[Solved: swirl butterflies] What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?

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[Solved: swirl butterflies] What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Christophe » 30/03/23, 14:12

I noticed a small oil leak on the cylinder head of my old 1.9 km saab TiD 280, the leak is located behind the glow plugs (passenger compartment side) on a plastic stud...

This engine is an Opel / Fiat base...and there are 4 studs and they are connected by a kind of strip (about 5 mm wide) which can rotate according to its largest dimension (free movement about 30°. ..)??

There is a hole in the center of the strap but nothing is connected to it (maybe something is missing?)

In the photo it looks like this:

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I have no idea of ​​their usefulness or the strap? What is the function of these studs and their connection?

Is it serious doctor Macro? Does it change? Easily ?

ps: I connected the OBD this morning, I have no engine fault...
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by phil59 » 30/03/23, 15:10

No idea, never seen that...

If it was a suitcase, I would have said handle. : Arrow:

Looks like a year ago on it, 22?
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Macro » 30/03/23, 17:02

I think it's the swirl butterflies
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by GuyGadeboisTheBack » 30/03/23, 17:13

Do we ever know:
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Flytox » 30/03/23, 18:09

The swirl is a kind of piloted butterfly that creates turbulence at low revs "like" (better than) a VSLA. On some engines, the EGR valve and breather take care of screwing it all up under a mountain of greasy gunk so that it ends up getting stuck in an intermediate position. The butterfly shafts may have forced / worn their housing until leaking / drooling.
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Christophe » 30/03/23, 19:17

Macro wrote:I think it's the swirl butterflies


My last engine lessons are very far (not sure to have heard this term)... in French what does it give?
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Christophe » 30/03/23, 19:18

Flytox wrote:The swirl is a kind of piloted butterfly that creates turbulence at low revs "like" (better than) a VSLA. On some engines, the EGR valve and breather take care of screwing it all up under a mountain of greasy gunk so that it ends up getting stuck in an intermediate position. The butterfly shafts may have forced / worn their housing until leaking / drooling.


Uh ok I understand better except that there is (more?) no control on it?
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Christophe » 30/03/23, 19:20

GuyGadeboisLeRetour wrote:Do we ever know:


It actually looks like this! I'll watch the full video tomorrow...
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Macro » 30/03/23, 22:09

I am in the process of redoing a 2.5 tfsi audi block that has broken down because of this... A screw that held a butterfly screwed down and caused mayhem in a cylinder...
Screenshot_20230329_210315_com.google.android.apps.photos.jpg
Screenshot_20230329_210326_com.google.android.apps.photos.jpg
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Re: What's that on a 1.9 TiD Saab engine (small oil leak on the cylinder head)?




by Macro » 30/03/23, 22:12

MmsCamera_2023-03-29-21-00-44.jpg
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MmsCamera_2023-03-29-21-00-21.jpg (244.65 KiB) Viewed 1206 times
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