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2000 c70 new head crank no start

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
1997 - 2000 V70-XC
1997 - 2004 C70

Kerpre
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2000 c70 new head crank no start

Post by Kerpre » Mon Feb 18, 2019 6:03 pm

Hey guys I recently brought a 2000 c70 with a suspected blown head gasket.

Turns out the head was warped and needed to be replaced.
Have now replaced the head and reassembled it all.

Cam/crank timing is perfect.

Car will crank over and oil light goes out.
It has spark at all plugs
I’m sure it has fuel pressure as I press the valve on the fuel rail and fuel squirts out.
Fairly sure it has compression as the starter seems to be working normally with spark plugs in.

Any help would be greatly appreciated!

Kerry



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RickHaleParker
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Re: 2000 c70 new head crank no start

Post by RickHaleParker » Mon Feb 18, 2019 7:54 pm

Try this: Disconnect the camshaft position sensor(s) and see if you can get it to fire up on lookup tables.

The ECM has some Artificial Intelligence which maybe expecting the previous conditions. Disconnecting the camshaft position sensor(s) forces the AI to use the lookup tables and reevaluate the conditions.

It may require extended cranking to get the engine to fire on the lookup tables. However, if you succeed, you will be able to reconnect the camshaft position sensor(s) and thereafter it will fire right up.


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
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1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

Kerpre
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Re: 2000 c70 new head crank no start

Post by Kerpre » Mon Feb 18, 2019 8:35 pm

Ok I’ll do this after I try the oil in cylinder truck, god I hope I get this car going



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erikv11
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Re: 2000 c70 new head crank no start

Post by erikv11 » Mon Feb 18, 2019 8:51 pm

I was going to say a tablespoon of oIl in each cylinder, you're on it though. Very common.


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: 2000 c70 new head crank no start

Post by abscate » Tue Feb 19, 2019 2:01 am

The fuel pressure has to be at 50 psi, not just a squirt, so get a gauge in it and rule out fuel pump relay, fuel pump with a diagnostic. You can also give it a shot of ether, or starter fluid,nor three seconds to see Ifor breathes fire


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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW

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