Thread: B14 SR20 not starting

+ Reply To Thread

First

Last

Posts: 41-50 of 58

Search Thread

2008-05-01 03:55:26

#41

Danja

Resident Mathematician

Join Date: 2007-12-11
Location: Minneapolis, MN
Posts: 1,339
Trader Score: 0 (0%)

Originally Posted by 91serturbo

woh what do you mean was running on 3 cyl. did i miss sumthing?

are you saying you had a dead hole prior to doing the timing chain?

Lol.. yea he also said he didn't do the chain already

haha

0 Likes

Be the first to like this post.

B13 Quick Reference Package ∞ 95 M3 ∞ Perfection is simple, logical, and mathematical.

Reply Reply With Quote

2008-05-01 03:58:13

#42

Danja

Resident Mathematician

Join Date: 2007-12-11
Location: Minneapolis, MN
Posts: 1,339
Trader Score: 0 (0%)

Originally Posted by 91serturbo

if engine is flooded the spark plug cannot ignte the fuel and the more you try to start the engine eventually you will wash all the oil out of the cylinder and off of the rings with no lube on the rings during cranking the rings will loose there seal.

the oil will restore the seal some what. possable enuph for the engine to start and let the rings reseat much like when the engine was new and the rings needed to be worn in

That makes some sense, but the compression ring doesn't normally seal with oil, that's why I'm confused about it. Just beginning to increase the air pressure in the piston should be sealing the compression ring shouldn't it? Self sealing I mean.

0 Likes

Be the first to like this post.

B13 Quick Reference Package ∞ 95 M3 ∞ Perfection is simple, logical, and mathematical.

Reply Reply With Quote

2008-05-01 03:59:32

#43

91serturbo Online/offline status of 91serturbo is unknown

Member

Join Date: 2008-04-27
Location:
Posts: 194
Trader Score: 0 (0%)

in the next step were i asked for lots of oil in the cylinder i am hopping to temporarlly seal a large leak like a bent valve or blown head gasket or cracked valve seat.

watching the vid i sounds like the engine almost stops turning but keeps spinnin like its hydro locked or a piston hitting sumthn

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-05-01 04:01:08

#44

jer_760

Banned from Classifieds

Join Date: 2007-12-11
Location: Arlington, Tx
Posts: 1,835
Trader Score: 4 (100%)

Originally Posted by Danja

Since 140 is the normal spec compression for the engine, than I don't see how this could be caused by timing either, since if it were off, then you should not get the normal compression in the other two. Maybe I'm wrong about this but if the pistons are synced (and they will be) than if cam timing was off they would all be bad, not just 2.

I'm pretty sure that 140 is below the minimum. I believe the fsm say it should be within 149-178

0 Likes

Be the first to like this post.

95 200sx
sr20ve

Reply Reply With Quote

2008-05-01 04:03:30

#45

91serturbo Online/offline status of 91serturbo is unknown

Member

Join Date: 2008-04-27
Location:
Posts: 194
Trader Score: 0 (0%)

Originally Posted by Danja

im sayn the fuel washes away the oil resulting in a conditon were the rings no longer seal like they are extremlly worn and are wiggiling up and down in the ring lands allowing the air and feul to pass by the rings

like blow by multiplied by 100

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-05-01 04:04:56

#46

jer_760

Banned from Classifieds

Join Date: 2007-12-11
Location: Arlington, Tx
Posts: 1,835
Trader Score: 4 (100%)

Originally Posted by Danja

I'm sure someone here knows if the OEM valves fully open will clear TDC piston or not but I don't lol. Some engines they do.

Stuck valves seem about as unlikely to me, but how do they get stuck anyway? There's an awful lot of force on them by the spring? Just wondering on this.

Do you know which one was not working before you ripped it apart?

The valves will hit the piston if they are fully open and the piston is at TDC.

0 Likes

Be the first to like this post.

95 200sx
sr20ve

Reply Reply With Quote

2008-05-01 04:06:09

#47

91serturbo Online/offline status of 91serturbo is unknown

Member

Join Date: 2008-04-27
Location:
Posts: 194
Trader Score: 0 (0%)

Originally Posted by jer_760

I'm pretty sure that 140 is below the minimum. I believe the fsm say it should be within 149-178

i agree i usally get 180 + on a healthy engine im hopping the engine is flodded causing comp to be down on all cyl.

it sounds like he has a base engine prob prior to repairs thats being agrivated by a dizy or injection prob

0 Likes

Be the first to like this post.

Reply Reply With Quote

2008-05-01 04:33:01

#48

Danja

Resident Mathematician

Join Date: 2007-12-11
Location: Minneapolis, MN
Posts: 1,339
Trader Score: 0 (0%)

Ah you are right, my mistake. Just checked FSM and it says:

Max: 185
Min: 156

Max difference between Cylinders: 14

0 Likes

Be the first to like this post.

B13 Quick Reference Package ∞ 95 M3 ∞ Perfection is simple, logical, and mathematical.

Reply Reply With Quote

2008-05-01 04:34:38

#49

Danja

Resident Mathematician

Join Date: 2007-12-11
Location: Minneapolis, MN
Posts: 1,339
Trader Score: 0 (0%)

Also, that's good info to know, I've never heard of that oil thing on the rings before. Thanks for the explanation on that.

0 Likes

Be the first to like this post.

B13 Quick Reference Package ∞ 95 M3 ∞ Perfection is simple, logical, and mathematical.

Reply Reply With Quote

2008-05-01 04:38:28

#50

Danja

Resident Mathematician

Join Date: 2007-12-11
Location: Minneapolis, MN
Posts: 1,339
Trader Score: 0 (0%)

Guess I should have bothered to check the FSM first haha :o

0 Likes

Be the first to like this post.

B13 Quick Reference Package ∞ 95 M3 ∞ Perfection is simple, logical, and mathematical.

Reply Reply With Quote

First

Last

+ Reply To Thread

Thread Information

There are currently ? users browsing this thread. (? members & ? guests)
StubUserName