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PollyMobiles Rebuild
- Thread starter pollyp
- Start date
OP
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pollyp
Club Member
ok retorque to 70deg
OP
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pollyp
Club Member
OP
OP
pollyp
Club Member
ok heres how the pistons look 1-4. almost all dry.
sealant has dried enough.
started her up, drive out & about to warm up using no boost. stopped over to check coolant tank, seems normal and no bubbling.
ok time to boost and check if it really leaks. up small hill, few secs of 10psi several times. stopped over and OH BUGGA tis abit worser now. tank overflowing n bubbling once per sec and rad top fuming with exhaust.
damn
remap is wed morning. i desperately need a new head gasket preferably genuine nissan. they always take a day to order but i'll see if they can get it on evening if i call em at 9 or if i could drive to the warehouse to get it personally with a broken car.
alternatively i could get those messy graphite head gasket down the local engine parts store but ya think it'll be able to do the job, and i hate cleaning graphite gasket off.
will have to get gasket asap tomorrow then change the gasket throughout tomorrow night/morning hoping it'll be fit to go down surrey wed morning. gonna need some redbull.
why do these last minute issues always pop up? grr
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OP
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pollyp
Club Member
ok drove to work this morning keeping boost below 0psi and seems it's fine.
rang dealers at 8.45 bout getting a genuine gasket by tday but guy says tis not till tomorrow cos nissan warehouse supplier is down south but he'll ring around for alternatives..
then he rang back and he found through one of his suppliers such as PN or Firstline that they produce head gaskets for original manufacturers, prob the same genuine stuff, for £45 and can get it for the afternoon:grinning: says it cuts out the middle men buying direct from the supplier cos nissan dealers get their parts from the supplier and slaps on their £30 margin just for the brand hence why their genuine gasket always costed me £80.
rang dealers at 8.45 bout getting a genuine gasket by tday but guy says tis not till tomorrow cos nissan warehouse supplier is down south but he'll ring around for alternatives..
then he rang back and he found through one of his suppliers such as PN or Firstline that they produce head gaskets for original manufacturers, prob the same genuine stuff, for £45 and can get it for the afternoon:grinning: says it cuts out the middle men buying direct from the supplier cos nissan dealers get their parts from the supplier and slaps on their £30 margin just for the brand hence why their genuine gasket always costed me £80.
OP
OP
pollyp
Club Member
That's good news Paul
Christ £80 for a gasket
Are the £20 quid eBay specials a big no no then?
the cheapo ebay £20 ones are composite graphite headgaskets that breaks up upon removal and are a complete mess to clean up. the genuine nissan ones are multi layer steel and stay intact, maybe stronger.
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pollyp
Club Member
i dunno what frank/noddie put in it till i take the head off tonight. you guys in here at the mo?
suspect its just a minute leak, there's no smoke at all, cyls dry. either way, the HG needs replacing
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pollyp
Club Member
since i won't have enough bed-in time as i expected due to this HG issue tonight i figure i should fit the new HG throughout the night/morning, drive down to surrey still on mineral to bed it in more, keep under 0psi till i reach ed, then change oil & filter to fully synth once i'm there before remapping.
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pollyp
Club Member
noddie said he fitted an expensive graphite HG on the forged engine. no idea why its failed yet, maybe too much boost.
i've tweaked the injector multiplier so that its 14.7afr when cruising and it richens up as normal under acceleration just as it shows on the mapping
got the HG from nissan. looks like just a normal composite HG i usually get from engine shop/ebay. bah it'll do for now. long as it survives the remap dyno session.
i've tweaked the injector multiplier so that its 14.7afr when cruising and it richens up as normal under acceleration just as it shows on the mapping
got the HG from nissan. looks like just a normal composite HG i usually get from engine shop/ebay. bah it'll do for now. long as it survives the remap dyno session.
