1996 850 GLT Need to find vacuum leak >> found

[erikv11]

Ok just to clarify, the OEM hose routes across the turbo into the vacuum tree which is near the throttle body. You remove the 90deg elbow from the intake manifold run your own line across the front of the engine into the same port on the vacuum tree.

Correct?
Thanks

Nope.

The OEM hose routes under the intake manifold and connects to the *flame trap nipple* on the intake. I'll dig for a pic or two for you.

[erikv11]

Here is the flame trap housing out of the car and opened up. The insert with all the little holes is the flame trap. If the insert is still in your dad's car, remove it and throw it away, then just close up the housing. All it does is get clogged up. The white hose is connected to the flame trap nipple, the other end of that white hose goes to the little metal nipple on the intake manifold, the one tucked behind the power steering pump.



Here is a pic from FCP

[osmium]

Ok just to clarify, the OEM hose routes across the turbo into the vacuum tree which is near the throttle body. You remove the 90deg elbow from the intake manifold run your own line across the front of the engine into the same port on the vacuum tree.

Correct?
Thanks

Nope.

The OEM hose routes under the intake manifold and connects to the *flame trap nipple* on the intake. I'll dig for a pic or two for you.

I could have sworn I connected it to the vacuum tree. I'll have a look when I get home.

-os

[osmium]

Ok just to clarify, the OEM hose routes across the turbo into the vacuum tree which is near the throttle body. You remove the 90deg elbow from the intake manifold run your own line across the front of the engine into the same port on the vacuum tree.

Correct?
Thanks

Nope.

The OEM hose routes under the intake manifold and connects to the *flame trap nipple* on the intake. I'll dig for a pic or two for you.

Connected to the flame trap assy. Can't believe I remembered it wrong.

My apologies for giving bogus information.

-Os

I could have sworn I connected it to the vacuum tree. I'll have a look when I get home.

-os

[mecheng]

Here is the flame trap housing out of the car and opened up. The insert with all the little holes is the flame trap. If the insert is still in your dad's car, remove it and throw it away, then just close up the housing. All it does is get clogged up. The white hose is connected to the flame trap nipple, the other end of that white hose goes to the little metal nipple on the intake manifold, the one tucked behind the power steering pump.



Here is a pic from FCP

So this is located on the flexible intake pipe? Does my 98 s70 have one?
To remove the insert I assume it just pops out? How do you open it up?
Thks

[erikv11]

It is located on the non-flexible part of the cold air intake pipe on NA models. On the fixed elbow, right below the big 4 inch clamp that hooks the flexible part on.

No, your S70 T5 does not have one. But all 98 S70 NA models do. After 98 Volvo just got rid of the flame trap altogether.

The disk just pops out once you have it open.

You open it up by twisting it a few degrees then opening it, note the pin with the yellow arrow, it fits into a slot in the housing on the flexible air pipe, also marked with a yellow arrow.

And to nip an obvious follow-up question in the bud ... if your T5 doesn't have a flame trap housing, then where does the little vacuum line from the intake manifold connect to? Answer: it runs all the way to a nipple on the PTC, down where the cold air intake feeds into the turbo, see https://www.matthewsvolvosite.com/forums ... hp?t=53448.

[mecheng]

I thought I was going insane last night, I couldn't find it on my 98.

As for my Dad's 97 850 to clarify, the 97 model year the GLT was a Turbo 190hp.
Does it have the flame trap or only NAs? If he doesn't have the flame trap, I assume that vacuum line goes to the PTC valve. I've cleand the PTC on my car.

He is bringing his car by in a few days, he mumbled something about getting too old to work on cars - I think he may give it to me and buy a new car Hopefully, its in mint condition, original owner.
Then I can sell the Accord and be 100% Volvo.

thanks for being patient with all my questions.

[misha]

Turbo models don't have a flame trap.

..your S70 T5 does not have one. But all 98 S70 NA models do. After 98 Volvo just got rid of the flame trap altogether...

Quote from volvospeed.com:
Note that in 1998 Volvo stopped putting the flame trap in the housing, it came from the factory without the white plastic flame arrestor in car. This brings up the question a lot of times is it needed at all in the 1993-1997 models. I've never seen an "official" message from Volvo on this, so what happens at the dealer, if the car came with it we put it in when we do PCV maintenance. Could you leave it out, my guess is yes.

Scroll down to the end of the page:
http://volvospeed.com/volvo_repairs_how ... ement.html

[erikv11]

...
As for my Dad's 97 850 to clarify, the 97 model year the GLT was a Turbo 190hp.
Does it have the flame trap or only NAs? If he doesn't have the flame trap, I assume that vacuum line goes to the PTC valve. I've cleand the PTC on my car.
...

I was going by the thread title, it says 1996 GLT. Didn't realize you were talking about a different car, my bad.

The GLTs were NA in 96 and earlier, then LPT for 97+.

[mecheng]

I tackled this problem last night, I had a bad feeling it would be a bitch and I was right; even though it looks easy.

First thing I did was remove the upper radiator hose to get access to the elbow. I was able to remove the elbow with a angled needle nose pliers on the manifold side. The other end of the elbow was stuck to the hose. I hosed it down with Liquid Wrench and after about 20 mins of trying to pull it off it finally came apart slowly in pieces because it was so brittle.

I tried installing the new elbow; well there was a lot of swear words. I felt like punching the sweedish engineer who designed this hose system. Getting the elbow onto the intake manifold was a bit tricky but I was able to do it. Getting the other end of the elbow onto the hose is virtually impossible because it is a tight fit and you need to find a way to hold the hose and push against it. Good luck, there is no room. Maybe with two people, but I'm doubtful.

So I caved and ran a new line to the PTC valve. I'm not 100% sure I connected it to the right port but I believe I followed the line correctly (not easy to do because it is hidden).

Does this appear correct, see Red arrow.