Rebuild Q 45?

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infinitiq45man29
Posts: 1
Joined: Sun May 18, 2008 10:53 pm
Car: 1992 Infiniti Q45

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Does anyone here know how much it is to rebuild an engine for a 1992 Q 45? I currently have an Infiniti Q45 that knocks all the time. When you start it or even if you drive it. It sounds like it is coming from the passenger side. I flushed it once already and used the cheapest oil and filter. I have filled it up again and am thinking of doing it again. But I am also thinking of rebuilding or buying a rebuilt engine if I can't figure it out. The weird thing is it hasn't lost any power! What could be going on with this car??? Any thoughts would be greatly appreciated.


Q45tech
Moderator
Posts: 14296
Joined: Tue Apr 30, 2002 3:19 am
Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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The problem with rebuilding a Q engine [to brand new specs] is the time required, speciality tools required, and oem parts GREATLY EXCEED the cost of a used JDM JUNKYARD engine even with the necessay updates to make it reliable [new chain guides, swapping exhaust manifolds, resealing valve covers, new plenum hoses, and new knock sensors and harness].

We charge $4400 to do the swap job correctly because selecting the best available JDM engine requires a visit to the wholesaler [who will allow returns if you find problems when valve covers, front cover, oil pan are removed].

It takes about 25 hours to select, restore, and swap in a JDM engine.

$1,000 for engine, $1,100 for new parts, $2125 labor, $150 sales tax.

There are junkyards that just swap a used engine [don't change a thing] for maybe $2500 but the whole exercise is not to have to deal with engine for years................this rarely happens if you don't do guides, reseals, new plugs and hoses and oil pan reseal clean.

StarPD
Posts: 686
Joined: Sat Jan 13, 2007 3:55 pm
Car: 2005 Q45

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It's a long ride from SA to Atlanta, but if you really like your Q, everything else is standup (?) and you plan on keeping the car, a trip to T3 is in order, regardless of the time and expense. Be advised that with a knocking engine, you may not make it all the way to Atlanta.

Otherwise, drive it till it seizes up and then use it as a parts car or sell it as one to someone here who regularly parts out dead Qs.

Q45tech
Moderator
Posts: 14296
Joined: Tue Apr 30, 2002 3:19 am
Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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We haven't done an engine swap on a 90-93 Q* in a year except for employee owned Q because they hear $4k and run, usually selling us the Q for $400 or just leaving it to be stripped after the storage fees. We charge $10/day for dead space.

The problem is to get an abandoned title it costs $400 in fees but a stripped shell can be junked for pure scrap metal.

We are doing more Lexus now V6, I6, V8 because they sell for $2k higher.G20 are being saved and reengined due to better MPG.

Since I already have a standby engine, I'll probably do it depending on when I swap transmission number 3 out

User avatar
elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
Contact:

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Yeah you definitely need to come to a crossroads. If you think you'll want the car for another 100k miles then spend the money. Otherwise, you're best off parting it out!!

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Raxephon
Posts: 1910
Joined: Tue Jul 27, 2004 8:53 am
Car: '04 RX8...for the moment...

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Didi you get a code 34 from the ecu or are you just calling it a knock because of what it sounds like?

Q45denver
Posts: 945
Joined: Thu Jul 25, 2002 6:24 am
Car: 1995 Infiniti Q45t
1990 Infiniti Q45
1998 Nissan Frontier

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Q45tech wrote:Since I already have a standby engine, I'll probably do it depending on when I swap transmission number 3 out
JDM engine? Have you checked it out?

momodemo
Posts: 2
Joined: Sat Feb 02, 2008 10:52 am
Car: 1994 infiniti q45

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I have an engine from a '94 you can have for 500.00 plus shipping. It is still in the car so you can come on down to beautiful Austin Texas and party on 6th street, then haul the engine with you. I have the trannie and other parts too.Charles Offor


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