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2000 c70 new head crank no start

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Kerpre
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Year and Model: 2000 c70
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2000 c70 new head crank no start

Post by Kerpre »

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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Post by RickHaleParker »

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.
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1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.

Kerpre
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Year and Model: 2000 c70
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Post by Kerpre »

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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Year and Model: 850, V70, S60R, XC70
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Post by erikv11 »

I was going to say a tablespoon of oIl in each cylinder, you're on it though. Very common.
'95 854 T-5R, Motronic 4.4, 185k
'98 V70, T5 tune-injectors-turbo, LPT engine, 304k, daily driver
'06 S60 R, 197k
'07 XC70, black, 205k
'07 XC70, willow green, 212k
'99 Camry V6 :shock: 153k
gone: '96 NA 850 210k, '98 NA V70 182k, '98 S70 NA 225k, '96 855 NA 169k

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abscate
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Post by abscate »

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
Empty Nester
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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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simonkls
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Post by simonkls »

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scot850
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Post by scot850 »

Junk message above!
2006 V70 2.5T AWD Polestar tune
2000 V70 R - still being an endless PITA
2006 XC70 - Our son now has this and still parked in our garage
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L - Sold
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - Sold

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