The thunk came from the passenger side of the engine bay. After looking over every hose and wire and running through every sinerio we could think of, they decided to start it again. This time with the MAF sensor unplugged so it wouldn't turn over. Ok, it made the normal RRRR RRR RRRR RRRR sound of an engine starved of fuel makes, and then there was a pop repeated by another pop roughly 5 seconds later. The pop sounded like when you first open a Snapple drink bottle. We stopped and decided that the pop was in time with the engines compression cycle and sounded like it was comming from the front of the engine. After looking through every thing, they tried it one more time....again with the MAF unplugged. The started "RRRRR"ed once and then stopped. It seems like the engine is somehow seized. Now these guys have tripple-checked everything at every step making sure everything was in the right place.....minus that one vaccum hose incident. Anyone have any ideas as to what may be the issue here? The chains never moved from the sprockets, no foreign objects made it into the cylinders or into the valve train, the crank angle sensors are in properly and all plugs are plugged in the proper cylinders. I am at a loss here folks. They are gonna try to coax an Infiniti tech from just up the road to come take a quick look at it tommorow. Please lemme know what you guys think. And please...no negative slamming of the mechanics. They're good guys.
Chain guides.....Uh oh!
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
Chain guides.....Uh oh!
Well the guide engine is all put back together and everything visually checked out fine. I was there when they went to start the engine this evening. Now it did make a little bit of racket, but that was expected. Then there was a thunk sound and it turned itself off. The thunk came from the passenger side of the engine bay. After looking over every hose and wire and running through every sinerio we could think of, they decided to start it again. This time with the MAF sensor unplugged so it wouldn't turn over. Ok, it made the normal RRRR RRR RRRR RRRR sound of an engine starved of fuel makes, and then there was a pop repeated by another pop roughly 5 seconds later. The pop sounded like when you first open a Snapple drink bottle. We stopped and decided that the pop was in time with the engines compression cycle and sounded like it was comming from the front of the engine. After looking through every thing, they tried it one more time....again with the MAF unplugged. The started "RRRRR"ed once and then stopped. It seems like the engine is somehow seized. Now these guys have tripple-checked everything at every step making sure everything was in the right place.....minus that one vaccum hose incident. Anyone have any ideas as to what may be the issue here? The chains never moved from the sprockets, no foreign objects made it into the cylinders or into the valve train, the crank angle sensors are in properly and all plugs are plugged in the proper cylinders. I am at a loss here folks. They are gonna try to coax an Infiniti tech from just up the road to come take a quick look at it tommorow. Please lemme know what you guys think. And please...no negative slamming of the mechanics. They're good guys.
The thunk came from the passenger side of the engine bay. After looking over every hose and wire and running through every sinerio we could think of, they decided to start it again. This time with the MAF sensor unplugged so it wouldn't turn over. Ok, it made the normal RRRR RRR RRRR RRRR sound of an engine starved of fuel makes, and then there was a pop repeated by another pop roughly 5 seconds later. The pop sounded like when you first open a Snapple drink bottle. We stopped and decided that the pop was in time with the engines compression cycle and sounded like it was comming from the front of the engine. After looking through every thing, they tried it one more time....again with the MAF unplugged. The started "RRRRR"ed once and then stopped. It seems like the engine is somehow seized. Now these guys have tripple-checked everything at every step making sure everything was in the right place.....minus that one vaccum hose incident. Anyone have any ideas as to what may be the issue here? The chains never moved from the sprockets, no foreign objects made it into the cylinders or into the valve train, the crank angle sensors are in properly and all plugs are plugged in the proper cylinders. I am at a loss here folks. They are gonna try to coax an Infiniti tech from just up the road to come take a quick look at it tommorow. Please lemme know what you guys think. And please...no negative slamming of the mechanics. They're good guys.
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
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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
Pull all the plugs, air blow out all the gasoline , and refill with a little oil, [no more 5-7cc] [remember there is only 55cc of compressed volume] and check compression, if it will still turn over, be sure to disconnect fuel FIRST. Recharge battery first/use battery eliminator-charger for full current.
Sure chains didn't slip time........you did replace both tensioners?
"The guy who's working on my car is really quite good, but this car is a definatly learning experiance for him. " quote from your earlier post.
