displaying posts 1 to 17 of 17

Author Subject: Snapped cambelt, couple of repair questions
daryl357

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Location: London

Registered: 02 Dec 2010

Posts: 117

Status: Offline

Post #1
The belt snapped on my car at the beginning of the week so. I've started to strip the engine down.

I'm stuck trying lift the head off, everything is unbolted and I can move it around but the exhaust manifold is in the way no matter what I do. Does it have to be unbolted?

And how do you know if the bottom pulley is worn out? The rubber bonding is looking tired.

Any help would be great.
Posted 17th Jul 2011 at 00:31
bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #2
Take the manifold off the head bud

Posted 17th Jul 2011 at 00:36
bigbadbowen

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Post #3
And just put a new pulley on regardless ? its hardly a big expense considering the cost of a second rebuild if it has slipped.
Posted 17th Jul 2011 at 00:37
daryl357

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Location: London

Registered: 02 Dec 2010

Posts: 117

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Post #4
Right that's Sunday planned out then.

Any advice on checking the valve guides? A co worker suggested I just run a known good valve up it but Im not sure.
Posted 17th Jul 2011 at 00:49
daryl357

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Registered: 02 Dec 2010

Posts: 117

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Post #5
Adding to the mystery it looks like I have adjustable cam pulleys?



Looking at other people's pictures thats not right?
Posted 17th Jul 2011 at 03:52
cooper666

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Location: doncaster

Registered: 27 Nov 2009

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Post #6
adjustable as standard mate

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Posted 17th Jul 2011 at 03:57
cwspellowe

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Location: Calderbank

Registered: 19 Jul 2009

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Post #7
+1

Early cars had the 3-bolt pulleys as standard, later cars used one bolt designs

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Posted 17th Jul 2011 at 04:37
dangti6

aka JKshooter

Location: Taunton, Somerset

Registered: 15 Jun 2006

Posts: 10,305

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Post #8
Clean snap!

How many valves are gone? I had a slip and 8 were hit

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  • Posted 17th Jul 2011 at 04:57
    paul_13

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    Location: Reading

    Registered: 10 Dec 2008

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    Post #9
    Don't tighten the bolt beyond the recommended torque, I found out why but got away with it.
    I'd get some later style pulleys while your at it.

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    Posted 17th Jul 2011 at 04:58
    daryl357

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    Location: London

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    Post #10
    Mystery solved then. I'm still battling with head, once the exhaust manifold is off I shall grab some pictures. Could see at least 4 bent inlet ones.
    Posted 17th Jul 2011 at 05:04
    aphyx

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    Location: Castle Cary

    Registered: 26 Feb 2010

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    Post #11
    Sad news mate, if you need a hand with anything let me know, you have my number.

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    Posted 17th Jul 2011 at 05:20
    paulvancraen

    Junior User

    Location: Breda

    Registered: 24 Jun 2009

    Posts: 83

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    Post #12
    Like paul said, get some phase2 type campulleys. The phase1 pulleys tend to break...
    Posted 17th Jul 2011 at 23:02
    daryl357

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    Location: London

    Registered: 02 Dec 2010

    Posts: 117

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    Post #13
    Well here are some pictures from todays progress!

    Got the head off and out with the manifold intact, took 3 of us and I had to bolt the lower engine mount so I could shift it back.



    Crank pulley and slippped timing pin hole? Engine was a tapper before the cambelt snapped so thats prehaps why.



    Bores still showing the honing marks.



    Think I counted 10 bent valves?



    3 of the pistons had valve dents as well as the standard cut outs.

    Taking the head to a machine shop tommrow and getting a quote. I may still just replace the engine.
    Posted 18th Jul 2011 at 00:48
    dangti6

    aka JKshooter

    Location: Taunton, Somerset

    Registered: 15 Jun 2006

    Posts: 10,305

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    Post #14
    That crank pulley has seriously slipped.

    Your bores are alright. Those piston dents are quite severe. Your mate aphyx had a block off me that was a cambelt failure victim, but the valves were just inlet and the dents were luckily on the edge.

    Did you use a crowbar or simular to pop the head off? Looks like you have damaged the surface from the pic.

    As you know the offer of the engine is here, be interesting to hear what the machine shop comes back with for a quote. Headgasket set isn't cheap either.

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  • Posted 18th Jul 2011 at 01:02
    daryl357

    Regular

    Location: London

    Registered: 02 Dec 2010

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    Post #15
    Yes I was a bit brutal getting the head off, having the exhaust manifold in the way did not help. Was hoping that would come out with a light skim.

    I too was surprised by the gasket cost, even ecp want 60 quid just for the headgasket.

    This whole thing has been a bit of a pain really and unexpected cause I have service history showing that the cambelt was changed just over 17K ago in 2010. God knows how they timed it up.
    Posted 18th Jul 2011 at 01:52
    dangti6

    aka JKshooter

    Location: Taunton, Somerset

    Registered: 15 Jun 2006

    Posts: 10,305

    Status: Offline

    Post #16
    The slipped one I had was done less than a year ago and only a few thousand miles. Looked like it was done too tight and the belt wore away one side. A slither of belt came off and got caught.

    I have later pulleys if you want them.

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  • Posted 18th Jul 2011 at 02:22
    pugjim

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    Location: Sheffield

    Registered: 11 Mar 2007

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    Post #17
    I would be changing all those valves, especially if you dont have access to the proper equipment to measure them for run out. It doesnt look like that head has been skimmed before to me. It should be ok after a skim but your machine shop will be able to tell you for sure.

    Your best off getting the complete head gasket set from euro car parts. It is quite expensive but it has all the gaskets and seals you need for a complete head rebuild. Valve stem seals will also be in the gasket set, it would be rude not to do them while you have the head off and stripped down. I cant remember the name of the gasket set from ECP but its is of very good quality.

    Also get a complete timing belt kit with tensioner and idler pulley and put a new water pump on while your there.

    Be very careful with the head when the new valves are in, any slight knock and they can get bent very easily. Before you put the head on line up the timing pins but do not rotate the cams as this can easily bend valves too (inlet and exhaust valves may touch each other). When you put the cams back into the head make sure they are are as close to the timing pin holes so you dont have to rotate them.

    Posted 18th Jul 2011 at 02:34

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