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Location:
Gold Coast
Registered:
September 2004
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Location:
Brisbane
Registered:
May 2002
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Re: MX83 Bearings
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Sun, 05 September 2004 23:27
 
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The 7M is far from bullet-proof, I can assure you of that! It's not at all uncommon for the bottom end to start letting go once it's got a few miles under its belt.
The 1JZ-GTE into MX83 conversion is very common. Do a search and you'll find more info than you can poke a stick at.
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Location:
Brisbane
Registered:
June 2003
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Re: MX83 Bearings
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Mon, 06 September 2004 01:06
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| GSF1200 wrote on Sat, 04 September 2004 10:06 |
I have MX83 Grande with 97000 ks bought the car from an 80-year-old (one owner) in immaculate condition. I replaced the exhaust with a 2.5in system hi flow cat and two straight thru mufflers a bit loud when at full throttle but acceptable, K&N air filter then tweaked the air flow meter a little to add a bit more fuel. The mods did make a big difference more than I expected the torque increase was a big supirise fuel use about 60/65 ltrs 490/530 ks. Then 6000 ks later Head Gasket gone also valve stem seals hardened. (Smoke puff at startup) Now repaired, engine looked great inside no wear visible cams etc. now Im sure I can hear a bearing noise big end/main this can not be possible the bottom ends are bullet proof (allegedly) or has this been known before at such low Ks or am I hearing things ?? If someone has put a 1JZGTE into one of these could you please give me some advise or a link maybe, Cheers
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The 7ms had a poor lubrication system in the bottom end (thanks norbie) and as soon as they start getting used low on oil, or shit oil is used..or just as they get old, The big ends have a habit of letting go and grabbing the crank. When i rebuilt my 7m i pulled out the block to discover one of the big ends was almost gone. The fellow before me treated the car like shit, and it was quite evident. Itd also been cooked so many times, the head was rooted, there was a scratch in no 6 bore where itd almost seized, the block was warped and the big end was almost gone.
Other than that they are a great motor. Mine put out 115RWKW with an auto yesterday..i am stoked with the only mod being a 2.5" exhaust...it screams on the dyno! Not bad for an 86 model motor!
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Location:
Gold Coast
Registered:
September 2004
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Re: MX83 Bearings
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Tue, 07 September 2004 08:25
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Thanks for the replys. At this stage I will keep driving and see if the sound gets worse. Then if so it will be a chaser front cut.
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Location:
melb
Registered:
June 2003
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Re: MX83 Bearings
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Tue, 07 September 2004 13:24
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Why bash 7Ms again, it doesnt matter what engine you have, if you DONT service it it will fail . 7Ms are a few years older than a 1J so naturally theres more sludge in them,sludge = failure. just wait a few more years then 1Js will have there turn, or if your unfortunate enough to own a poorly serviced 1MZ/2AZ then there turn is now.
So many engines cop a bad rap, when a lot of the time its from poor servicing .
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Location:
Sydney
Registered:
May 2002
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Re: MX83 Bearings
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Tue, 07 September 2004 15:38
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cambelt i agree....but the 1J is just a fukcen cracker of a motor!!! go the 1J dewd i killed a few 7M's and THOUSANDS of dollars before waking up to myself!!! Get a jzx81 half cut then PM me i'll let you know whats involved ...its piss easy too!
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