tangalora
Offline
450 posts
1990 Q45
West Coast
10-12-2003
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| « Re: Can we see chain guides from the Q45 engine bottom? (tangalora) | 1:02 AM 12/5/2004 |
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If the problematic chain guides can actually be seen from below, what special tools would be required?
 Attachment: nico_q45_chainguide_from_below_what_do_we_look_for.jpg (57068 bytes, downloaded 2452 times)
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DAEDALUS
Offline
6231 posts
1990 Q45
El Segundo, CA
7-22-2002
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Heh, never thought to mention it while you were in there. No one ever pulls an oil pan *before* doing the guides, cause pulling the front cover is a little more straightforward. You might not need anything to see all guides (heck, you're looking at one right in the pic right there). Maybe a mirror. I'll dig up some pics if I can that might help.
Are you considering doing the guides since you're in there?
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DAEDALUS
Offline
6231 posts
1990 Q45
El Segundo, CA
7-22-2002
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Labeled parts. The tension-side guides are the ones that fail. Driver's side fails first usually, probably because the passenger-side one is closer to vertical.
Collection of parts for the chain guide job.
Original, failure-prone guide.
Close-up of new guide installed. Note that it's a 2-piece design, nylon-clad metal piece on one side and a thick beefy nylon piece on the other side.
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tangalora
Offline
450 posts
1990 Q45
West Coast
10-12-2003
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| « The story of O (oil pan) | 4:24 AM 12/5/2004 |
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| Quote, originally posted by DAEDALUS » | | Are you considering doing the chain guides? |
What would you do if you found this in your oil pan? 
Attachment: nico_q35_chain_guide_first_big_piece_found_in_oilpan.jpg (19366 bytes, downloaded 2269 times)
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tangalora
Offline
450 posts
1990 Q45
West Coast
10-12-2003
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| « Re: The story of Oilpan | 4:42 AM 12/5/2004 |
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This is the horror story I awakened to when I dropped the oil pan.
I've been working all evening on this and it's nearly daylight.
Dunno how to interpret the photo below ... but it might be bad.I've summarized the main Q45 chain-guide replacement sources below.
NOTE: I did not list the articles, mpg, jpgs, etc. which came up NOT FOUND. I'm sure I missed some good ones.
Can folks post any missing article references to this thread for all to benefit.
Attachment: nico_q45_chainguide_two_largest_pieces.jpg (18322 bytes, downloaded 2236 times)
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tangalora
Offline
450 posts
1990 Q45
West Coast
10-12-2003
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| « Re: The story of Oilpan (tangalora) | 4:49 AM 12/5/2004 |
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Ooops. Forgot to list the references I dug up on Nico.BTW, your chain-guide photos are MOST EXCELLENT!
Very helpful. Like a map. How do you show multiple illustrative photos in a single posting, and with helpful captions to boot? The guides that are redesigned are the tension-side guides.
The one that almost always fails is the driver-side guide.
Light blue RTV around the timing cover is likely factory.
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Photographic summary of a chain guide replacement:
http://www.q45.org/guidereplacement.html
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Photo of tension side guides and slack side guides:
http://forums.nicoclub.com/zerothread?id=53660
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Timing chain parts list:
http://forums.nicoclub.com/zerothread?id=15226
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Chain Guide step by step:
http://forums.nicoclub.com/zerothread?id=1632
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Chain engineering:
http://www.ustsubaki.com/chainguide.html
http://www.ustsubaki.com/section8b.html#0020
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Chain guide poll:
http://forums.nicoclub.com/zerothread?id=12551
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Checking chain guides:
http://forums.nicoclub.com/zerothread?id=7058
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Replacing chain guides:
http://forums.nicoclub.com/zerothread?id=15861
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Supporting the engine for chain guide replacement:
http://forums.nicoclub.com/zerothread?id=27044
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Aligning marks for timing chain guide replacement:
http://forums.nicoclub.com/zerothread?id=71463
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Tension side is metal reinforced:
http://forums.nicoclub.com/zerothread?id=92067
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Checking for new chain guides:
http://forums.nicoclub.com/zerothread?id=15648
http://forums.nicoclub.com/zerothread?id=12941
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Chain guide replacement hints:
http://forums.nicoclub.com/zerothread?id=26454
http://forums.nicoclub.com/zerothread?id=28462
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Chain guide noise debug:
http://forums.nicoclub.com/zerothread?id=16281
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Attachment: nico_q45_chainguide_clogging_oil_pickup_strainer.jpg (19898 bytes, downloaded 2215 times)
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Q45tech
Q45 Guru
Offline
13721 posts
1990 Q45 323,000 miles 19.5 years ownership
Marietta , Georgia
4-30-2002
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Now comes the tough work[ compared to simple oil pan replacement]......chain guide replacement without retiming the engine.Change the oil pump as it is probably crunched inside [gear mesh out of tolerance]. I would pull the valve covers and look at cams for wear to decide about the bottom end bearings..........you must pull engine to an engine stand to even think about bearing/ ring replacement.