As we say you ask how many guide jobs a tech has under his belt, if it's less than a half dozen [documented] you run away.Kind of an apprenticeship learning process, with an old hand checking the work at each step.Out of 5 master techs we only have one who does guides and 2 who can if supervised - checked. Too methodical and stressful for many personalities.
Sure chains didn't slip time........you did replace both tensioners?
"The guy who's working on my car is really quite good, but this car is a definatly learning experiance for him. " quote from your earlier post.
As we say you ask how many guide jobs a tech has under his belt, if it's less than a half dozen [documented] you run away.Kind of an apprenticeship learning process, with an old hand checking the work at each step.Out of 5 master techs we only have one who does guides and 2 who can if supervised - checked. Too methodical and stressful for many personalities.
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
Well my mechanic called over to Beaverton Infiniti and they were no help. They just said to bring it in so they could check it. They wouldn't even run through a senario or two with my mechanic. :rolleyes I then suggested the he call over to Joe of Scottsdale Infiniti as they always seem more than happy to help over there. Well Joe wasn't there and someone else answered and talked my mechanic through a few things and said that he actually got through more of the installation than many Infiniti mechanics do in training. The gentleman on the phone stated that its a good thing that it won't turn over because there is a possiblity of a foreign object stuck between the valve and the head. Possibly a screw or washer. The guy on the phone said that this is not uncommon as their mechanics have dropped screws down into the runners a couple of times. The guy on the phone said that the loud tics that sounded like snapple bottles openning were normal and it was simply oil-starved components. He said that after a few minutes of running that the clanking clattering popping noise would just disappear when oil pressure had arrived. So today and tommorow the mechanics are gonna be hard at work on my car. If push comes to shove, they said they are willing to send it to Beaverton Infiniti and get it diagnosed and fixed free of charge to me. So....if that happens I'll probubly get a loaner through Infiniti. Hmmm....Q45 loaner or M45 loaner? Decisions decisions. 
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SOCAL91Q45a
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
Well they have been taking off the plenum and valve covers and will be backing up the crank a little bit to release whatever may be stuck. They are thinking its a foreign object like a screw or bolt. After they back it up a little, they are gonna take a small magnet and tie some high-tensile fishing line to it and go fishing down the intake runners. Perhaps they will find whatever is in there that is stopping the motor. If that doesn't work, they may end out taking off the heads and inspecting the valve train closer. If they do that, I may have them port and polish the heads while they are off. They've port and polished several SR20DET's, KA18DE's and Toyota 4AGE's so I feel they know what they are doing. I'm thinkin that whilst the plenum is off I might go ahead and polish the exterior to a shiny finish. I've read up on several sites on how to polish aluminum to a shine and it seems easy, but tedious. Bling-bling yo! LOL! As I said before....if they can't figure it out they will end out sending it to Infiniti and getting it repaired at no cost to me. Man....I really hate being without a car. 
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SOCAL91Q45a
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Less work but perhaps more money - re: the plenum polish, but perhaps you might consider these folks .....
http://www.hpcoatings.com
http://www.hpcoatings.com/import_performance.htm
Here's a funky BLUE one but they have a nice polished alum color look
Lowers air intake temps, and wont discolor - works great on headers too ....
http://www.hpcoatings.com
http://www.hpcoatings.com/import_performance.htm
Here's a funky BLUE one but they have a nice polished alum color look
Lowers air intake temps, and wont discolor - works great on headers too ....
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
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SOCAL91Q45a
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
Well my mechanic has been workin on some money-making cars the past couple of days and needed to get a few cars out of the lot, so my car hasn't been worked on in the past 2 days. He did however take off my spoiler and sold it to some latino in a Rustang for $100. I already gave him the OK to do it, so thats an extra $100 in my pocket. Wow...after having that spoiler on my car for 3 years its really weird to see my car without it...
My mechanic was in a goofy mood and suggested a completely custom spoiler. Guarentied that noone else would be able to duplicate it. What a weirdo...
They popped off the plenum and intake runners and are goin fishing with a magnet and fishing line. I'm also having them flush out the fuel rail and test the injectors. They are so appologetic that they said if I wanted anything done while they're in there that they will do it at no charge. Suh-weet! Still stuck without a car though.
