Peugeot DW8 engine - interference or not?

SB118 · 27 Dec 2009 at 21:21

Just got the call, engine ran really badly for a second, won't restart.

Odds are the belt has let go, just wondering what it broke.

Is it a fixable interference (like the xud where you give it a fresh cam and a couple of followers and it's runs again) or is it terminal interference (as in it's a ****ing paperweight)?

(guess which ****head sold his spare xud n/a lump 2 months ago)

Cheers.

allllec · 27 Dec 2009 at 21:35

Might be salvageable. To be honest the XUDs are not any more or less repairable than any other engine (generally speaking) with cambelt failure. Just seems all the GTI6 guys CBA to change the cam belt on time and bodge it when it finally gives in due to cost of second hand blocks.

Afraid going to have to take the head of and see what condition the pistons/valves/valve guides/followers/cams are in.

Note that the compression ratio on those engines is stupidly high, so there is a good chance you've knackered quite a few valves/followers. But depends - might have died after 1 compression stroke. Might have have done 10 and taken the whole lot with it!

SB118 · 27 Dec 2009 at 22:07

allllec said:
Might be salvageable. To be honest the XUDs are not any more or less repairable than any other engine (generally speaking) with cambelt failure. Just seems all the GTI6 guys CBA to change the cam belt on time and bodge it when it finally gives in due to cost of second hand blocks.

The XUD is great as the valves are flat on to the piston, if the belt break the just get shoved upwards and snap the cam & followers.

If the valves are angled onto the piston you get belt valves and a world of other hassles.

But i don't know if the DW8 has flat facing valves.

allllec said:
Afraid going to have to take the head of and see what condition the pistons/valves/valve guides/followers/cams are in.

Not gonna be happening, if it's more than a mashed top end it's getting flatpacked.

allllec said:
Note that the compression ratio on those engines is stupidly high, so there is a good chance you've knackered quite a few valves/followers. But depends - might have died after 1 compression stroke. Might have have done 10 and taken the whole lot with it!

Heh, hers is a non-turbo diesel, so the compression is even higher than normal!

allllec · 27 Dec 2009 at 22:12

The pistons have 2 conjoined circle imprints on the piston. Looks a bit like a man sack

Although not sure how much difference it would make, again without seeing it with the head off!

To be honest I wouldn't sink any money into one of those engines with a cam belt failure (or any engine for that matter), you can pick them up for £100 from the breakers.

SB118 · 27 Dec 2009 at 22:15

allllec said:
The pistons have 2 conjoined circle imprints on the piston. Looks a bit like a man sack

Although not sure how much difference it would make, again without seeing it with the head off!

Depends if the impressions were flat or tappered.

allllec said:
To be honest I wouldn't sink any money into one of those engines with a cam belt failure (or any engine for that matter), you can pick them up for £100 from the breakers.

The xud motors are ten a penny, try finding a dw8 lump without paying more than the car is worth though.

allllec · 27 Dec 2009 at 22:35

SB118 said:
Depends if the impressions were flat or tappered.

The xud motors are ten a penny, try finding a dw8 lump without paying more than the car is worth though.

Couldn't tell you from memory!

Ring around you'd be surprised. Just put on ***** voice and ask for one from a van - You'll pay less

SB118 · 27 Dec 2009 at 22:48

allllec said:
Just put on ***** voice and ask for one from a van - You'll pay less

I know ebay are always overpriced but they range from 350 to 550 :eek:

Sods law ours is a parts bin special. DW8 engine in a 306 body. DW8 lived in the 206 and other newer stuff, keeps the prices up.

Dave L · 28 Dec 2009 at 21:16

DW8 and DW10 D & TD engines are quite an easy fix following belt slip/failure.

SB118 · 29 Dec 2009 at 12:30

Looks like i may be a lucky bugger

Got to look at the engine today (when the rain let up), the timing belt has teeth missing, it's slightly shredded on one side for a few inches and the pump pulley has teeth missing. Yes, you read that right, the injector pump pulley has been broken in two places! :eek:

Fearing the worst i took the rocker cover off and the cam is in one piece! It must have cut out the moment the timing went wrong. And it wouldn't restart as the battery terminal is dodgy (one of those damn stupid screw on connectors) meaning she couldn't spin it over and do any damage!

I've ordered a new pulley from the dealer, belt will be about £15, then put it back together and flog it (wife has lost faith in the car now).

Not quite the expensive new year we were dreading

Dave L · 29 Dec 2009 at 16:39

The pump pulley has teeth missing??? That's a sintered steel casting!

Could it have been damaged/weakened when the cambelt was replaced perhaps?

SB118 · 29 Dec 2009 at 16:53

Dave L said:
The pump pulley has teeth missing??? That's a sintered steel casting!

The actual backing of the pulley is only 2mm thick though, looks very weedy next to the spares i have for other pumps.

Dave L said:
Could it have been damaged/weakened when the cambelt was replaced perhaps?

Not changed the belt yet, but i was fiddling with trying to swap the pump a couple of weeks ago, i might have done something then. Can't believe how thin the metal is though, doesn't look stong enough to take the tension of the belt.

jon.bda · 29 Dec 2009 at 17:03

Think you'll have to chuck a belt on it and see mate...i'd expect bent valves though.

SB118 · 29 Dec 2009 at 17:04

That's the plan, need to wait for the new pulley to arrive first, the old one isn't round anymore!

SB118 · 31 Dec 2009 at 17:21

Hmm, think i've found the problem ...

Notice how the new unit is somewhat thicker than the original.

Got the new pulley on, got the new belt on, turned it over by hand, everything moving freely, now i need to sort the battery terminal so the bugger will turn over.

Sod it, job for next year

Dave L · 1 Jan 2010 at 10:48

That's a shocking failure, that pully looks way too thin for my liking - and compared to the new one it does look like it has been modified by Peugeot to counter this problem.

SB118 · 1 Jan 2010 at 11:23

Got out to it this morning, freshly charged battery on, started it 5/6 times (stopping it each time to tweak the pump timing), start number 7 was, "click click click".

Multimeter showing battery dropping to 10.5v with the glowplugs on and 5v when cranking. Fubar battery :mad:

Not to worry i've got a big assed high amperage transit battery at the workshop. Which is closed today. :mad:

And that's my day done :mad:

Dave L · 3 Jan 2010 at 10:44

Going yet?

SB118 · 4 Jan 2010 at 15:54

Swapped in the battery from my 406, mucho start/stop/tweak/start/etc and a few laps around the local roads and she's driven it to work this evening

Little bit of smoke when it starts up, but that clears once you pull away. (it is a 306 after all!)

Run it for a few days to make sure everything is behaving, then put it up for sale.

She's lost trust in the car.

Now it's had a full service, new aux belt, new cam belt, new pump pulley, she wants rid of it. :rolleyes:

ho hum.