A 15 year old engine without new style guides a nightmare waiting to happen. What you don't know about the insides [guide condition] can surely hurt you.
Don't give up if you've gotten this far!
Copyright 2009. Nipuspan International Corporation. All rights reserved. This material may not be broadcast, rewritten or redistributed.
http://www.t3atlanta.com/
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elwesso
Super Moderator
Offline
30835 posts
94 Q45t 5 speed NICO Track Slut
Anderson and Angola IN
2-23-2003
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| « Re: (Q45tech) | 6:15 AM 12/5/2004 |
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T it looks like youve caught this just in time.. I thought you already did your guides, didnt you?? or that was something else, i was going to ask...THe oil strainer is clogged with guide pieces..... With the oil pan removed, the front cover is waiting to come off..... Hell, my engine is out of the car, id almost be tempted to sell (or give?) you my updated guides from the 94..... Like Dennis said, your so far, DONT GIVE UP! We're here for you!
The Infiniti Q45 Resource, Q45.org | Nissan VH series website
NICO Sponsor Directory | Infiniti Of Scottsdale, 1-888-216-5328, ask for Justin, say Wes sent you.
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Jesda
Nice Pants, full of bacon and win
Offline
30647 posts
LETS GO VANNING
ITS A PARTY IN THE USA
5-5-2003
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THANK YOU Alora and Robert for posting those photos! Awesome reference and a good reminder to drop my oil pan and find out whats down there.
| Quote, originally posted by MinisterofDOOM » | | Get out of my gene pool. And take your ES350 with you. |
BUY INFINITI PARTS - 1-888-216-5328 | NICO Porn Thread | http://www.q45.org | http://www.vh45de.com
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DAEDALUS
Offline
6231 posts
1990 Q45
El Segundo, CA
7-22-2002
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Oh my! The stuff in the pick-up...looks like some of it might be metal chunks from the pan? Disastrous!
Dennis is right--before you spend any money on parts, get an indication the engine is worth it. If it was me, I would pull just the passenger-side valve cover (easiest) and look at/measure those bearings. If they're good, then replace the oil pump and do the guides. But only when you're done with everything will you be able to measure the oil pressure and get that warm fuzzy feeling that the engine is healthy.Posting images is done with typing "[img]" first, then the link (http://blahblahblah), followed by "[/img]".
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Jesda
Nice Pants, full of bacon and win
Offline
30647 posts
LETS GO VANNING
ITS A PARTY IN THE USA
5-5-2003
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http://www.tivocommunity.com/t...bcode
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tangalora
Offline
450 posts
1990 Q45
West Coast
10-12-2003
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| « I'm not at all sure what to do | 1:04 AM 12/6/2004 |
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I'm not at all sure what to do now.It's like I was expecting Christmas to arrive today, and, then someone suddenly moved it undeterminately further away on me. I had fully expected to put the new oil pan on today and be proudly driving the Q45 to work tomorrow. Should I put the new oil pan, mounts, bushings, crossmember, etc. back on, and then, (with the engine no longer obstructed by the overhead support), figure out what to do about the chain guides, oil pump, oil-pump chain, etc. ? Or, should I leave the oil pan, crossmember, alternator, comopressor, etc. off, and immediately (with the engine still supported from above) order a chain guide kit & other parts from Joe? Personally, I'd rather finish one job before starting another (if it makes sense). P.S. The first thing I did was put a magnet to the pieces; everythings non-magnetic. Not a shard of metal was to be found in the pan or in the oil pickup. P.S.S. I don't have a web site to host images so I'll just upload them (I'll keep them small but not too small so as to miss detail).
Attachment: nico_q45_oilpan_relatively_undamaged.jpg (99688 bytes, downloaded 2339 times)
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pito11213
Offline
1041 posts
1992 Lexus LS 400
brooklyn ny
4-14-2004
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Well I was under the impression that removal of the oil pan was secondary to the guides. Only if you found broken guides do you pull the pan. The actual job of replacing the guides does not require removal of the motor or the peripherals that you listed. IMO
New car-based forum. Help it grow with informative viewshttp://redlinesoldiers.forumotion.com/index.htm
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Jesda
Nice Pants, full of bacon and win
Offline
30647 posts
LETS GO VANNING
ITS A PARTY IN THE USA
5-5-2003
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Tangalora had an accident and the oil pan was severely damaged as a result.For hosting: http://q45.org/hosting.html
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911/Q45
Offline
1376 posts
Autos, Fitness
San Luis Obispo, CA
7-23-2002
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It will be much easier to R&R the lower front cover with the oil pan removed. It fits pretty tightly between the pan and the upper front covers.
