Slipped Timing Belt - Replace Head?

JamesD · Oct 23rd, 2017, 19:12

Hi Folks,

Well as of today I now have 2 broken V70's D5 in my garage

One was involved in an accident a few weeks back and is a write off, and the second purchased by a gentleman who had the misfortune to have a timing belt slip after the auxilary belt got caught up in it. Now my intention was to make up 1 working car from the parts of my old one (engine is fine in that).

I was planning to do a complete engine swap but the new V70 I just bought has recent flywheel and gearbox work so seems a pain to swap everything over, wondered if I could get away with just swapping the head from my running engine? This new car does start up and idle's ok, but it will not rev, which seems to me the valves have been bent, he assured me the timing belt had been recently replaced and re-set hoping that he would have got away without any engine damage but that does not appear to be the case.

Assuming the timing is set correctly, I would love to do a a head swap as I think it should be less work for me on my own to complete.

Welcome peoples thoughts?

MissSpentYouth · Oct 23rd, 2017, 21:59

Hi James,

The head which had the timing belt slip will have incurred damage to the casting were the hydraulic tappets sit. They basically break out of the casting usually every one. If you find one side is OK usually the exhaust side then likely the exhaust cam sprocket has rotated around the cam instead.

I have a contact in Poland who can repair both the heads and the cam shaft, he also advertises on eBay. The casting number is printed on the back of the head you will need a mirror to read it as long as these match up your good for a swap.

The pistons are rarely damaged or the valves for that matter.

Much easier to swap a head than the engine. The engine will still run albeit not rev up properly even with every single hydraulic tappet housing broken. Not recommended though as there is a ton of broken bits of aluminium casting floating around in the head.

You will need a new head gasket and a set of stretch head bolts.

If you get into trouble I am just up the road from you south of Tewkesbury, Bradford Motor Co.

regards Ben

JamesD · Oct 24th, 2017, 10:47

Thanks Ben, I will be looking to whip the head off shortly to check what the damage is. I will also check timing first to make sure that's not off. I would be really pleased to get away with a head swap and without hoisting the engine out.

JD

MissSpentYouth · Oct 25th, 2017, 20:58

Don't forget to put some sealant under the cam shaft end caps otherwise you will land up with an oil leak down the sides.

The injectors come out much easier on a hot engine, though I wouldn't run the one with the damaged head for fear of bits of ally going round the engine

regards Ben

D5meister · Oct 26th, 2017, 17:59

It may be worth dropping the sump pan to clean the mesh screen on the oil pump collector if there are many small fragments of chewed up cast alloy

I think the valves run vetically so the pistons hit IN LINE with the valve,

JamesD · Nov 16th, 2017, 14:07

Well I managed to get some time to look at this finally yesterday. First thing I did was check if the new belt had been put on correctly by the previous owner, turns out it was not...the belt was actually set to incorrect timing marks! I got a bit excited thinking that a reset of the timing may breath life back into the old girl again, but it was not too be.

Fired up lovely and idle is fine, but would not rev past 2k rpm, so I suspect unless there is another miscellaneous error the head is shot. Need to find a few hours to take it off an confirm once and for all. Missus not happy have 2 non-operational Volvo's on the drive

DieselDoNicely · Nov 18th, 2017, 07:38

Scrap the car, its not worth the money or the effort.

DDN

Tomoose · Nov 18th, 2017, 07:53

Quote:

Originally Posted by DieselDoNicely

Scrap the car, its not worth the money or the effort.

DDN

The chap has all the parts he needs other than the gasket and stretch bolts, and the ability and enthusiasm to do the work himself, why on earth would it be scrap?

Dippydog · Nov 18th, 2017, 08:06

Agree with Tomoose.The op has a spares car-so no expense other than gaskets-and the way I read it has the skills/enthusiasm to do the work himself-so again no expense other than his own time-so why scrap an otherwise[presumably]sound car?

DieselDoNicely · Nov 18th, 2017, 14:58

Because you can get running vehicles, especially Euro 3's for a price that makes fixing the serious cases not worth the time and effort.

DDN

Oct 23rd, 2017, 19:12	#1
JamesD Junior Member Last Online: Jul 15th, 2018 11:14 Join Date: May 2006 Location: Swindon	Slipped Timing Belt - Replace Head? Hi Folks, Well as of today I now have 2 broken V70's D5 in my garage One was involved in an accident a few weeks back and is a write off, and the second purchased by a gentleman who had the misfortune to have a timing belt slip after the auxilary belt got caught up in it. Now my intention was to make up 1 working car from the parts of my old one (engine is fine in that). I was planning to do a complete engine swap but the new V70 I just bought has recent flywheel and gearbox work so seems a pain to swap everything over, wondered if I could get away with just swapping the head from my running engine? This new car does start up and idle's ok, but it will not rev, which seems to me the valves have been bent, he assured me the timing belt had been recently replaced and re-set hoping that he would have got away without any engine damage but that does not appear to be the case. Assuming the timing is set correctly, I would love to do a a head swap as I think it should be less work for me on my own to complete. Welcome peoples thoughts?

