1g 7 bolt w/2g head in 2g body Info needed.

[Muzzled]

so i spun a bearing this morning in my 97 tsi awd

Found a 1g 7 bolt locally complete minus the water pump/timing belt goodies.
165 155 155 160 compression

160k KMS on it (i'm Canadian remember)

so far what i have read is that i will have to treat it like a 6 bolt. in a 2g Except that im using a 2ghead to bypass the cas issues. my 97 head has the cam angle sensor on the opposite side of the gears.


Would just like to verify my findings.

have to use 1g waterpump yes?
and the one thing i couldnt find is if the lower mounts are the same or not.

i did notice about the drivers side mount needing ground a bit for the WP.

just looking for a bit of clarification.

Thanks.

Trying to get the car back on the road for xmas

 

[19Eclipse90]

so far what i have read is that i will have to treat it like a 6 bolt. in a 2g

Correct.

Except that im using a 2ghead to bypass the cas issues. my 97 head has the cam angle sensor on the opposite side of the gears.

Okay, but what are you planning for the crank position sensor?

If the 1G 7-bolt oil pump/front case doesn't have provisions to mount the crank position sensor, rebuild your original 2G oil pump/front case and use it instead. That will eliminate any of the 1G-in-a-2G wiring that would need to be done.

Would just like to verify my findings.

have to use 1g waterpump yes?
and the one thing i couldnt find is if the lower mounts are the same or not.

i did notice about the drivers side mount needing ground a bit for the WP.

You use the water pump that matches the block and, as you know, the motor mount bracket must be cleared to fit around the water pump.

The lower mounts as in the lower engine mounts? All 2G engine mounts and brackets are reused.

 

[RamenPride]

I'm pretty sure the 1G 7-bolt front case has provisions for the crank angle sensor.

 

[19Eclipse90]

There's been claims going both ways so instead of dealing with absolutes, I'll stick with the potentiality that it may not have the provisions.

http://www.dsmtuners.com/forums/cylinder-head-short-block/408250-1g-7-bolt-2g.html

 

[Muzzled]

well i just got it home, buddy didn't mention that some parts were missing from it, ie t-stat housing, and after more research about 1g 7 bolts... the turbo feed line for coolant from the block is non existent on them, from what i remember reading all 1g ran the feed line off of the t-stat housing.


so far so good but i'm trying to get it all back together before xmas

Ive read the above pages as well, just wanting to make sure im 100% so far before proceeding further.

 

[turbotom]

Ok here it is, I bought a 2g last year and had a rebuilt 7 bolt 1g (which aren't prone to crank walk) and you pretty much have to treat it like a 6 bolt. Leave everything on it, 1g intake manifold, head and etc. Listen, wiring is the easy part, all you have to do is follow the RRE wiring instillation and seeing that your car is a 97, there is no need for switching injector wire around. There is nothing wrong with a 1g 7 bolt because it very similar to the 6 bolt. I would just swap the 7 bolt over head/intake and all. Make it easy on yourself instead of added the 2g head and 2g 7 bolt front case, and etc..... That engine I swapped to that 2g hauled ass and the engine still runs great with the new owner which he tells me all the time,.

 

[WRXkiller92]

1G 7 bolts do not have the provisions for a crank position sensor. I know this because I just helped my buddy put a six bolt in his 93 TSI and he didn't have to worry about the CPS.

 

[Muzzled]

Ok here it is, I bought a 2g last year and had a rebuilt 7 bolt 1g (which aren't prone to crank walk) and you pretty much have to treat it like a 6 bolt. Leave everything on it, 1g intake manifold, head and etc. Listen, wiring is the easy part, all you have to do is follow the RRE wiring instillation and seeing that your car is a 97, there is no need for switching injector wire around. There is nothing wrong with a 1g 7 bolt because it very similar to the 6 bolt. I would just swap the 7 bolt over head/intake and all. Make it easy on yourself instead of added the 2g head and 2g 7 bolt front case, and etc..... That engine I swapped to that 2g hauled ass and the engine still runs great with the new owner which he tells me all the time,.

i agree however it wasn't a full engine that i picked up. timing side is all there but intake/exhaust all exterior stuff isn't there nor is the valve cover.

im working with what i have. ie the current 97 tsi head.intake/exhaust mani's cas, and exterior accessories off the 2g.

and basically a bare 1g 7 bolt long block.

