Collected - 1987 Volvo 740 GL

22,550 · January 14

49 minutes ago, DirtyDaily said:

If you've not done the flame trap do that ASAP. They push the seals out constantly as a result of excess crank pressure. You could feasibly replace that and all the oil leaks will sort themselves out. Ask me how I know.

Yeah, will look at that. Ta. Hopefully the weather doesn't get too bad here to allow me to work on it outside. Had a good break this weekend.

22,550 · January 19

Righto, the weather looks mostly bearable tomorrow so I'm gonna go out and tackle this.

I suspect that the culprit for the oil leak is the crankshaft pulley seal. When I put it in, I'm sure it went a lot further back than the one I took out, which I thought was odd at the time but there was no way of me getting it out again without damaging it and I didn't have another, so it all went back together.

Has anyone else had this on any vehicle? I assumed (probably wrongly) that you'd push it back until it was seated on something?

Looking online at vids you can see that the ones people are putting in are pretty flush:

So this time I'm just gonna lob the new one in about that far and leave it with a gap behind it?

3,726 · January 19

10 minutes ago, HillmanImp said:

I assumed (probably wrongly) that you'd push it back until it was seated on something?

Not necessarily - sometimes there is a seating behind, but often it just fits into a parallel hole. Should be fine if you fit it flush with the surface.

22,550 · January 19

Thanks.

I might take it to bits and it could be from one of the other two but I suspect it's this one. Will have a look and see.

I've got to wrestle off the pulse air system first though to get to the PCV and flame trap, which is gonna eat into my time a bit but hopefully I can get it all done.

24,054 · January 19

I can’t remember the front seal on mine going too far back. When it went in, it just seemed to ‘fit’ and that was that. Definitely flush at the front though.

Good luck👍

10,243 · January 19

2 hours ago, HillmanImp said:

Righto, the weather looks mostly bearable tomorrow so I'm gonna go out and tackle this.

I suspect that the culprit for the oil leak is the crankshaft pulley seal. When I put it in, I'm sure it went a lot further back than the one I took out, which I thought was odd at the time but there was no way of me getting it out again without damaging it and I didn't have another, so it all went back together.

Has anyone else had this on any vehicle? I assumed (probably wrongly) that you'd push it back until it was seated on something?

Looking online at vids you can see that the ones people are putting in are pretty flush:

So this time I'm just gonna lob the new one in about that far and leave it with a gap behind it?

As long as the inner diameter is sat fully on the surface its supposed to be sealing its fine. The OD is what's holding the seal in, the ID is doing the sealing. As long as the OD is fully in the housing and the ID is fully on the land it seals it doesn't really matter from that point.

Lovely car as well.

22,550 · January 29

Right, update time.

Saturday before last, I managed to get to the oil separator and flame trap. Bit of a pain as its stuck behind the pulse air system which needed removing first.

Once out, was very simple to replace with the whole new set I'd ordered as opposed to cleaning the old one.

The one on there was metal as opposed to plastic like the new one.

Put it all back together and the car ran okay. Result.

So that's one worry out of the way, so I then took the front to bits to sort out the oil leak.

Looking at all the oil, it wasn't apparent where the leak was from so I replaced the two top seals and then went to do the crank seal which is the one that I suspected was the issue as it had moved further back than expected when putting it in.

2 hours later and a variety of bent tools it still wasn't coming out and my enthusiasm was well and truly gone.

Screwdrivers wouldn't do it, I tried putting some decking screws in, no joy, used some dental tools for scraping plaque that I found in a drawer buy they just bent. Nothing would get it out.

Looked at one of these:

But the seal would've been too far in to get at it.

Messaged Volksy for any hints and tips and he suggested I get one of these:

So one was ordered and the car was lobbed sort of back together waiting for the weather to clear to give it a go.

This Saturday, the weather was nice so got up, put my new tool together and the oil seal came out in seconds.

Halle-fucking-lujah.

So the new seal was lobbed in, everything was cleaned up ready to be put back together.

Volksy came ovet to drop off some oil and to do some work on the BIG, although part of the reason was probably to just check what I was doing to avoid me bothering him again.

