from Melbourne for a race (a mountain bike race) and it drove great. Was able to sit on 110 the whole way, but chose to sit on 100 and keep the revs from tipping 3k. Ran smooth, no smoke, I even over took someone going up a hill!
Whilst I've fueled up once, economy seems to be drastically improved. Previously to the work I was getting about 13-13.5L/100km, or 600-650km from an 80L tank. Im now sitting at half full with over 400km so far...

One thing I have noticed, just recently, the transmission feels pretty warm to the touch ie; the actual gear selector (1-2-3-D-R-P) where it disappears into the box. I've never really noticed it before... is that normal?

Anyway, happy so far, hopefully the air intake will show some improvement too. I'm not happy, however, with the diagnosis from AG Diesel and I'll be letting them know.

Cheers!

The flanged pulley is the correct upgraded part so you should have used that one, the belt tearing is probably because of the tensioner being too tight.

Originally Posted by loanrangie

The flanged pulley is the correct upgraded part so you should have used that one, the belt tearing is probably because of the tensioner being too tight.

I could be wrong but from other comments I've read I believe there are 2 types of the upgraded pulley.

1. gear with lip tacked on.
2. single piece gear / lip.

1 is the cheaper because the lip can come off - as Flexual is saying I think?? - the other is single piece and obviously can't fall apart.

I stand to be corrected though.

Correct, one is cast as one piece and the other has the lip spot welded on, either way he should have used the lipped pulley.

Yeah sorry, both pulleys have a flange. The one That was put on was solid, the old one looked tacked on. The belt was grinding against it and was wearing to the point where it was about to shred it self. It may well have been a tension issue, as the whole thing was a bit of a mess.... In any case, it's all new and running great!