**URGENT** XR8 engine knock - Page 2

galaxy xr8 · 12-11-2006, 09:01 PM

Quote:

Originally Posted by Whoosha

Can do a special deal on the heads the one with the dud spring in it is a little cheaper.... :evil_laug
Only diff & a few panels left now Be quick ... the red XR8220 owner will be back in Ballarrat soon, Log on and see what I"ve been up too

:

Hmmmmmm, I've pretty much got the same car so the head's are no good to me, what else is on offer though, I like the look off them rim's, lol, how's a couple hundred sound, I know, I'm being very genrous, but I really like them rim's.lol.

RG · 12-11-2006, 09:22 PM

Now on a slightly more serious note, am I better off just getting the broken valve spring replaced (if that's what it turns out to be) or do I pay the extra and get some HD valve springs put in. Any ideas on cost or if it's even worth it.

FRDGAL · 12-11-2006, 10:22 PM

Quote:

Originally Posted by Whoosha

All good now the red rocket is resting comfortabley in down town cranbourne
in my drive way :Reverend: any one need some cheap bits :thebirds:

You're a good bloke Whoosh.

Russ, your rims look real good on my car. That was very kind of you to allow Whoosha to sell bits off your car :nutsycuck

Krissy.

Psycho Chicken · 12-11-2006, 10:35 PM

You'd be better off getting decent springs. But if you feel like being tight I've got some spare ones here.

RG · 12-11-2006, 11:13 PM

Quote:

Originally Posted by Psycho Chicken

You'd be better off getting decent springs. But if you feel like being tight I've got some spare ones here.

It will be taken to G&D tomorrow morning (needs wheels to get there guys lol) so I reckon I might have a chat to them, thanks for the offer though.

Psycho Chicken · 13-11-2006, 12:12 AM

I'm just trying to render my GT40Ps useless so I don't have the urge to put them on without doing the cam and springs at the same time.

RG · 13-11-2006, 04:28 PM

Well it is bad news, very bad news. It would appear that compression is down in cyl 8 and that the piston has decided to call it a day. It looks like i'm up for some serious $$$ now. Worst thing is i've only had the car for 2 months and it is out of its statutory warranty by 5k. I've got an aftermarket warranty on it but that only covers up to $1k so the rest will have to be forked over by me, that is unless the car yard does the right thing.

Sprint347 · 13-11-2006, 04:39 PM

Speak to FTG auto salvage (Site sponsor) mate, they have a AU XR8 long motor low km for $2k from memory... I wouldn't bother rebuilding yours unless you went for bigger/better.

I'll buy your block if the bore isn't injured

james22 · 13-11-2006, 04:51 PM

Quote:

Originally Posted by RedXR8220

Well it is bad news, very bad news. It would appear that compression is down in cyl 8 and that the piston has decided to call it a day. It looks like i'm up for some serious $$$ now. Worst thing is i've only had the car for 2 months and it is out of its statutory warranty by 5k. I've got an aftermarket warranty on it but that only covers up to $1k so the rest will have to be forked over by me, that is unless the car yard does the right thing.

Not good man, how many km have you got on her man. I got the same car as you (and ex chaser at that) so its had a very hard life and wondering if mine is gonna give up anytime soon?

b2tf · 13-11-2006, 04:55 PM

Quote:

Originally Posted by james22

Not good man, how many km have you got on her man. I got the same car as you (and ex chaser at that) so its had a very hard life and wondering if mine is gonna give up anytime soon?

Nah James, yours will be fine. Its in the panel shop getting everything else repaired so it wont do a spring!

:

xr8ute · 13-11-2006, 05:06 PM

Quote:

Originally Posted by RedXR8220

Well it is bad news, very bad news. It would appear that compression is down in cyl 8 and that the piston has decided to call it a day.

Are you sure the piston is the problem? Or is it just the compression test showing zero on that cylinder?

My mum drove my car for about 40km's after it broke a valvespring, but she didn't realise it at the time (she rang me to tell my car was idling funny

).

The valve was bent from hitting the piston, and was stuck in the guide. A compression test on that cylinder showed up 0psi.

The piston was marked but not badly damaged. However it had also killed a rocker, pushrod, and lifter.

If your is a similar case, then you really just need to replace the broken bits and reco the heads.

OR ditch the GT40p heads, fit some AFR165's, and have the lower intake ported to suit

Anyway, hope the bottom end is really OK.

james22 · 13-11-2006, 05:36 PM

Quote:

Originally Posted by b2tf

Nah James, yours will be fine. Its in the panel shop getting everything else repaired so it wont do a spring!

:

smartass lol

:

RG · 13-11-2006, 08:51 PM

G&D pulled the head off and have confirmed the worst, the piston in cyl 8 is no more. What kind of a rebuild do you guys reckon I could get for say...5k? Some of you may remember that when I got her there were some issues with the tune of the Unichip, well I did get that tune fixed eventually but obviously the damage had already been done...the cause of this failure is detonation.

