Author Topic: Boris' G40 ** Engine still not right **  (Read 8793 times)

Offline Boris

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Boris' G40 ** Engine still not right **
« on: May 15, 2011, 08:04:41 pm »
Hi everyone, joined the forum recently.  Heres the G40 I bought as a non runner:



Has low compression on cylinders one and four, which I was sure was down to an incorrectly fitted head gasket.  The cylinder head had been done just before I bought the car.  So I got to work replacing it:









G-lader was looking a bit beat up


So gave it a wee spruce up



Removed head



As you can see, lots of action on cylinders two and three, not so much on cylinders one and four.
So I've replaced the head gasket (thought I'd taken a photo of the two of them together, but doesn't seem to have saved.  Oh well)

Head back on and camshaft refitted


Mostly rebuilt.


As it turns out, the problem persisted.

Did a pressure test yesterday:

Before:
Cyl 1: 6 bar
Cyl 2: 13
Cyl 3: 12
Cyl 4: 9

After adding some oil to cyl's 1 and 4:
Cyl 1: 9
Cyl 2: 13
Cyl 3: 12
Cyl 4: 11

Confirmed what I suspected in that the cylinder rings are knackered. Also, listening to the engine, it seems the big end bearings may also be damaged.

Luckily, I managed to source a replacement bottom end from cheddarcheese on here. So stripped the engine again today, this time down to the bare block ready for the swapover. Just waiting for the block to arrive which should be on Tues.
« Last Edit: July 26, 2011, 07:40:42 pm by Boris »

Offline Jezza-7

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Re: Boris' G40
« Reply #1 on: May 16, 2011, 08:44:12 pm »
Charger looks nice. Were did you get that green screen wash from?

Offline Boris

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Re: Boris' G40
« Reply #2 on: May 16, 2011, 10:16:40 pm »
I'm not sure about how the charger turned out, a little too bling for my liking, will probably redo it a more suble shade or strip the paint off it and polish it. 

Don't know where the screen wash is from to be honest, it was in when I bought the car.  :D

Offline gavin.starr

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Re: Boris' G40
« Reply #3 on: May 16, 2011, 11:05:53 pm »
looks like halfords screen wash that. Ive got some in mine. Whilst i had it off the car it had been leaking in the garage. It looked like i had a wounded predator in there  ;D

Offline Boris

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Re: Boris' G40
« Reply #4 on: May 17, 2011, 12:24:02 am »
[Arnie]If it bleeds, we can kill it[/Arnie]  :D

Offline Boris

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Re: Boris' G40
« Reply #5 on: May 21, 2011, 11:16:06 pm »
How do you get an engine onto a stand without a hoist?  Bodge it of course



Finally got there though after using another two sets of ladders and another baton to lift the other side.  Left me with this:



Some gunking and a coat of paint later:



So now its ready to be fitted next week if all goes to plan.

Offline cheddarcheese

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Re: Boris' G40
« Reply #6 on: May 22, 2011, 01:34:34 pm »
:)  ;D :D ;)

Offline Boris

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Re: Boris' G40
« Reply #7 on: May 22, 2011, 04:43:52 pm »
:)  ;D :D ;)
Theres something hidden by the oil filter that I'll post up later  ;)
« Last Edit: May 22, 2011, 04:45:29 pm by Boris »

Offline Boris

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Re: Boris' G40
« Reply #8 on: May 28, 2011, 08:22:56 pm »
Day 1 of the engine swapover:


Out with the old


In with the new



Finishing the rebuild tomorrow and hopefully starting it up.
« Last Edit: May 29, 2011, 08:00:42 am by Boris »

Offline cheddarcheese

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Re: Boris' G40
« Reply #9 on: May 28, 2011, 09:03:10 pm »
 ;D ;D

Offline Boris

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Re: Boris' G40
« Reply #10 on: May 28, 2011, 09:20:48 pm »
Had to be done  ;D ;)

Offline Boris

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Re: Boris' G40
« Reply #11 on: May 29, 2011, 09:28:19 pm »
Well rebuilt the engine today (didn't bother taking any photo's, cos you've seen it already.  Anyway, all went to plan, checked the compression with the new bottom end and three cylinders are at 12 bar, one at 11, so that worked out perfect. 

However, when I start it up, its as if its only running on three cylinders.  Revs ok, but wont hold idle and runs rough. Checked everything, including the timing in case i'd missed a connection or vacuum hose somewhere, but all seems in order.  Now I'm thinking ive a dodgy spark plug somewhere or an injector blockage.  Thoughts?

Offline PeteG40

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Re: Boris' G40
« Reply #12 on: May 30, 2011, 09:22:46 am »
are you positive the plugs are in the right order?

Offline cheddarcheese

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Re: Boris' G40
« Reply #13 on: May 30, 2011, 01:26:02 pm »
yes mate check your plugs are in order. iv had the same problem or check all your electrical connections are the pluged the right way round!

i had the white throttle plugged in the wrong way once witch took me ages to realise.


Offline Boris

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Re: Boris' G40
« Reply #14 on: May 30, 2011, 05:18:56 pm »
You mean the actual physical plugs?  I have the ht's going 1342