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Unusual crank issue s70 after water pump, belts changed

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
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Nas
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Nas

Unusual crank issue s70 after water pump, belts changed

Post by Nas » Wed May 06, 2020 11:22 pm

98 s70 turbo T5.
Purchased $400 owner didn't want to fix water pump, timing belt, plugs etc. Drove car 20 miles. Changed pump, belt, plugs, wires and ignition coil. 2 &3x checked timing using marks and to be double sure a camshaft alignment tool. Everything checks out. Go to start cart car starter engaged pulleys turning belts turning but I'll be damned it it seems the engine itself is not turning over! Check video. 2 wks I got nothing. Any clues what's going on here. Checked relays, ignition, fuel. Nothing.
20200506_170805.mov
(13.71 MiB) Downloaded 22 times

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Ocelot
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Re: Unusual crank issue s70 after water pump, belts changed

Post by Ocelot » Thu May 07, 2020 3:58 am

You checked relays, ignition, fuel, but what did those checks come up with? Is the engine getting fuel? I'm not familiar with the ignition system of the turbocharged T5 engines, but what did you check and what are your results? Is the battery in good condition? Are you sure that the ignition components are in a good condition? Did you check the wiring in the ignition circuit? Could it be an immobiliser issue? In what condition are the spark plugs? Did you do a compression test? I know it's a groaner, but are you certain that the timing marks are correct? Just the first things that come to mind when seeing the video you posted.
'Hij die zonder zonde is, werpe de eerste steen. Ik buk wel'. Simon Carmiggelt

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Previous owned Volvo's
'96 Volvo 440 Si 1.8
'87 Volvo 340 GL 1.7
'85 Volvo 340 DL 1.4

Nas
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Nas

Re: Unusual crank issue s70 after water pump, belts changed

Post by Nas » Thu May 07, 2020 6:14 am

Appreciate your quick response Ocelot. Ignition components are all new including plugs. Battery fully charged even switched out at one point. Fuel supply and pressure good. Check relays for continuity, resistance and power load test found one bad one. Replaced it. As far as timing marks I redid that sucker three times by factory manual, I was certain I must have made a mistake but it's spot on right where it should be. First Volvo I've had and I've been excited about getting it running but this issue it's got me uncertain what to do next but it's actually kind of a challenge now.. I was unfamiliar with immobilizer issue. I also hadn't done a compression test. I'll do that next. I just researched a little and this immobilizer looks promising. I have one key and it has given me problems in the column and the key fob and alarm I have doesn't work. It could maybe be a key or security system issue. I hadn't considered that. I'll give that a go. I so appreciate you giving me some fresh eyes sir. The worst is when you have no idea what you're missing. I'll post results.

Thank you so much

Nas

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Ocelot
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Re: Unusual crank issue s70 after water pump, belts changed

Post by Ocelot » Thu May 07, 2020 9:50 am

So I've shown this clip to a buddy of mine, he's a decent mechanic and helps me out a lot. He says: either the throttle is al the way down when youre friend cranks the engine, or the timing is off. Theres just no compression.
'Hij die zonder zonde is, werpe de eerste steen. Ik buk wel'. Simon Carmiggelt

Recent car
'98 Volvo S70 2.5 10V Europa edition (Freya)
Previous owned Volvo's
'96 Volvo 440 Si 1.8
'87 Volvo 340 GL 1.7
'85 Volvo 340 DL 1.4

Nas
Posts: 4
Joined: Wed May 06, 2020 10:59 pm
Year and Model: 98 s70 turbo T5
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Nas

Re: Unusual crank issue s70 after water pump, belts changed

Post by Nas » Thu May 07, 2020 9:56 am

Ok thanks. I'll check into that also.

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erikv11
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erikv11

Re: Unusual crank issue s70 after water pump, belts changed

Post by erikv11 » Thu May 07, 2020 10:07 am

No compression. Google "lawn mower syndrome" on this site. And be sure about the timing (sounds like you are).
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: Unusual crank issue s70 after water pump, belts changed

Post by Ocelot » Sat May 09, 2020 2:01 am

Any updates Nas?
'Hij die zonder zonde is, werpe de eerste steen. Ik buk wel'. Simon Carmiggelt

Recent car
'98 Volvo S70 2.5 10V Europa edition (Freya)
Previous owned Volvo's
'96 Volvo 440 Si 1.8
'87 Volvo 340 GL 1.7
'85 Volvo 340 DL 1.4

Nas
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Joined: Wed May 06, 2020 10:59 pm
Year and Model: 98 s70 turbo T5
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Nas

Re: Unusual crank issue s70 after water pump, belts changed

Post by Nas » Sat May 09, 2020 8:42 am

I've been following through on the tips I've gotten so far I've got some eliminated. I've decided to check the fuel system. Even though I had fuel at the Schrader valve spew out when I pressed it before I was working by myself so couldn't press it while cranking. I pulled the plugs and despite all that cranking I was surprised to see no fuel on the plugs which there should have been correct? I was surprised because I could hear the pump initialize when I turn the key And that would certainly explain the lack of compression. I'm going to check the fuel system relay and fuel pump today. I saw a video last night about lawnmower syndrome but I'll check the fuel system first. Wish me luck.

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erikv11
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erikv11

Re: Unusual crank issue s70 after water pump, belts changed

Post by erikv11 » Sat May 09, 2020 9:39 am

Not sure what video you looked at but to be clear, LMS is not just flooding but the same treatments will usually fix it. See posts by jimmy57 e.g. viewtopic.php?t=61868.

Low or intermittent fuel supply doesn't lead to zero compression, and no matter what you need to address the low compression issue. It's not the fuel system.
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 286k
'06 S60 R, 167k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

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