LG · 13-11-2006, 08:56 PM

Devastating.... Look on the bright side.. Nows your chance to upgrade ;)

RG · 13-11-2006, 09:02 PM

Quote:

Originally Posted by LG

Devastating.... Look on the bright side.. Nows your chance to upgrade ;)

I know

: :sm_drool:

**Whoosha** · 13-11-2006, 09:03 PM

Dam sorry to hear that Russ it still ran preety good for a XR7. that would be the 3rd or 4th XR7 we"ve had now..
as for the mods watch that Matt bloke down there you could end up with a real super charged nitro fired monster and broke for ever

:
its such a good looking low K car to will be in touch soon ..
Whoosha

620hp_gt · 13-11-2006, 09:12 PM

Quote:

Originally Posted by RedXR8220

G&D pulled the head off and have confirmed the worst, the piston in cyl 8 is no more. What kind of a rebuild do you guys reckon I could get for say...5k? Some of you may remember that when I got her there were some issues with the tune of the Unichip, well I did get that tune fixed eventually but obviously the damage had already been done...the cause of this failure is detonation.

Was the connecting rod smashing around in the bore with No piston for 30km's or more.

If so, i doubt your talking a 5k re-build.

You may need a short motor and your heads checked/repaired. The heads on the 220's already have alot more work than most.

You do see low km' 220kw motors complete in parts peddler and some good wreckers. Doing this you could be on the road again for less than 5k.

You made my heart race, thinking they must have weak Pistons,
but detonation will kill any piston...Bad tune=MORE MONEY..

RG · 13-11-2006, 09:16 PM

I think it's the piston ring hat or something or other that is the issue, top of the piston I believe so not too much damage in there.

620hp_gt · 13-11-2006, 09:20 PM

Lucky...in one sence then

RG · 13-11-2006, 09:23 PM

Quote:

Originally Posted by 620hp_gt

Lucky...in one sence then

True...it gives me an excuse to make it go harder without the missus complaining...could this be fate lol.

RG · 13-11-2006, 09:59 PM

Quote:

Originally Posted by Whoosha

Dam sorry to hear that Russ it still ran preety good for a XR7. that would be the 3rd or 4th XR7 we"ve had now..
as for the mods watch that Matt bloke down there you could end up with a real super charged nitro fired monster and broke for ever

:
its such a good looking low K car to will be in touch soon ..
Whoosha

He was trying to get me to stroke it, if I could afford it I would...mmm 347RedXR8220 :Up_to_som

xr8ute · 13-11-2006, 10:42 PM

Ouch...that sounds nasty. Detonation is a killer.

AUXRVIII · 13-11-2006, 11:07 PM

Quote:

Originally Posted by RedXR8220

He was trying to get me to stroke it, if I could afford it I would...mmm 347RedXR8220 :Up_to_som

"347RedXR8320" Sounds better

RG · 14-11-2006, 07:50 PM

Quote:

Originally Posted by AUXRVIII

"347RedXR8320" Sounds better

This may very well become true

JC · 14-11-2006, 09:11 PM

Quote:

Originally Posted by RedXR8220

This may very well become true

See - told you it wouldn't be that much! It won't be a full-on fire breathing 347 for $5k, but it will still be a torque monster and should run very well with the 220 standard intake plus the herrods stuff you have. Plus it will have the potential to be a fire breathing monster as you "find" more funds.

I'm thinking mine may one day be a 347 LPG stroker (once the kids have left school, in, oh, around 16 years time, LOL).

xr8ute · 14-11-2006, 10:09 PM

I dont think stroking is the best option if you cant afford decent cylinder heads, and ported (lower) intake/or aftermarket intake. IMO, a std stroke 302 with some AFR165's would be a lot more fun than a GT40P headed 331/347.

To be fair though, i haven't driven either combination....so take my advice with a big grain of salt :P

NeishaXR8_347 · 14-11-2006, 10:21 PM

Bayford parts on ebay are selling a 5L efi short, including block, cam, crank, rods, pistons and its all new stuff. They are after $1500 thats buy it now.

Shaun

RG · 15-11-2006, 07:47 AM

Quote:

Originally Posted by neishaxr8

Bayford parts on ebay are selling a 5L efi short, including block, cam, crank, rods, pistons and its all new stuff. They are after $1500 thats buy it now.

Shaun

Hmmm interesting.

RspecAU · 15-11-2006, 08:28 AM

Quote:

Originally Posted by neishaxr8

Bayford parts on ebay are selling a 5L efi short, including block, cam, crank, rods, pistons and its all new stuff. They are after $1500 thats buy it now.

Shaun

Is that on Ebay????? As they sell lots of overpriced stuff on there.

**Chris** · 15-11-2006, 04:12 PM

Quote:

Originally Posted by neishaxr8

Bayford parts on ebay are selling a 5L efi short, including block, cam, crank, rods, pistons and its all new stuff. They are after $1500 thats buy it now.

Shaun

Shaun, sell him your engine, made good power on my dyno, send it to cranbourne, get a flasher, bingo fun times