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frank
Club Member
aye, dont you just love it when they stick like sheeet to a blanket paul :suspect:
you might wanna check the headface is true eh, a dusting of matt black and a gentle lick with a bodyfile will usually show any distortion
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pollyp
Club Member
once i get home from work tonight i'll be working flat out to replace the HG. i expect it'll take some time to scrap/clean off the old graphite. think i'll just fit the HG frank. even if its distorted theres nothing i could do bout it. wouldn't the file just cut at the alloy face?
frank
Club Member
OP
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pollyp
Club Member
the head has more contact surfaces vs the block hence gasket more likely to stick with head
Stani1029
Club Member
polly your new gasket is actually quite good. i was getting these for £25 each back in the day, would #### me off when they brought out the graphite ones that never had any sort or red seal etc on them. just a thought could the problem be a dodgy headbolt?? or were they replaced during the engine build. i know they dont need replaced in general but things fail...
OP
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pollyp
Club Member
Replace HG & Remap forged piston turbo engine
ok monday night i took out the head. was such a looooong task when the turbo stuffs in the way. ended up removing the alternator, turbo assembly, rail, TB, dizzy, then head
pulled head off. was a graphite gasket so some bits of it was left on the block
pic of gasket stuck to head. cyl 4-1
peeled gasket off n wipe clean. cyl 1-3
ok monday night i took out the head. was such a looooong task when the turbo stuffs in the way. ended up removing the alternator, turbo assembly, rail, TB, dizzy, then head
pulled head off. was a graphite gasket so some bits of it was left on the block
pic of gasket stuck to head. cyl 4-1
peeled gasket off n wipe clean. cyl 1-3
look at the gasket topside
and bottomside
can't see any major signs of cyl gasket blowing. only small clue i see are softened/broken gasket of the coolant pathway holes at cyl1 but dunno if that was from pulling the head off. and near that broken section, the metal round cyl gasket seals that has a black coating on em, cyl1 has a part of the coating from the underside removed. maybe thats where it blew under 10psi?
head all cleaned
block clean much as possible
new gasket
all finally fitted at 4am
7am got up. primed oil & fuel. started her up and lotsa steam than before was comin out the exhaust, rad top has occasional bubbles, oh no I feared the worst
took it round the block in hoping it'll burn off. on way back the coolant tank drops abit and exhaust still little steamin although prob cos its a cold morning. well its 8am and i'm outa time cos gotta set off now to make it in time. ah #### it lets go for it
all tools packed up and off to surrey. stopping several times to check fluids n plugs. the coolant level stabilises and steam goes away during hot daytime so i think the gaskets ok but oil is dropping at a fast pace (high to low in 200miles). not wanting to blew this gasket till the remap i kept below 0psi, saves abit of fuel
eventually got there. has been running abit lean on hot motorway so plugs were white with tiny deposits, ed says thats prob bits of the piston
anyway got on dyno. ed n charlie did their thang. boosted her afew times. i was dreading if she'd blow but nope she held up fine:grinning: eventually ended up with 162bhp
will scan the dyno sheet soon
long drive back home still consuming oil, more if boosting. was on last drop of oil from can and just made it home by cruising at 70 with abit to spare. changed to 5w50 fully synth.
this morning i started her up and exhaust steams abit but strangely this really dusty thick black floating soot particles came out of the pipe, was abit worrying coating the entire backside of me garage in black dust. is that norm?
drove to work 15miles away rechecked oil and looks abit stable for now. need to check over long distance.
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solarice
Ex. Club Member
Cant complain with 162bhp. Good to know it got there and back ok.
Mines a little sooty on occasion (can usually see it on the rear of the car) but it doesnt shoot soot. Putting the car on the dyno i found quite stressfull (even though i used to give it the same grief when driving / mapping it), always good when it gets back off still working. haha.
I should really finish my map off...theres some power waiting to be recovered.
Good to know it got there and back ok.Mines a little sooty on occasion (can usually see it on the rear of the car) but it doesnt shoot soot. Putting the car on the dyno i found quite stressfull (even though i used to give it the same grief when driving / mapping it), always good when it gets back off still working. haha.
I should really finish my map off...theres some power waiting to be recovered.
OP
OP
pollyp
Club Member
i'm not sure. couldn't see any signs of blowing. did ya get to see the HG from the failed engine or ya just sold it on?