Started getting it sort of together, ran it, took it apart again, no sign of oil leaks.

Result.

Started putting it back together again, tightened one of the pulleys before releasing the tensioner and the belt slipped, so had to re time it.

So put it all together again and fired it up.

Was working fine. Took it for a short drive to the pub.

No oil leak.

Came back out of the pub.

No oil leak.

Drove back via the shop

No oil leak. Also no rear n/s indicator.

Okay, think I can relax.

Yesterday, I popped to Halfrauds for a bulb. They were selling off their bulb kits for £2 each. Bought a few, replaced the indicator bulb got home and lifted the boot floor and found all this.

Including 3 cambelts, fan and ps belts, lots of bulbs, Haynes BoL, which I'd bought myself in the last few weeks. If I'd looked here before it would've saved me a few quid. 😂

So the car is now running...... however it's now not idling right.

Idle is fine when I start and I assume its on choke but when driving and pulling up to a junction its on the verge of stalling.

Gonna start looking at the pulse air again and oil separator again in case something isn't right before I look at other things that could be causing it.

Any obvious suggestions appreciated before I start adjusting it normally. I don't want to adjust the idle and upset a balance if its something else as it was fine before.

2,631 · January 29

Do these have the IAC? Idle air control valve

Believe these need cleaning every now and then. Glad your leaks are sorted!

19,402 · January 29

There is a micro switch that is activated when you pull the throttle which could be stuck or dead. Essentially just tells the car if it's at idle or not.

It's over by the big round throttle linkage thing.

22,550 · January 29

Ta chaps, will check them before I start effing around with anything. Didn't get a chance to go out today as it was royally pissing down but will have a go tomorrow if I can.

22,550 · February 22

On 29/01/2024 at 11:28, captain_70s said:

There is a micro switch that is activated when you pull the throttle which could be stuck or dead. Essentially just tells the car if it's at idle or not.

It's over by the big round throttle linkage thing.

I cleaned this up but its still not idling right. Might buy another just in case its bolloxed.

On 29/01/2024 at 10:15, DirtyDaily said:

Do these have the IAC? Idle air control valve

Believe these need cleaning every now and then. Glad your leaks are sorted!

I can't find one of these. So I'm saying no, but it might be that I can't find it.

The rough idling was bothering me though, just in case the belt had slipped or something putting it back together so took it all to bits again.

Cam pulley.

Lines up

Crank pulley

Lines up

Other pulley.

Oh. Its a tooth out.

Looked okay looking down from the top of the engine when I was when putting it on, took putting my phone down and taking a photo to see.

So took the belt off again and put it on right.

Lobbed it all back together.

No difference. Cars still not quite right.

Runs okay but just a little off on idle.

What does the 'other pulley' do? I've not done anything untoward by having it a tooth out have I?

My next step is to redo the oil sepatator as thats the other thing I changed when doing the belt. Have I seated it a bit oddly or something? Might clean the old one and put that back on.

Obviously means taking off the fucking pulse air again. That needs to go sooner than later methinks.

2,631 · February 23

My other guesses then for the rough idle:
Can't remember if it's a carb or injector system you have on this? If it's carb does it need cleaning and similar for the injectors. May be worth seeing the spray pattern on the injectors and throwing some snake oil through them.
Smoke test for leaks on inlet manifold etc.
Timing, see where that is.
It's a red block Volvo and whilst incredible they do run like a bucket of spanners being shaken.
Hopefully you get it sorted!

22,550 · February 24

On 23/02/2024 at 07:17, DirtyDaily said:

My other guesses then for the rough idle:
Can't remember if it's a carb or injector system you have on this? If it's carb does it need cleaning and similar for the injectors. May be worth seeing the spray pattern on the injectors and throwing some snake oil through them.
Smoke test for leaks on inlet manifold etc.
Timing, see where that is.
It's a red block Volvo and whilst incredible they do run like a bucket of spanners being shaken.
Hopefully you get it sorted!

Its a carb. A pierburg one......

Regarding the timing, I guess its a sensor on this as its a fixed distributor, so might be worth checking that in due course.

