- Posts
- 11,024
- Location
- North of the Wall
Presumably, before you rebuilt it
300 Tdi Rebuild
- Thread starter Al2O3
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
raywin
Well-Known Member
- Posts
- 3,808
- Location
- North Yorkshire
No, sorry it was while I was test running it, luckily I was able to clean it up completely then put it back with a smear of silicone.Presumably, before you rebuilt it
how about this, regulate the oil pressure and be done with it ??
https://www.turbosmart.com/product/opr-t40-40psi-black/
https://www.turbosmart.com/product/opr-t40-40psi-black/
steve2286w
Well-Known Member
- Posts
- 4,602
- Location
- monkeyangerland
That’s Clever
- Posts
- 11,024
- Location
- North of the Wall
how about this, regulate the oil pressure and be done with it ??
https://www.turbosmart.com/product/opr-t40-40psi-black/
Hmm, that's interesting. But, why would my Landy need one and nobody else's?
- Posts
- 11,024
- Location
- North of the Wall
Well, I got around to swapping the oil stat today.
Mine has two washers, which seal off the oil. The stat pushes them down in to the housing against that spring. The washers get pushed passed a port in the housing, which then allows the oil to flow. I wonder if they usually have two washers? I don't think many people take these out, so not many people might know. Just thinking the extra washer will make the spring slightly harder to push against as it will already be a few mm compressed.
Mine has two washers, which seal off the oil. The stat pushes them down in to the housing against that spring. The washers get pushed passed a port in the housing, which then allows the oil to flow. I wonder if they usually have two washers? I don't think many people take these out, so not many people might know. Just thinking the extra washer will make the spring slightly harder to push against as it will already be a few mm compressed.
steve2286w
Well-Known Member
- Posts
- 4,602
- Location
- monkeyangerland
- Posts
- 11,024
- Location
- North of the Wall
Excellent, thank you!
Having two on mine did make me wonder.
Again, these two washers would have been on before my engine runaway and so before the rebuild. My turbo, though old and tired, was not passing oil then.
If I take a washer out I suppose it will start allowing the oil through to the cooler slightly earlier. It might help a tad!
- Posts
- 11,024
- Location
- North of the Wall
I've tried my hand over the oil filler hole to check for excessive pressure. Felt fine. Today I thought I'd be a little more scientific
Found a kitchen waste pipe connector and taped a nitrile glove to it. Blew up nicely by mouth. Made a rubber gasket to act as a seal when I held it down on the hole.
No inflation of the glove what do ever. However, when I revved the engine it started sucking the glove in.
I'm googling negative valve cover pressure and it seems to be a good thing. Can it be too good though?
Found a kitchen waste pipe connector and taped a nitrile glove to it. Blew up nicely by mouth. Made a rubber gasket to act as a seal when I held it down on the hole.
No inflation of the glove what do ever. However, when I revved the engine it started sucking the glove in.
I'm googling negative valve cover pressure and it seems to be a good thing. Can it be too good though?
jamesmartin
Well-Known Member
- Posts
- 91,879
- Location
- louth lincs
have you a blocked or partially inletI've tried my hand over the oil filler hole to check for excessive pressure. Felt fine. Today I thought I'd be a little more scientific
View attachment 210746
Found a kitchen waste pipe connector and taped a nitrile glove to it. Blew up nicely by mouth. Made a rubber gasket to act as a seal when I held it down on the hole.
No inflation of the glove what do ever. However, when I revved the engine it started sucking the glove in.
I'm googling negative valve cover pressure and it seems to be a good thing. Can it be too good though?
- Posts
- 11,024
- Location
- North of the Wall
Do you mean the air intake, JM?
jamesmartin
Well-Known Member
- Posts
- 91,879
- Location
- louth lincs
yes
steve2286w
Well-Known Member
- Posts
- 4,602
- Location
- monkeyangerland
Hope you didn’t leave a flannel in the inlet manifold like me got sucked into no 3 port blocking air and losing compression
I had loss of power and smoke with that
got sucked into no 3 port blocking air and losing compressionI had loss of power and smoke with that
- Posts
- 11,024
- Location
- North of the Wall
Don't think so, but will invwstigate. Do you think it could be creating enough negative pressure to be sucking oil through the turbo?
- Posts
- 11,024
- Location
- North of the Wall
I hope there's nothing in there!Hope you didn’t leave a flannel in the inlet manifold like me
I had loss of power and smoke with that
- Posts
- 11,024
- Location
- North of the Wall
@jamesmartin ive not investigated intake pipe work yet as I'm tying plants up in the garden. Just wondering if vac pump might be faulty and creating the negative pressure? It'll be the original pump, so 24 years old.
jamesmartin
Well-Known Member
- Posts
- 91,879
- Location
- louth lincs
as you rev the engine the breathing system if original and working should suck harder as air and the fumes are pulled into the turbo, a blocked air filter or hose ie inner wall collapsing would greatly increase this,vac pump if there was a leak ie servo and hose would pressurise the engine ie suck air into the engine
- Posts
- 11,024
- Location
- North of the Wall
Ok, vac pump probably still ok then.
This is the air filter
Nice and clean.
However, I took the air intake pipe off the turbo inlet and repeated the test. Glove did not suck in this time!
Time to take all the pipe work off I think!
jamesmartin
Well-Known Member
- Posts
- 91,879
- Location
- louth lincs
it wouldnt do as the engine breather pipe is not under any suction
- Posts
- 11,024
- Location
- North of the Wall
But is the question, am I getting too much suction? i.e. A blockage?
