Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[JamesV6CDX]

I'm surprised at how easy it was to do. I have removed all the 16 valves,
collets, springs, etc. I also managed to remove the stem seals, with my long nosed pliers.

All the guides feel OK. Next job, is a thorough clean of everything, and prime of all the followers. I
Think I may have one duff follower, and one lost collet, but that's no big deal.

Then I can start on reassembly, when I get all the bits. I'm not at all worried about putting
it all together - apart from getting the collets back on - they are in 2 halves, and look VERY
fiddly to get back on - is there any knack to it or any tips?

Sorry for the crap pics, this is the only camera I've got here at the mo. When I've
sucesfully done this, I will write a complete guide, and will take pics with a better camera!

PS - I'm still waiting for her to see the dining room table  

[Taxi_Driver]

Making good progress there James  

Have you discovered whats wrong with petrol injector no3?

[JamesV6CDX]

Making good progress there James  

Have you discovered whats wrong with petrol injector no3?

Not yet - I'll tackle that when the engine's back together

Personally I reckon there won't be a problem with that injector itself.... I think the hole in the valve is the cause of all evils, I think it started off very small, generating the missfire on petrol.. and got worse....

Remember, when the car was running on 3, even with that shagged valve... it was much better on LPG than petrol..

To be honest, it's only going to be run on LPG anyway, cause I'm a tightwad

[Marks DTM Calib]

Find that collet, you dont want it trapped in the head somewhere.

Give the face of the head a good clean, I use a stanley knife blade at an accute angle to remove old gasket then pinch one the wives green scourers to clean it up well.

As for the collets, get a small flat blade screwdriver and magnetise the end using a speaker voice coil or other big magnet.....place a dab of grease on the insde radius of the collet, pop it on the end of the screw driver and insert it on the valve.

The grease should make it stick to the machined grooves.

[Taxi_Driver]

Making good progress there James  

Have you discovered whats wrong with petrol injector no3?

Not yet - I'll tackle that when the engine's back together

Personally I reckon there won't be a problem with that injector itself.... I think the hole in the valve is the cause of all evils, I think it started off very small, generating the missfire on petrol.. and got worse....

Remember, when the car was running on 3, even with that shagged valve... it was much better on LPG than petrol..

To be honest, it's only going to be run on LPG anyway, cause I'm a tightwad

Its definately got an injector problem.......remember the ecu was complaining of No3 injector open. But could just be a loom fault somewhere i guess.

[Kevin Wood]

Wasn't the no.3 injector fault code electrical (i.e. injector low / high resistance)?

I'd at least measure the resistance of each injector coil and ensure they are the same. It could just be that no.3 injector was on its' way out and getting lazy, no. 3 cylinder ran lean when on petrol as a result hence poor running on petrol, OK on gas. Then the lean running killed the valve and poor(!) running on both LPG and petrol henceforth.

It'd be a shame to bu66er an newly rebuilt head due to the lean running not being sorted  

In fact, while you've got the head off it's an ideal time to get the injectors cleaned and flow tested.

Kevin

[Taxi_Driver]

Wasn't the no.3 injector fault code electrical (i.e. injector low / high resistance)?

I'd at least measure the resistance of each injector coil and ensure they are the same. It could just be that no.3 injector was on its' way out and getting lazy, no. 3 cylinder ran lean when on petrol as a result hence poor running on petrol, OK on gas. Then the lean running killed the valve and poor(!) running on both LPG and petrol henceforth.

It'd be a shame to bu66er an newly rebuilt head due to the lean running not being sorted  

In fact, while you've got the head off it's an ideal time to get the injectors cleaned and flow tested.

Kevin

I carnt remember the code, but it was 'cyl3 injector open' which i assume is saying the injector is open circuit, so yes electrical.......and was defo running on 3 cylinders on petrol before the valve broke.

[JamesV6CDX]

Having said that... if it was run 100% on LPG (apart from starting) I wonder if it would be that big an issue...

I WILL investigate the poor petrol running though, once the engine is back together.

Although, thinking about it, I seem to remember that the plug to injector 3 and 4 didn't need "persuading off" like the other 3 did, when I stripped it.

I'll get it back together, and take it from there.

I've just spent all afternoon cleaning the head, and all the surfaces, using lots of solvent, followed by a pressure washer, and a blow out with the compressed air... it looks like a show head!!! On to the followers next....

[smoothomega]

Having said that... if it was run 100% on LPG (apart from starting) I wonder if it would be that big an issue...

I WILL investigate the poor petrol running though, once the engine is back together.

Although, thinking about it, I seem to remember that the plug to injector 3 and 4 didn't need "persuading off" like the other 3 did, when I stripped it.

I'll get it back together, and take it from there.

I've just spent all afternoon cleaning the head, and all the surfaces, using lots of solvent, followed by a pressure washer, and a blow out with the compressed air... it looks like a show head!!! On to the followers next....

Is this a new 5 cylinder vauxhall type engine then  

[JamesV6CDX]

Having said that... if it was run 100% on LPG (apart from starting) I wonder if it would be that big an issue...

I WILL investigate the poor petrol running though, once the engine is back together.

Although, thinking about it, I seem to remember that the plug to injector 3 and 4 didn't need "persuading off" like the other 3 did, when I stripped it.

I'll get it back together, and take it from there.

I've just spent all afternoon cleaning the head, and all the surfaces, using lots of solvent, followed by a pressure washer, and a blow out with the compressed air... it looks like a show head!!! On to the followers next....

Is this a new 5 cylinder vauxhall type engine then  

That was meant to be a 2

[Kevin Wood]

A loose injector plug would be a nice easy fix.  

If it still plays up just get an injector from a scrapper. I've had plenty of good injectors from the scrap yard. as long as the car hasn't been sitting for months with old fuel in it. If it's not perfect it'll only have to run on it during warmup as you say.

Kevin

[JamesV6CDX]

A loose injector plug would be a nice easy fix.  

If it still plays up just get an injector from a scrapper. I've had plenty of good injectors from the scrap yard. as long as the car hasn't been sitting for months with old fuel in it. If it's not perfect it'll only have to run on it during warmup as you say.

Kevin

Cheers Kev

Even on a cold morning, it switches over to gas within a couple of seconds..

[TheBoy]

A loose injector plug would be a nice easy fix.  

If it still plays up just get an injector from a scrapper. I've had plenty of good injectors from the scrap yard. as long as the car hasn't been sitting for months with old fuel in it. If it's not perfect it'll only have to run on it during warmup as you say.

Kevin

Cheers Kev

Even on a cold morning, it switches over to gas within a couple of seconds..

I thought the coolant was supposed to reach 40+ degrees before switch over?

[JamesV6CDX]

A loose injector plug would be a nice easy fix.  

If it still plays up just get an injector from a scrapper. I've had plenty of good injectors from the scrap yard. as long as the car hasn't been sitting for months with old fuel in it. If it's not perfect it'll only have to run on it during warmup as you say.

Kevin

Cheers Kev

Even on a cold morning, it switches over to gas within a couple of seconds..

I thought the coolant was supposed to reach 40+ degrees before switch over?

Coolant should be hot - it shouldn't b on LPG from dead cold...

As soon as I sort the petrol injector prob, I will run it up to temp on petrol before switching..