IPD sale XeMODeX - Experts in Volvo Electronics

Get email notification of topic replies. Log in or register (free). Amazon Link Buy anything with this and it helps MVS!

Timing belt broke, head replacement?

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

melmaclifeform
Posts: 22
Joined: Sun Jan 13, 2019 6:45 pm
Year and Model: 1999 S70 Base
Location: North Carolina
Has thanked: 1 time

Timing belt broke, head replacement?

Post by melmaclifeform »

So, like all fantastic afternoons, I've had my timing belt break. Reading up, the worst that I've seen that could have happened to my engine is that some valves broke.

Theoretically, since the valves are in the cylinder head, could I source a good, used cylinder head and just kind of slap it in there? I've done head gaskets before with my friend on a Firebird, so I know I can remove the head.

Thoughts?
1999 S70- Currently in pieces
2000 S70 GLT SE- The car that helps keep oil prices up with the amount it leaks
2004 XC70 AWD- It's the wagon
User avatar
Clemens
Posts: 1208
Joined: Thu Sep 03, 2015 12:34 pm
Year and Model: 96 855 R + 94 855 T5
Location: Austria
Has thanked: 97 times
Been thanked: 57 times

Re: Timing belt broke, head replacement?

Post by Clemens »

yes, you could do that. it is trickier than on a firebird, though. the head gasket is a liquid one, i think you need to roll it onto the cleaned surface of the block. other than that, it is just quite a few hours of work.
if you have a 98 or 99 up, you have the variable camshafts, you need to pay extra attention to those.

most likely a few valves are bent, other than that nothing majorly should be ruined.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V
User avatar
abscate
MVS Moderator
Posts: 22576
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 377 times
Been thanked: 1182 times

Re: Timing belt broke, head replacement?

Post by abscate »

It’s a solid head gasket with anaerobic sealer between the two halves of the precision machined cam cover. A bit different than other iron but if you study up it’s pretty simple

With head off, it is worth checking the head for warpage, it’s a tight spec to acceptance
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
melmaclifeform
Posts: 22
Joined: Sun Jan 13, 2019 6:45 pm
Year and Model: 1999 S70 Base
Location: North Carolina
Has thanked: 1 time

Re: Timing belt broke, head replacement?

Post by melmaclifeform »

Ok sweet! I figured that would be the easier option than replacing the whole block or taking it somewhere to get fully remanufactured.

For the variable camshafts, I just keep them in place to keep them in line, correct?
1999 S70- Currently in pieces
2000 S70 GLT SE- The car that helps keep oil prices up with the amount it leaks
2004 XC70 AWD- It's the wagon
User avatar
SuperHerman
Posts: 1553
Joined: Mon Dec 01, 2014 1:28 pm
Year and Model: 2004 & 2016 XC90
Location: Minnesota
Been thanked: 169 times

Re: Timing belt broke, head replacement?

Post by SuperHerman »

You will need to fashion some timing tools. Not sure which engine you have , but if it has VVT you can change the cam seals on the VVT end (if you have it or them) by sliding it down the other side. Timing VVT is tricky, but plenty of do it yourselves explaining it. You need to align the cams correctly - some can do it with no tools, but the cams can walk.

You can source new valves for those bent or buy used ones. Pull the part number and see what other engines use it for used. The head is married to the cam cover - so don't go swapping.

Replace the valve stem seals while you have it off plus lap the valves. Machine it flat or measure and clean it up if it passes. I would spend the money for a planing. The rest you can do.

It is not a bad job - if you can do a Firebird you can do a Volvo. Ask questions if you get stuck. Also - do not use RTV - use anaerobic sealer as mentioned above. Available from Permatex at NAPA and other fine stores.
User avatar
BEJinFbk
Posts: 3756
Joined: Sat Jan 05, 2008 10:32 pm
Year and Model: '98 V70 R
Location: Fairbanks, Alaska
Has thanked: 25 times
Been thanked: 56 times

Re: Timing belt broke, head replacement?

Post by BEJinFbk »

IIRC, Clearwater is a good resource for white block head rebuilding.
'98 V70 R - Well Equipped for Life Up North... ;)
User avatar
Clemens
Posts: 1208
Joined: Thu Sep 03, 2015 12:34 pm
Year and Model: 96 855 R + 94 855 T5
Location: Austria
Has thanked: 97 times
Been thanked: 57 times

Re: Timing belt broke, head replacement?

Post by Clemens »

abscate wrote: Thu Jan 23, 2020 3:40 pm It’s a solid head gasket with anaerobic sealer between the two halves of the precision machined cam cover.
Thanks, right, there is a solid gasket... but there is also liquid, squishy, gooey stuff that can get messy.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V
User avatar
abscate
MVS Moderator
Posts: 22576
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 377 times
Been thanked: 1182 times

Re: Timing belt broke, head replacement?

Post by abscate »

melmaclifeform wrote: Thu Jan 23, 2020 4:36 pm Ok sweet! I figured that would be the easier option than replacing the whole block or taking it somewhere to get fully remanufactured.

For the variable camshafts, I just keep them in place to keep them in line, correct?
Your 1999 NA S70 , the very best year, will have solid cams and no VVT if it has the original engine.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
melmaclifeform
Posts: 22
Joined: Sun Jan 13, 2019 6:45 pm
Year and Model: 1999 S70 Base
Location: North Carolina
Has thanked: 1 time

Re: Timing belt broke, head replacement?

Post by melmaclifeform »

abscate wrote: Fri Jan 24, 2020 4:41 am
melmaclifeform wrote: Thu Jan 23, 2020 4:36 pm Ok sweet! I figured that would be the easier option than replacing the whole block or taking it somewhere to get fully remanufactured.

For the variable camshafts, I just keep them in place to keep them in line, correct?
Your 1999 NA S70 , the very best year, will have solid cams and no VVT if it has the original engine.
This is great news, so I don't have to make sure they stick in place? I'm just about 99% sure it's the original engine.
1999 S70- Currently in pieces
2000 S70 GLT SE- The car that helps keep oil prices up with the amount it leaks
2004 XC70 AWD- It's the wagon
User avatar
abscate
MVS Moderator
Posts: 22576
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 377 times
Been thanked: 1182 times

Re: Timing belt broke, head replacement?

Post by abscate »

Set the crankshaft to the “ clearance mark” ( which is not TDC of course) then you can reinstall the cams in any position. Once the head is back on, you do the timing belt install procedure, setting the solid cams to the marks , setup the tensioner and idler, etc.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
Post Reply
  • Similar Topics
    Replies
    Views
    Last post