Black over Gray 1990 Q45, JWT ECU & TCU, Rear Sway Bar, Eibach and Tokico, Stillen Tension Rods and Strut Brace , Skyline Brakes, Steel Hoses, 17x8 Wheels, 255/45 Sumitomo HTR+. Really is Mom's old car with 90K miles!
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tangalora
Offline
450 posts
1990 Q45
West Coast
10-12-2003
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| « Does a chain guide replacement mix with new spark plugs | 10:20 PM 12/6/2004 |
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I really hate to ask this ('cause the work load seems to be expanding like a dry sponge in water) ... but I haven't replaced my spark plugs in a while.Q: Does a chain guide replacement make the plug work any easier? That is, should I take off a few more things to make the plug access easier? (Be gentle with me if this is a stooopid question as I've never done the plugs and have been too timid & embarrassed to ask before this.)
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DAEDALUS
Offline
6231 posts
1990 Q45
El Segundo, CA
7-22-2002
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| « Re: Does a chain guide replacement mix with new spark plugs (tangalora) | 10:24 PM 12/6/2004 |
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| Quote, originally posted by tangalora » | Q: Does a chain guide replacement make the plug work any easier?
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Not unless you need to remove the valve covers for any reason (jumped time, replacing chains, etc). Very little labor overlap otherwise, except removing the plastic covers and intake hose.
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Q45denver
Offline
941 posts
1995 Q45t 1990 Q45 1998 Nissan Frontier
Denver CO
7-25-2002
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| « Re: Does a chain guide replacement mix with new spark plugs (DAEDALUS) | 4:00 PM 12/21/2004 |
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Isn't it much easier to secure the timing chain so that it doesn't jump time with the valve covers off? It is probably much easlier to do everything with the engine out of the car as well. At least your engine doesn't have any serious sluge.
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DAEDALUS
Offline
6231 posts
1990 Q45
El Segundo, CA
7-22-2002
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Definitely. You can just tie-strap the chain to the tooth (exhaust side, anyway). Even if the cam snaps around the chain will be in the same spot. With the valve covers off jumping time isn't really that much of a concern to begin with, since you can reset timing right there.
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mattd1979
Offline
375 posts
1990 Pearl White Q45 plain Jane with 162,000 miles. Replaced knock sensors, knock sensor harness, fu
Jacksonville Florida
10-29-2004
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| « Re: Can we see chain guides from the Q45 engine bottom? (tangalora) | 6:26 PM 9/1/2006 |
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Does anybody know if tangalora ever finished the job with the chain guides or did she end up getting rid of the car? I remember reading up to this point when my mom got her 91 Q back in November of '04 and noticed that the progress stopped .
1990 Pearl White Q45 with 162,000 miles(now at 218,000) and the Robert Bowen edition 3 level switchable ECU. Replaced knock sensors, knock sensor harness, fuel injection spider harness, all under plenum hoses and fuel lines. Previous owner had the timing chain and guides replaced at 111,000 miles by dealer. 1st gear start TCU and B&M tranny cooler mounted between condensor and radiator. It is a Work in Progress. 
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maxnix
NICO Supporter
Offline
38 posts
1995 Q45, 1995 Q45t, 2000 Q45
Austin TX
7-22-2002
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| « Re: Can we see chain guides from the Q45 engine bottom? (mattd1979) | 10:08 PM 9/1/2006 |
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Seems like Tangalora developed serious health problems and sadly may in fact no longer be with us.She left a sterling benchmark for well researched, well written, and well edited posts.
Brian
1995 Q45 & Q45t & 2000 Q45
Discover the power of the button!
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szhosain
Super Moderator
Offline
14223 posts
2003 M45. Brilliant Silver.
San Jose CA
7-23-2002
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| « Re: Can we see chain guides from the Q45 engine bottom? (maxnix) | 6:29 AM 9/3/2006 |
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| Quote, originally posted by maxnix » | | Seems like Tangalora developed serious health problems and sadly may in fact no longer be with us. |
Yes. We have been unable to track her down ... may be more permanent than just missing at NICO.  | Quote, originally posted by maxnix » | | She left a sterling benchmark for well researched, well written, and well edited posts. |
Indeed!  Z
Our M35/45 Forums: M35/45 at NICO, M35forum, and M45forum! ... Infiniti Service Manuals are available here!
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