My mechanic was in a goofy mood and suggested a completely custom spoiler. Guarentied that noone else would be able to duplicate it. What a weirdo...
They popped off the plenum and intake runners and are goin fishing with a magnet and fishing line. I'm also having them flush out the fuel rail and test the injectors. They are so appologetic that they said if I wanted anything done while they're in there that they will do it at no charge. Suh-weet! Still stuck without a car though.
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SOCAL91Q45a
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Not to fear. A professional knows how to keep the shirt pulled down below the buckle.
Jeff, you got a good team there. I was *this close* to pulling the head after a chain guide job, but fortunately I figured out the problem before doing so. Unfortunately, it was only after I had done a bunch of other unnecessary work. A learning experience has a lot of value on its own.
Jeff, you got a good team there. I was *this close* to pulling the head after a chain guide job, but fortunately I figured out the problem before doing so. Unfortunately, it was only after I had done a bunch of other unnecessary work. A learning experience has a lot of value on its own.
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
Engine stuck at #1 TDC
Well my mechanic found that there are no foreign objects in any of the cylinders and also found that the engine spins freely in reverse, but gets caught up when spinning it forward. It seems to stop when Cyl #1 hits TDC and the hydrollic tensioner near cyl #1 ticks. It will not go past this though. Anyone have any ideas about this? Q45tech, could you please shine a bit of your wisdom on this? Any help would be greatly appreciated. Thanks!!!
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jefftrexler
- Posts: 174
- Joined: Thu Jul 25, 2002 9:15 pm
- Car: 1991 Nissan Maxima
Well uppon going down and talking to my mechanic I realized that I understood him wrong. The engine turns front and back freely until Cyl #1 hits TDC and the small hydrollic tensioner ticks. I originally thought that he said it spung freely in reverse with no problems. They'll have the face off once again tommorow and take a look inside while things are turning. I'm hoping that Q45tech will reply with some of his usual insanely brilliant knowledge. My mechanic really wants to talk to Q45tech via phone to bounce some ideas off of him, but I can't get his e-mail address and private messaging on this board is disabled.
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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
Jumped time is my guess. Because the new tensioners were not prepumped up or the old tensioners collasped if you didn't change them. Since every cover is now off, check the chain vs gear marks again.
Bent valves are the only reason it won't turn.
Have your tech call Byron at T3....... 404 - 794-7700 Tuesday morning.
Bent valves are the only reason it won't turn.
Have your tech call Byron at T3....... 404 - 794-7700 Tuesday morning.
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SOCAL91Q45a
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Q45Tec - that was very cool of you to hook JeffTrex up!
I love this board ....
Good on "ALL" Ya'll.
Ok so if its bent valve - who's the Q45 head guru's? I think I read where Q45tech is a staunch advocate of the 5 angle valve job .... ???? 5 angle vs 3 out of neccessity or preference, and as stated prior - the machines required for 5 angle jobs really raise the $$$ and are harder to find.
By the way .... Ive searched multiple times for threads on "heads" cylinder heads, valve job etc ... without getting to much meat. Im starting a new thread here:
Definative Thread on Q45 HEADS
to make a reference archive - but if Im repeating the wheel making process - post the link to the definative thread please.
All the best ....
socal
I love this board ....
Good on "ALL" Ya'll.
Ok so if its bent valve - who's the Q45 head guru's? I think I read where Q45tech is a staunch advocate of the 5 angle valve job .... ???? 5 angle vs 3 out of neccessity or preference, and as stated prior - the machines required for 5 angle jobs really raise the $$$ and are harder to find.
By the way .... Ive searched multiple times for threads on "heads" cylinder heads, valve job etc ... without getting to much meat. Im starting a new thread here:
Definative Thread on Q45 HEADS
to make a reference archive - but if Im repeating the wheel making process - post the link to the definative thread please.
All the best ....
socal
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maxnix
- Posts: 22627
- Joined: Mon Jul 22, 2002 8:11 pm
- Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45
Eric the senior tech is very good. You'll probably get an I30 loaner.jefftrexler wrote: If push comes to shove, they said they are willing to send it to Beaverton Infiniti and get it diagnosed and fixed free of charge to me. So....if that happens I'll probubly get a loaner through Infiniti. Hmmm....Q45 loaner or M45 loaner? Decisions decisions.