no, top of block, but the head is higer, heres a trick, jack your car up on the passenger side a few pumps just to make the car lean. Pull your lower hose off of the thermostat housing and pull it strait back towards you so the hose goes higher, then find a way to hold it back like that. Now take the thermostat housing off, with the car leaning this way you won't lose as much coolant, but yes you will spill some but not much.
Its a 15min job and I think the part is like 10$ so I would just try that first.

Come to think of it when I had my SI it did the exact thing that yours is doing, the spring on the thermostat had gotten weak and it was opening to early.

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That was exactly the problem. New unit in and it's back to normal after getting the air out of the coolant system.

Thanks for all the replies!

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2001 Prelude SH
1990 CRX Si
Hondas are an addiction

you said unit

Good deal, glad we could help

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haha unit..... but glad you got it fixed.

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