Guides - I have searched

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Alowther
Posts: 17
Joined: Tue Jul 25, 2006 7:33 pm
Car: Infiniti Q45

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Hey, Recently purchased a 91 Q with 150,000 KM (Canadian) and you all put me on to the guides. I have not driven it, and now am doing the guides. (GOOD THING TOO)STORY When I took the cover off the drivers side slack side guide dropped out in pieces. Near as I can tell I have all of the guide face that bolts to the engine block, and am missing about an inch of the guide face that is in contact with the chain. The chain marked the guide bolts only slightly and nothing else. So I figure that I came out pretty good, most of the guide is recovered, and no major engine damage has resulted. So I have read all the FAQs and prefious posts but the following is still fuzzy.

QUESTION I am now ready to put in the new guides, I have cinched the chains up with zip ties. My question is how do I get the old guides out when the chains are tight with the zip ties? do I slack the zip ties off and then pull them out and then retighten them? will this skip the chain?

Also when I am putting in the new tension side guides, what is the best way to do this, should I back the tensioner off and then put the new one in and retighten it or what? Do I measure the 1mm at the top of the guide or at the bottom?

Finally, Iwas turning the oil pump without the pully on it, and it gets hard to turn by hand once it is at pressure. I assume this is normal, I can see the oil pumping through the spigot by the crank (to oil the chains) but nowhere else. Should I be looking for something else too?

Thanks in advance guys. Im gonna try and have this thing finished tomorrow.

Adam


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Rex
Posts: 16845
Joined: Sat Apr 05, 2003 6:50 pm
Car: None
Location: South of ATL
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Not sure iof the info you're looking for is in these threads, but hopefully they will help.zerothread?id=92996http://forums.nicocl ... d?id=92729

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ceningolmo
Posts: 1763
Joined: Fri Oct 14, 2005 2:37 pm
Car: Silver 1991 Q45a & Green 1991 Q45a

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When I did the guides on mine I left the zip ties on and the chains were kept tight while I removed old guides.

To quote Wes, "I'm not going to lie to you" this part of the job sucked. I just kept pushing, pulling, prodding, until I found the angle that would let the guides out from behind the chain.

It feels like you might break something, it feels like they aren't going to come out. But, if you eventually find the right angle they will pop out. You just need to stare at it for a while. If you get real desperate, a second set of eyes/hands might help. Ask a friend to look at it.

maxnix
Posts: 22627
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45

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Alowther wrote: So I figure that I came out pretty good, most of the guide is recovered, and no major engine damage has resulted. So I have read all the FAQs and prefious posts but the following is still
Unfortunately, most is not all.

You should plan on dropping the oil pan and examining the oil pump supmp intake, as well as the pump itself. Otherwise all you work may be for naught.

Alowther
Posts: 17
Joined: Tue Jul 25, 2006 7:33 pm
Car: Infiniti Q45

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Thanks for the input guys. Planning to have the pan pulled. By the looks of things it was pretty much a clean break as I can put the remnants of the guide back together and they fit nicely. So hopefully it is a big chunk in the pan and not a gibillion little shards. The job was actually quite a bit easier than I had expected given that shops were quoting 1500-2000 to do it. It took me 10 hours from end to end.

Final question, I assume the slack side tensioners are hydraulically (oil pressure) adjusted, as I did not see any other way to set the tension.

Thanks for the help and I will keep you posted.

FYI

I didnt want to try and turn the starter to break the crank bolt free, so I used 10' of climbing webbing, wrapped the harmonic ballancer alot and tied the other end to the frame rail. This held the pully steady while I came onto it with the cheater bar. Also worked on reassembly. Amazing what you can come up with when you are short air tools.


maxnix
Posts: 22627
Joined: Mon Jul 22, 2002 8:11 pm
Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45

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Sounds like a good job. Hand crank it first, then if all clears, turn it with the starter for a minute or so with the fuel pump fuse pulled to pressure the tensioners and HLA. Then reinsert the fuse and start, all after the oil pan of course.

Do check the tensioners and oil pump chain before you button it back up.

Q45tech
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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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It is standard proceedure to REPLACE the oil chain and tensioner [when doing guide job] since everyone stretches and groves the tensionser!


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