Oct 23rd, 2017, 21:59	#2
MissSpentYouth Member Last Online: Oct 18th, 2022 09:26 Join Date: Jul 2016 Location: stroud	Hi James, The head which had the timing belt slip will have incurred damage to the casting were the hydraulic tappets sit. They basically break out of the casting usually every one. If you find one side is OK usually the exhaust side then likely the exhaust cam sprocket has rotated around the cam instead. I have a contact in Poland who can repair both the heads and the cam shaft, he also advertises on eBay. The casting number is printed on the back of the head you will need a mirror to read it as long as these match up your good for a swap. The pistons are rarely damaged or the valves for that matter. Much easier to swap a head than the engine. The engine will still run albeit not rev up properly even with every single hydraulic tappet housing broken. Not recommended though as there is a ton of broken bits of aluminium casting floating around in the head. You will need a new head gasket and a set of stretch head bolts. If you get into trouble I am just up the road from you south of Tewkesbury, Bradford Motor Co. regards Ben Last edited by MissSpentYouth; Oct 23rd, 2017 at 22:03.

Nov 18th, 2017, 07:38	#7
DieselDoNicely Premier Member Last Online: Apr 2nd, 2024 14:59 Join Date: Nov 2003 Location: Brecon	Scrap the car, its not worth the money or the effort. DDN __________________ 1997 850 Tdi Auto Estate 416,000 miles scrapped May 2016 2003 V70 SE D5 Auto 350,000 miles dead in the drive way 2005 V70 SE D5 Geartronic 170,000 miles 05 2005 V70 SE D5 Geartronic 205,000 miles 55 2011 V70 Lux D3 Geartronic 220,000 miles

Nov 18th, 2017, 14:58	#10
DieselDoNicely Premier Member Last Online: Apr 2nd, 2024 14:59 Join Date: Nov 2003 Location: Brecon	Because you can get running vehicles, especially Euro 3's for a price that makes fixing the serious cases not worth the time and effort. DDN __________________ 1997 850 Tdi Auto Estate 416,000 miles scrapped May 2016 2003 V70 SE D5 Auto 350,000 miles dead in the drive way 2005 V70 SE D5 Geartronic 170,000 miles 05 2005 V70 SE D5 Geartronic 205,000 miles 55 2011 V70 Lux D3 Geartronic 220,000 miles

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Oct 24th, 2017, 10:47	#3
JamesD Junior Member Last Online: Jul 15th, 2018 11:14 Join Date: May 2006 Location: Swindon	Thanks Ben, I will be looking to whip the head off shortly to check what the damage is. I will also check timing first to make sure that's not off. I would be really pleased to get away with a head swap and without hoisting the engine out. JD

Oct 25th, 2017, 20:58	#4
MissSpentYouth Member Last Online: Oct 18th, 2022 09:26 Join Date: Jul 2016 Location: stroud	Don't forget to put some sealant under the cam shaft end caps otherwise you will land up with an oil leak down the sides. The injectors come out much easier on a hot engine, though I wouldn't run the one with the damaged head for fear of bits of ally going round the engine regards Ben

Oct 26th, 2017, 17:59	#5
D5meister Premier Member Last Online: Feb 10th, 2024 19:13 Join Date: Nov 2008 Location: Huntingdon	It may be worth dropping the sump pan to clean the mesh screen on the oil pump collector if there are many small fragments of chewed up cast alloy I think the valves run vetically so the pistons hit IN LINE with the valve,

Nov 16th, 2017, 14:07	#6
JamesD Junior Member Last Online: Jul 15th, 2018 11:14 Join Date: May 2006 Location: Swindon	Well I managed to get some time to look at this finally yesterday. First thing I did was check if the new belt had been put on correctly by the previous owner, turns out it was not...the belt was actually set to incorrect timing marks! I got a bit excited thinking that a reset of the timing may breath life back into the old girl again, but it was not too be. Fired up lovely and idle is fine, but would not rev past 2k rpm, so I suspect unless there is another miscellaneous error the head is shot. Need to find a few hours to take it off an confirm once and for all. Missus not happy have 2 non-operational Volvo's on the drive

Nov 18th, 2017, 08:06	#9
Dippydog Premier Member Last Online: Today 11:05 Join Date: Jun 2016 Location: S****horpe	Agree with Tomoose.The op has a spares car-so no expense other than gaskets-and the way I read it has the skills/enthusiasm to do the work himself-so again no expense other than his own time-so why scrap an otherwise[presumably]sound car?

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