I'll try and get a look at it during the week to redo the pcv before looking at the other stuff.

A mate is off to a 1980s themed party today so he's borrowing it, as whats more 1980s than a Volvo estate.

22,550 · February 24

He's been sending me updates of the Volvos day out.

At a riding school.

Getting animal feed.

2,631 · February 24

Missing my old Volvo now...

22,550 · February 24

54 minutes ago, DirtyDaily said:

Missing my old Volvo now...

22,256 · February 24

2 hours ago, HillmanImp said:

Hope he will clean it afterwards

22,550 · June 30

This has been steadily plodding along on daily duty for the last few months. Not much to report really.

The intermittent hesitation at idle turned out to be a rusty plug lead.

How it became rusty might be a bigger issue but I've just been putting up with it for now, will see how the new one gets on.

It has a bit of trouble idling on startup though. Takes a 15 seconds to get to a point that it can drive off. After that its fine.

Its possibly the switch next to the carb mentioned earlier on here. Might look at that next but its no biggie at the mo, one to sort.

But before I do, I've no idea what this thing is hanging underneath, behind the fuel tank.

Its absolutely fucked like, whatever it is and don't think it's just become fucked, its been fucked for a while so doubt its the cause of any sudden problems. Its not near enough to the exhaust to plug into it, as thought it might be something to do with the pulse air but I'm just not sure.

I can't see where the pipes from it go from my slightly awkward position under the car.

Probably something obvious but looking at it just now I'm a bit stuck. With the lack of anything for it to plug into, is it maybe a breather pipe? Whatever it is, how important is this to sort out or can I ignore it for now or is it deadly?

19,402 · June 30

Is it electrical? Speedo sensor that plugs into the diff?

Too old for any exhaust based sensors I believe.

22,550 · June 30

22 minutes ago, captain_70s said:

Is it electrical? Speedo sensor that plugs into the diff?

Too old for any exhaust based sensors I believe.

No, its a pipe. Its actually broken further up so can't be expected to move much.

7,277 · June 30

Tank breather pipe? #6, #15 and #16 look like yours?

link here

If it is then (ideally) you just need to get as far up as the break nearest the tank and make sure the pipe from there > tank is not blocked (bit plastic pipe over the broken end and 'suck it and see' ). If it's clear and you get a nice taste of petrol then up to you if you just let it vent at the break point or slip an extension of old fuel hose on and tie it on near that bottom clip with a cable tie.
If #16 is not a one way valve (parts diagram says 'funnel') then I'd run without it - pull your end (ooh-err) and see what you have there.

22,550 · June 30

Yeah, that does look kind of right that doesn't it.

Might get under again during the week and take a proper look.

Thanks.

22,550 · July 11

Not had a chance to look at that pipe yet. Don't think its causing any grief right now so can wait.

Have been to collect some parts that the guy who was looking after the last owners estate had found when clearing out his house.

One of the items was this.

With a diary of all the stuff he'd done to it.

With diagrams.

And cutouts of the boxes from the parts he'd used in the back.

4,487 · July 11

Would you like this?

13,279 · July 11

5 hours ago, HillmanImp said:

If I am reading this right, it had FOUR new exhaust systems in eleven years?!?!

22,550 · July 11

15 minutes ago, MorrisItalSLX said:

If I am reading this right, it had FOUR new exhaust systems in eleven years?!?!

Thats just the first page.

I've got another nearly a full new exhaust system in the garage too that I got when I bought the car. 😂

22,550 · July 11

3 hours ago, Tenmil Socket said:

Would you like this?

How much? I've got a couple of leafs left on my new 'Owner information' folder. It'll go well with it.

4,487 · July 12

8 hours ago, HillmanImp said:

How much? I've got a couple of leafs left on my new 'Owner information' folder. It'll go well with it.

£free

22,550 · July 12

29 minutes ago, Tenmil Socket said:

£free

Thats my kind of price. 😂

Thats really cool, thanks.

4,487 · July 12

3 hours ago, HillmanImp said:

Thats my kind of price. 😂

Thats really cool, thanks.

PM your address 👍🏻

Collected - 1987 Volvo 740 GL

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