Car blows alot of smoke

hockysa

hockysa

New Member
Mar 19, 2008
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Melbourne, Australia
www.supramania.com
Hey guys,

I own a 1986.5 MA70 with a 7M-GE. Not too long ago my car got abit fkt up and I got the head gasket fixed.

The head got machined and re-shimmed new OEM headgasket was installed.

Now when I had the engine apart I noticed the cylinders 5 and 2 were slightly damaged/worn. I wanted to change the pistons at the time but my dad insisted it would be ok...

Anyways now I find that the car misses occasionally and blows alot of smoke most of the time. (although my dad thinks the missing is due to leaking spark i tihnk he's only part right.)


Ok so what I want to do is change the pistons or just the piston seals at least... BUT.. without changing the headgasket... is that possible?

am I able to take the pistons out by taking off the crank and not have to re bore the cylinder??

I will change the ignition coil first to double check but I was wondering if the pistons not sealing could be a likely cause or if its unheard of.

also the reason for me being so stingy is the fact that I would like to upgrade to a 1JZ-GTE but am not in a position to do so atm, but still require a working car that's not going to be targeted by police/epa...
 
M

MA70AEROTOP

New Member
Sep 24, 2008
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Perth
to replace piston rings you will need to strip down the motor..best thing is to get a motor out of a MX83 cressida and put that in with your rear sump! should be able to pick one up for around $100 - $400. I got my one that was rebuild appoxx 14xxxkm ago and shes mint :aigo:
 
hockysa

hockysa

New Member
Mar 19, 2008
137
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0
Melbourne, Australia
www.supramania.com
AJ'S 88NA;1339600 said:
Are you sure that that is the problem, compression test would some what narrow it down.
Click to expand...

Will do

benchwarmer;1339622 said:
What color is the smoke and under what conditions is it coughed up?
Click to expand...

Smoke is white? usually taking off from the lights it'll give a little puff. occasionally it'll puff out for abit when I first start it. and on the freeway sometimes when the revs are at about 3200
 
s383mmber1

s383mmber1

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Oct 31, 2005
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Somers New York
tbcmorris;1340501 said:
White smoke headgasket, blue smoke rings or valve seals
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Not neccassarily. Be careful on the advice you give/receive. White smoke is NOT only and always the head gasket.

My advice is for you to do a leak down test, and report back.
 
hockysa

hockysa

New Member
Mar 19, 2008
137
0
0
Melbourne, Australia
www.supramania.com
s383mmber1;1340509 said:
Not neccassarily. Be careful on the advice you give/receive. White smoke is NOT only and always the head gasket.

My advice is for you to do a leak down test, and report back.
Click to expand...

yeah I just changed the headgasket. so i'd say rings/pistons are more likely but i could be unlucky...

whats the leak down test
 
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