 

[turbotom]

i agree however it wasn't a full engine that i picked up. timing side is all there but intake/exhaust all exterior stuff isn't there nor is the valve cover.

im working with what i have. ie the current 97 tsi head.intake/exhaust mani's cas, and exterior accessories off the 2g.

and basically a bare 1g 7 bolt long block.

So if you have the long block?, then the other parts are easy to get.

Comparison 7 bolt to 6 bolt:


Intake/Exhaust manifolds are the same (same)

Water pipe/pump (same as 6 bolts but different from 2g 7 bolts)

Cylinder heads (same)

Oil pans (different but the same as a 2g 7bolt)

Oil filter housing (different but same as 2g 7 bolt)

valve cover (same)

throttle bodies (different and smaller than a 6 bolt one)

t stat housing (different and but the same as a 6 bolt)

I wouldn't use the 2g intake manifold seeing that the ports are much smaller and the head as well. You get more flow with the 1g than if you would with the 2g one.

 

[19Eclipse90]

Ok here it is, I bought a 2g last year and had a rebuilt 7 bolt 1g (which aren't prone to crank walk) and you pretty much have to treat it like a 6 bolt. Leave everything on it, 1g intake manifold, head and etc. Listen, wiring is the easy part, all you have to do is follow the RRE wiring instillation and seeing that your car is a 97, there is no need for switching injector wire around. There is nothing wrong with a 1g 7 bolt because it very similar to the 6 bolt. I would just swap the 7 bolt over head/intake and all. Make it easy on yourself instead of added the 2g head and 2g 7 bolt front case, and etc..... That engine I swapped to that 2g hauled ass and the engine still runs great with the new owner which he tells me all the time,.

In my opinion, you are doing yourself a huge favor by reusing the 2G head and intake manifold as well as retaining the 2G cam and crank sensors. The head and intake manifold because you retain all mounting points for original equipment, the cam and crank sensors because you don't have to mess with the random misfire issue that is so common with using the 1G cam sensor.

Of course, the OP is free to choose what he will.

1G 7 bolts do not have the provisions for a crank position sensor. I know this because I just helped my buddy put a six bolt in his 93 TSI and he didn't have to worry about the CPS.

Right on queue.

Putting a 1G engine in another 1G isn't particularly relevant here, but I appreciate someone else coming in with the opposing side.

The claim that they do have provisions for the CPS comes largely from the front case/oil pumps now having the same part number as the 2G units. Originally, they didn't, but that doesn't mean that there was never a 1G 7-bolt out there that had the front case/oil pump replaced with the 2G part. So again, check for the potentiality; it's better to know all your options than to settle for one that may not be ideal.

 

[pauleyman]

There are two part numbers for the 1g 7 bolt and they are the same part numbers as the early 2g. Given that all early 2gs have a crank sensor it stands to reason it's likey al 1g 7 bolts have the provision for the sensor. I dont' have one in front of me so I can't tell I only have the latest part number which is also the supercession number for the 2g both A and B model.

 

[TSI_93]

Your going to want to use the timing bits from your 2g 7 bolt (Crank trigger disc, and timing gears) and a 2g front case. If you buy a replacement front case it should have provisions for the crank position sensor.

 

[nissannewell]

Yes grind the mount and use the 1g water pump. Also nice because you just use the 11mm head studs. No drilling required.

 

[Muzzled]

Can close this, i failed to check last night to make sure the crank turns due to no sleep for 2 days and today when i popped the head off all i saw was rust in all cylinders. couldnt tell where the pistons/cylinder walls meet.

the guy didnt know either but he has been nice enough to refund the money tomorrow so. for now im using my spare 7 bolt bottom end i was building a stroker with =/