whats normal compression on a vq35? buying a used engine
#1
whats normal compression on a vq35? buying a used engine
i was browsing car-part and i believe i found a contender for a swap. the notes in the listing read as follows
2003 maxima OIL 74-20,50@2000,COMP 200-220 77k miles/124k km for $1000CAD + taxes
-i called and found out a few things but i forgot what the 'oil 74-20' meant... something to do with oil pressure cold idle vs hot (i'll call back and check).
-50@2000 means 50psi oil pressure at 2000rpm
-and 200-220 compression reading (dry)
i was really happy to see such a high compression reading over the others, is this normal? i figured high compression reading = good ring seal = no to very little oil burning
so what do you guys think of those numbers, this a good buy? whats the stock healthy compression reading?
2003 maxima OIL 74-20,50@2000,COMP 200-220 77k miles/124k km for $1000CAD + taxes
-i called and found out a few things but i forgot what the 'oil 74-20' meant... something to do with oil pressure cold idle vs hot (i'll call back and check).
-50@2000 means 50psi oil pressure at 2000rpm
-and 200-220 compression reading (dry)
i was really happy to see such a high compression reading over the others, is this normal? i figured high compression reading = good ring seal = no to very little oil burning
so what do you guys think of those numbers, this a good buy? whats the stock healthy compression reading?
#2
IIRC somewhere in the 185 PSI range.
FSM now ...
FSM now ...
Originally Posted by 2003 FSM EM-88
Unit: kPa (kg/cm2, psi)/300 rpm
Compression pressure
Standard 1,275 (13.0, 185)
Minimum 981 (10.0, 142)
Differential limit between cylinders 98 (1.0, 14)
Compression pressure
Standard 1,275 (13.0, 185)
Minimum 981 (10.0, 142)
Differential limit between cylinders 98 (1.0, 14)
Last edited by NmexMAX; 01-08-2015 at 08:07 AM.
#3
Compression speaks nothing in regards to oil consumption. You have oil control rings, and compression rings.
Get one from a newer altima or maxima (08+) and be done. Zero oil consumption since I swapped the HR version in.
Get one from a newer altima or maxima (08+) and be done. Zero oil consumption since I swapped the HR version in.
#5
faaaack i forgot about that lol! well i don't know if the guy swapping my engine can do that much newer of a swap, its not drop in though but omg i would love little to no oil consumption
whats the differences after 06? i now the 04-06 have external egr, different KS sensor plug/harness and injector clips iirc. its ok coming from a cvt car?
09 is way too much work for this guy i saw the 5.7 gen
whats the differences after 06? i now the 04-06 have external egr, different KS sensor plug/harness and injector clips iirc. its ok coming from a cvt car?
09 is way too much work for this guy i saw the 5.7 gen
#7
as i was reading your thread on page 3 supra11 tried to jack your thread with 07 maxima motor swap lol thats what i want to do since SurraTT mentioned right after that, that only a few components need a swap, is this true?
can someone point me to more info on swapping 07-08 maxima vq35 into 5.5 gen?
#8
#9
https://maxima.org/forums/5th-genera...o-5-5-gen.html
https://maxima.org/forums/5th-genera...me-engine.html
Last edited by george__; 01-11-2015 at 10:54 AM.
#10
A 2007-2008 Nissan Maxima is a gen 6 maxima. It's easy swap without too many complications
https://maxima.org/forums/5th-genera...o-5-5-gen.html
https://maxima.org/forums/5th-genera...me-engine.html
https://maxima.org/forums/5th-genera...o-5-5-gen.html
https://maxima.org/forums/5th-genera...me-engine.html
what i've learned is:
-swap the fuel rail for same connectors
-swap the IM because 02-03 has no egr (if the 02-03 egr is internal wouldn't a newer engine essentially delete it?? i don't get this)
-swap the knock sensor to 02-03 and re-use 02-03 harness
-swap the CPS when going from auto to manual (how do you know where to mount it on the manual??)
-swap upper oil pan to manual when using auto engine
thats for 04-06 but i'd really like an 07-08 max vq35de. oil consumption is still reported by some (not as bad) but i'd like to avoid it as much as possible if i can with a newer vq with as little work as possible.
is there more to swap on 07-08? did they have a plastic intake manifold? cvt to manual swap differences? i need to know as much definitive info as i can, i can't be figuring stuff out on the fly because i'm not doing a swap and i need to tell my friend all the info necessary to not take up the hoist for more than i plan.
04-06 is 6g 07-08 is 6.5g just like 00-01 is 5g and 02-03 is 5.5. its the same car but refreshed, hence the .5g
Last edited by carsnwomen91; 01-11-2015 at 12:18 PM.
#11
ok so i did a little more research in choosing an 07-08... thanks again to aackshun's guide i found these bolt right up with the same changes you'd do to an auto 04-06 minus that these ones don't have egr in the intake manifold AND its plastic like the 00vi
gonna look for some 07-08's!
gonna look for some 07-08's!
#13
No the guide has some wrongs... But 07-08 is even more bolt on than 04-06. The cps is in the same place and the oil pans remain the same, so just jus the knock sensor and injector clips are different and maybe a 1-2 other clips but easy. You may still have to replace the timing chain tensioners before you drop it in, those years still had some issues.
#15
It's much easier to solder some wires and cut a little aluminum off than disassembling the entire timing system.
Thread
Thread Starter
Forum
Replies
Last Post