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Old 2 Weeks Ago   #31
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Re: Relays: Fuel pump and Injection System

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Old 2 Weeks Ago   #32
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Re: Relays: Fuel pump and Injection System

Quote Originally Posted by crumbtoasty View Post
Okay so here's an update for ya. I've now replaced the timing belt and drive belt because they were looking old, and cheap. And this is what I found.. stripped around the crankshaft pulley. Additionally I can't turn the cam pulley by hand. I was worried about shearing the bolt head so I chickened out after a bit of pulling. With the new belt installed it turns the cam over though.

I'm in uncharted territory here and because I'm mucking around in my own I can't watch the engine while it's turning. I'd like to see what's happening under the cam cover when it's turning. I took the camshaft out and neither it or the followers had any wear. Are the followers meant to stay stationary or pop up? I'm worried the valves could be stuck...
The force needed to open a valve against its spring will be more than you can create trying to turn the cam by hand. So that isn't an issue.

However, the belt teeth stripped suggests that something stopped the cambelt turning. That'll be either the camshaft, or the water pump.
You've had the cam out and it looks OK, so I'm assuming its bearing surfaces are good, which suggests the cam had not seized, at any time.
With the cam out, all the followers should be about the same height, as all valves should be shut. This is a 'safe' engine, so pistons and valves don't meet. With the cam in place, and no belt, you should be able to turn the cam with a spanner and open all valves in turn.

My guess is the water pump may have seized. Don't discount this because it will turn now. It may have seized and then let go now. Cheap and easy to replace, so just do it.
Also check the cam tensioner. Did a new one come with the belt? This would not stop the belt turning, but would burn the back of the belt, but always worth changing with a new belt.
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Old 2 Weeks Ago   #33
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Re: Relays: Fuel pump and Injection System

Thanks bill.. this was my worry, I was trying to turn the cam with my ratchet and it wouldn't budge... The bearing surfaces had some crud on the inside but nothing major... the water pump is only a year old so I don't think it's that... I'll have a look again soon... how much force should it take to depress the cam follower? I feel like if I lean on it it should at least move a little bit no?
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Old 2 Weeks Ago   #34
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Re: Relays: Fuel pump and Injection System

Just leaning on the follower is unlikely to move it. With the cam in place, you shouuld be able to lever against the cam to push the follower down. But be careful, don't lever against the cam lobe, only the rough cast part of the shaft, and ensure whatever you use does no damage.
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Old 2 Weeks Ago   #35
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Re: Relays: Fuel pump and Injection System

Out of interest did the camshaft area look nice and oily when you took the cover off? Could be the spray bar along the front blocked if oil changes have been skimped on in the past leaving the camshaft running dry which will stiffen it up pretty quickly. Shouldn't really be "crud" around the cam bearings, just oil. If you've got the spray bar off along with the camshaft try and spray through with an oilcan or WD40 to see if oil comes through all the holes.
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Old 2 Weeks Ago   #36
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Re: Relays: Fuel pump and Injection System

Hi, yeah it kinda looked like oil burned onto the metal, not like dirt, but looked like stuff that gets burned onto a frying pan if you know what I mean? Cleaned it off with a bit of WD40 and a cotton rag, took a bit of scrubbing...

I did get the spray bar off and blew through it and tried to block the holes... I'm pretty sure they're good but wouldn't hurt to give it a spray.. the camshaft was definitely oily when I opened it too �� I might go try fitting a new crank sensor soon.. on night shifts so I only get like an hour to do anything during the day before I have to go back to bed
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Old 2 Weeks Ago   #37
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Re: Relays: Fuel pump and Injection System

Check there is actually oil coming up through the head. There have been instances of a head gasket fitted upside down, so the oilway is blocked. A camshaft can last a long time just on the oil it got when topped up, or last changed, as it gets a bath at that time.

Once saw a Rover V8 engine with no oilway in the head. Rocker gear only lubricated by oil from initial fill, changes and top ups. Lasted 85,000 miles before it got noisy. Only rocker gear, no camshaft, but illustrates the point.
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Old 1 Week Ago   #38
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Re: Relays: Fuel pump and Injection System

Heya

So I replaced the crank sensor, timing belt and drive belt, which produced the first 'start' for quite a while. It ran for about ten seconds and sounded like only two cylinders were firing 'sigh'...

Tappet cover off revealed that one of the valves was stuck open, removed the timing belt and turned the camshaft with my socket wrench (it turns now) which caused a further two valves to stay down. Camshaft now out, and after playing around a bit I've found that the other valves are working fine. So both valves on Cylinder 1, and the exhaust valve on Cylinder 2.

Currently have a magnet on order to get the tappets out, then I'll try to run some penetrating oil down there, get them freed up, run some de-gunking additive around for a bit and then change the oil out.

Probably easier said than done, but the 'almost start' has given me a new enthusiasm
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Old 1 Week Ago   #39
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Re: Relays: Fuel pump and Injection System

Good work.
I'm guessing it has stood around for a while before you bought it. The sticking valves will be the ones open to the atmosphere while it was stood, so have a bit of rust on their stems.
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Old 1 Week Ago   #40
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Re: Relays: Fuel pump and Injection System

Quote Originally Posted by portland_bill View Post
Good work.
I'm guessing it has stood around for a while before you bought it. The sticking valves will be the ones open to the atmosphere while it was stood, so have a bit of rust on their stems.

Brilliant don't give up now you have anew set of skills sj
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Old 1 Week Ago   #41
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Thumbs up Re: Relays: Fuel pump and Injection System

IT WORKS!!

I tried soaking the followers but the stubborn little bastards would not budge, I cleaned up what I could and was at an impass, do I take the head off or carry on as I am. I had considered heating the head but I didn't fancy setting the car on fire considering how much WD40 I'd been using.

So I just ran the car on two cylinders with the starter motor which was enough to heat the head and free up another of the valves, which took quite a while. Once the third cylinder was firing it didn't take long for the other valves to come unstuck, now its purring nicely and starts every time without hesitation

It turns out it wasn't the valves but the followers that were stuck, there was a buildup of the same 'baked on' oil or whatever on the bottom on the followers which was a real bitch to get off. The followers I managed to clean can now be taken out easily with two fingers

Tomorrow I'm going to check valve clearances and fully remove all the sludge from the camshaft casing otherwise I imagine I'll be doing all this again soon. Probably change the oil and filter asap and get her ready for an MOT this week.

Thanks to everyone who replied! It's been quite a journey!
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